Author: "Delubac, Timothée" - Searchworks@Jio Institute Digital Library Search Results

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109 results on '"Delubac, Timothée"'

1. The Mass-Metallicity Relation at $z\sim0.8$: Redshift Evolution and Parameter Dependency

Author: Huang, Chi, Zou, Hu, Kong, Xu, Comparat, Johan, Lin, Zesen, Gao, Yulong, Liang, Zhixiong, Delubac, Timothee, Raichoor, Anand, Kneib, Jean-Paul, Schneider, Donald P., Zhou, Xu, Yuan, Qirong, and Bershady, Matthew A.
Subjects: Astrophysics - Astrophysics of Galaxies
Abstract: The spectra of emission-line galaxies (ELGs) from the extended Baryon Oscillation Spectroscopic Survey (eBOSS) of the Sloan Digit Sky Survey (SDSS) are used to study the mass-metallicity relation (MZR) at $z\sim0.8$. The selected sample contains about 180,000 massive star-forming galaxies with $0.6 < z < 1.05$ and $9 < {\rm log}(M_{\star}/M_{\odot}) < 12$. The spectra are stacked in bins of different parameters including redshift, stellar mass, star formation rate (SFR), specific star formation rate (sSFR), half-light radius, mass density, and optical color. The average MZR at $z\sim0.83$ has a downward evolution in the MZR from local to high-redshift universe, which is consistent with previous works. At a specified stellar mass, galaxies with higher SFR/sSFR and larger half-light radius have systematically lower metallicity. This behavior is reversed for galaxies with larger mass density and optical color. Among the above physical parameters, the MZR has the most significant dependency on SFR. Our galaxy sample at $0.6
Published: 2019
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2. Overview of the DESI Legacy Imaging Surveys

Author: Dey, Arjun, Schlegel, David J., Lang, Dustin, Blum, Robert, Burleigh, Kaylan, Fan, Xiaohui, Findlay, Joseph R., Finkbeiner, Doug, Herrera, David, Juneau, Stephanie, Landriau, Martin, Levi, Michael, McGreer, Ian, Meisner, Aaron, Myers, Adam D., Moustakas, John, Nugent, Peter, Patej, Anna, Schlafly, Edward F., Walker, Alistair R., Valdes, Francisco, Weaver, Benjamin A., Zou, Christophe Yeche Hu, Zhou, Xu, Abareshi, Behzad, Abbott, T. M. C., Abolfathi, Bela, Aguilera, C., Alam, Shadab, Allen, Lori, Alvarez, A., Annis, James, Ansarinejad, Behzad, Aubert, Marie, Beechert, Jacqueline, Bell, Eric F., BenZvi, Segev Y., Beutler, Florian, Bielby, Richard M., Bolton, Adam S., Buckley-Geer, Cesar Briceno Elizabeth J., Butler, Karen, Calamida, Annalisa, Carlberg, Raymond G., Carter, Paul, Casas, Ricard, Castander, Francisco J., Choi, Yumi, Comparat, Johan, Cukanovaite, Elena, Delubac, Timothee, DeVries, Kaitlin, Dey, Sharmila, Dhungana, Govinda, Dickinson, Mark, Ding, Zhejie, Donaldson, John B., Duan, Yutong, Duckworth, Christopher J., Eftekharzadeh, Sarah, Eisenstein, Daniel J., Etourneau, Thomas, Fagrelius, Parker A., Farihi, Jay, Fitzpatrick, Mike, Font-Ribera, Andreu, Fulmer, Leah, Gansicke, Boris T., Gaztanaga, Enrique, George, Koshy, Gerdes, David W., Gontcho, Satya Gontcho A, Gorgoni, Claudio, Green, Gregory, Guy, Julien, Harmer, Diane, Hernandez, M., Honscheid, Klaus, Lijuan, Huang, James, David, Jannuzi, Buell T., Jiang, Linhua, Joyce, Richard, Karcher, Armin, Karkar, Sonia, Kehoe, Robert, Kneib, Jean-Paul, Kueter-Young, Andrea, Lan, Ting-Wen, Lauer, Tod, Guillou, Laurent Le, Van Suu, Auguste Le, Lee, Jae Hyeon, Lesser, Michael, Levasseur, Laurence Perreault, Li, Ting S., Mann, Justin L., Marshall, Bob, Martinez-Vazquez, C. E., Martini, Paul, Bourboux, Helion du Mas des, McManus, Sean, Meier, Tobias Gabriel, Menard, Brice, Metcalfe, Nigel, Munoz-Gutierrez, Andrea, Najita, Joan, Napier, Kevin, Narayan, Gautham, Newman, Jeffrey A., Nie, Jundan, Nord, Brian, Norman, Dara J., Olsen, Knut A. G., Paat, Anthony, Palanque-Delabrouille, Nathalie, Peng, Xiyan, Poppett, Claire L., Poremba, Megan R., Prakash, Abhishek, Rabinowitz, David, Raichoor, Anand, Rezaie, Mehdi, Robertson, A. N., Roe, Natalie A., Ross, Ashley J., Ross, Nicholas P., Rudnick, Gregory, Safonova, Sasha, Saha, Abhijit, Sanchez, F. Javier, Savary, Elodie, Schweiker, Heidi, Scott, Adam, Seo, Hee-Jong, Shan, Huanyuan, Silva, David R., Slepian, Zachary, Soto, Christian, Sprayberry, David, Staten, Ryan, Stillman, Coley M., Stupak, Robert J., Summers, David L., Tie, Suk Sien, Tirado, H., Vargas-Magana, Mariana, Vivas, A. Katherina, Wechsler, Risa H., Williams, Doug, Yang, Jinyi, Yang, Qian, Yapici, Tolga, Zaritsky, Dennis, Zenteno, A., Zhang, Kai, Zhang, Tianmeng, Zhou, Rongpu, and Zhou, Zhimin
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: The DESI Legacy Imaging Surveys are a combination of three public projects (the Dark Energy Camera Legacy Survey, the Beijing-Arizona Sky Survey, and the Mayall z-band Legacy Survey) that will jointly image approximately 14,000 deg^2 of the extragalactic sky visible from the northern hemisphere in three optical bands (g, r, and z) using telescopes at the Kitt Peak National Observatory and the Cerro Tololo Inter-American Observatory. The combined survey footprint is split into two contiguous areas by the Galactic plane. The optical imaging is conducted using a unique strategy of dynamically adjusting the exposure times and pointing selection during observing that results in a survey of nearly uniform depth. In addition to calibrated images, the project is delivering a catalog, constructed by using a probabilistic inference-based approach to estimate source shapes and brightnesses. The catalog includes photometry from the grz optical bands and from four mid-infrared bands (at 3.4, 4.6, 12 and 22 micorons) observed by the Wide-field Infrared Survey Explorer (WISE) satellite during its full operational lifetime. The project plans two public data releases each year. All the software used to generate the catalogs is also released with the data. This paper provides an overview of the Legacy Surveys project., Comment: 47 pages, 18 figures; accepted for publication in the Astronomical Journal
Published: 2018
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3. Quasi-Stellar Objects acting as potential Strong Gravitational Lenses in the SDSS-III BOSS survey

Author: Meyer, Romain A., Delubac, Timothée, Kneib, Jean-Paul, and Courbin, Frédéric
Subjects: Astrophysics - Astrophysics of Galaxies
Abstract: We present a sample of 12 Quasi-Stellar Objects (QSOs) potentially acting as strong gravitational lenses on background Emission Line Galaxies (ELG) or Lyman-$\alpha$ Emitters (LAEs) selected selected through a systematic search of the 297301 QSOs in the Sloan Digital Sky Survey (SDSS)-III Data Release 12. Candidates are identified by looking for compound spectra, where emission lines at a redshift larger than that of the quasar can be identified in the residuals after a QSO spectral template is subtracted from the observed spectra. The narrow diameter of BOSS fibers (2") then ensures that the object responsible for the additional emission lines must lie close to the line of sight of the QSO and hence provides a high probability of lensing. Among the 12 candidates identified, 9 have definite evidence for the presence of a background ELG identified by at least 4 higher-redshift nebular emission lines. The remaining $3$ probable candidates present a strong asymmetrical emission line attributed to a background Lyman-$\alpha$ emitter (LAE). The QSO-ELG (QSO-LAE) lens candidates have QSO lens redshifts in the range $0.24\lesssim z_{QSO} \lesssim 0.66$ ($0.75 \lesssim z_{QSO} \lesssim 1.23$ ) and background galaxy redshifts in the range $0.48 \lesssim z_{S,ELG} \lesssim 0.94$ ($2.17 \lesssim z_{S,LAE} \lesssim 4.48$). We show that the algorithmic search is complete at >90% for QSO-ELG systems, whereas it falls at 40-60% for QSO-LAE, depending on the redshift of the source. Upon confirmation of the lensing nature of the systems, this sample may quadruple the number of known QSOs acting as strong lenses. We have determined the completeness of our search, which allows future studies to compute lensing probabilities of galaxies by QSOs and differentiate between different QSO models. (Abridged), Comment: 15 pages, 12 figures, 3 tables. Accepted for publication in A&A. Updated version to match accepted version: addition of algorithm completeness characterisation and improved & more concise text. Results and candidates remain unchanged
Published: 2017
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4. Overview of the DESI Legacy Imaging Surveys

Author: Dey, Arjun, Schlegel, David J, Lang, Dustin, Blum, Robert, Burleigh, Kaylan, Fan, Xiaohui, Findlay, Joseph R, Finkbeiner, Doug, Herrera, David, Juneau, Stéphanie, Landriau, Martin, Levi, Michael, McGreer, Ian, Meisner, Aaron, Myers, Adam D, Moustakas, John, Nugent, Peter, Patej, Anna, Schlafly, Edward F, Walker, Alistair R, Valdes, Francisco, Weaver, Benjamin A, Yèche, Christophe, Zou, Hu, Zhou, Xu, Abareshi, Behzad, Abbott, TMC, Abolfathi, Bela, Aguilera, C, Alam, Shadab, Allen, Lori, Alvarez, A, Annis, James, Ansarinejad, Behzad, Aubert, Marie, Beechert, Jacqueline, Bell, Eric F, BenZvi, Segev Y, Beutler, Florian, Bielby, Richard M, Bolton, Adam S, Briceño, César, Buckley-Geer, Elizabeth J, Butler, Karen, Calamida, Annalisa, Carlberg, Raymond G, Carter, Paul, Casas, Ricard, Castander, Francisco J, Choi, Yumi, Comparat, Johan, Cukanovaite, Elena, Delubac, Timothée, DeVries, Kaitlin, Dey, Sharmila, Dhungana, Govinda, Dickinson, Mark, Ding, Zhejie, Donaldson, John B, Duan, Yutong, Duckworth, Christopher J, Eftekharzadeh, Sarah, Eisenstein, Daniel J, Etourneau, Thomas, Fagrelius, Parker A, Farihi, Jay, Fitzpatrick, Mike, Font-Ribera, Andreu, Fulmer, Leah, Gänsicke, Boris T, Gaztanaga, Enrique, George, Koshy, Gerdes, David W, Gontcho, Satya Gontcho A, Gorgoni, Claudio, Green, Gregory, Guy, Julien, Harmer, Diane, Hernandez, M, Honscheid, Klaus, Huang, Lijuan, James, David J, Jannuzi, Buell T, Jiang, Linhua, Joyce, Richard, Karcher, Armin, Karkar, Sonia, Kehoe, Robert, Jean-Paul, Kneib, Kueter-Young, Andrea, Lan, Ting-Wen, Lauer, Tod R, Le Guillou, Laurent, Le Van Suu, Auguste, Lee, Jae Hyeon, Lesser, Michael, Levasseur, Laurence Perreault, Li, Ting S, Mann, Justin L, and Marshall, Robert
Subjects: Space Sciences, Physical Sciences, catalogs, surveys, astro-ph.IM, Astronomical and Space Sciences, Astronomy & Astrophysics, Astronomical sciences, Particle and high energy physics
Abstract: The DESI Legacy Imaging Surveys (http://legacysurvey.org/) are a combination of three public projects (the Dark Energy Camera Legacy Survey, the Beijing-Arizona Sky Survey, and the Mayall z-band Legacy Survey) that will jointly image ≈14,000 deg2 of the extragalactic sky visible from the northern hemisphere in three optical bands (g, r, and z) using telescopes at the Kitt Peak National Observatory and the Cerro Tololo Inter-American Observatory. The combined survey footprint is split into two contiguous areas by the Galactic plane. The optical imaging is conducted using a unique strategy of dynamically adjusting the exposure times and pointing selection during observing that results in a survey of nearly uniform depth. In addition to calibrated images, the project is delivering a catalog, constructed by using a probabilistic inference-based approach to estimate source shapes and brightnesses. The catalog includes photometry from the grz optical bands and from four mid-infrared bands (at 3.4, 4.6, 12, and 22 μm) observed by the Wide-field Infrared Survey Explorer satellite during its full operational lifetime. The project plans two public data releases each year. All the software used to generate the catalogs is also released with the data. This paper provides an overview of the Legacy Surveys project.
Published: 2019

5. The Fourteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the extended Baryon Oscillation Spectroscopic Survey and from the second phase of the Apache Point Observatory Galactic Evolution Experiment

Author: Abolfathi, Bela, Aguado, D. S., Aguilar, Gabriela, Prieto, Carlos Allende, Almeida, Andres, Ananna, Tonima Tasnim, Anders, Friedrich, Anderson, Scott F., Andrews, Brett H., Anguiano, Borja, Aragon-Salamanca, Alfonso, Argudo-Fernandez, Maria, Armengaud, Eric, Ata, Metin, Aubourg, Eric, Avila-Reese, Vladimir, Badenes, Carles, Bailey, Stephen, Balland, Christophe, Barger, Kathleen A., Barrera-Ballesteros, Jorge, Bartosz, Curtis, Bastien, Fabienne, Bates, Dominic, Baumgarten, Falk, Bautista, Julian, Beaton, Rachael, Beers, Timothy C., Belfiore, Francesco, Bender, Chad F., Bernardi, Mariangela, Bershady, Matthew A., Beutler, Florian, Bird, Jonathan C., Bizyaev, Dmitry, Blanc, Guillermo A., Blanton, Michael R., Blomqvist, Michael, Bolton, Adam S., Boquien, Mederic, Borissova, Jura, Bovy, Jo, Diaz, Christian Andres Bradna, Brandt, William Nielsen, Brinkmann, Jonathan, Brownstein, Joel R., Bundy, Kevin, Burgasser, Adam J., Burtin, Etienne, Busca, Nicolas G., Canas, Caleb I., Cano-Diaz, Mariana, Cappellari, Michele, Carrera, Ricardo, Casey, Andrew R., Sodi, Bernardo Cervantes, Chen, Yanping, Cherinka, Brian, Chiappini, Cristina, Choi, Peter Doohyun, Chojnowski, Drew, Chuang, Chia-Hsun, Chung, Haeun, Clerc, Nicolas, Cohen, Roger E., Comerford, Julia M., Comparat, Johan, Nascimento, Janaina Correa do, da Costa, Luiz, Cousinou, Marie-Claude, Covey, Kevin, Crane, Jeffrey D., Cruz-Gonzalez, Irene, Cunha, Katia, Ilha, Gabriele da Silva, Damke, Guillermo J., Darling, Jeremy, Davidson Jr., James W., Dawson, Kyle, Lizaola, Miguel Angel C. de Icaza, de la Macorra, Axel, de la Torre, Sylvain, De Lee, Nathan, Agathe, Victoria de Sainte, Machado, Alice Deconto, Dell'Agli, Flavia, Delubac, Timothee, Diamond-Stanic, Aleksandar M., Donor, John, Downes, Juan Jose, Drory, Niv, Bourboux, Helion du Mas des, Duckworth, Christopher J., Dwelly, Tom, Dyer, Jamie, Ebelke, Garrett, Eigenbrot, Arthur Davis, Eisenstein, Daniel J., Elsworth, Yvonne P., Emsellem, Eric, Eracleous, Mike, Erfanianfar, Ghazaleh, Escoffier, Stephanie, Fan, Xiaohui, Alvar, Emma Fernandez, Fernandez-Trincado, J. G., Cirolini, Rafael Fernando, Feuillet, Diane, Finoguenov, Alexis, Fleming, Scott W., Font-Ribera, Andreu, Freischlad, Gordon, Frinchaboy, Peter, Fu, Hai, Chew, Yilen Gomez Maqueo, Galbany, Lluis, Perez, Ana E. Garcia, Garcia-Dias, R., Garcia-Hernandez, D. A., Oehmichen, Luis Alberto Garma, Gaulme, Patrick, Gelfand, Joseph, Gil-Marin, Hector, Gillespie, Bruce A., Goddard, Daniel, Hernandez, Jonay I. Gonzalez, Gonzalez-Perez, Violeta, Grabowski, Kathleen, Green, Paul J., Grier, Catherine J., Gueguen, Alain, Guo, Hong, Guy, Julien, Hagen, Alex, Hall, Patrick, Harding, Paul, Hasselquist, Sten, Hawley, Suzanne, Hayes, Christian R., Hearty, Fred, Hekker, Saskia, Hernandez, Jesus, Toledo, Hector Hernandez, Hogg, David W., Holley-Bockelmann, Kelly, Holtzman, Jon, Hou, Jiamin, Hsieh, Bau-Ching, Hunt, Jason A. S., Hutchinson, Timothy A., Hwang, Ho Seong, Angel, Camilo Eduardo Jimenez, Johnson, Jennifer A., Jones, Amy, Jonsson, Henrik, Jullo, Eric, Khan, Fahim Sakil, Kinemuchi, Karen, Kirkby, David, Kirkpatrick IV, Charles C., Kitaura, Francisco-Shu, Knapp, Gillian R., Kneib, Jean-Paul, Kollmeier, Juna A., Lacerna, Ivan, Lane, Richard R., Lang, Dustin, Law, David R., Goff, Jean-Marc Le, Lee, Young-Bae, Li, Hongyu, Li, Cheng, Lian, Jianhui, Liang, Yu, Lima, Marcos, Lin, Lihwai, Long, Dan, Lucatello, Sara, Lundgren, Britt, Mackereth, J. Ted, MacLeod, Chelsea L., Mahadevan, Suvrath, Maia, Marcio Antonio Geimba, Majewski, Steven, Manchado, Arturo, Maraston, Claudia, Mariappan, Vivek, Marques-Chaves, Rui, Masseron, Thomas, Masters, Karen L., McDermid, Richard M., McGreer, Ian D., Melendez, Matthew, Meneses-Goytia, Sofia, Merloni, Andrea, Merrifield, Michael R., Meszaros, Szabolcs, Meza, Andres, Minchev, Ivan, Minniti, Dante, Mueller, Eva-Maria, Muller-Sanchez, Francisco, Muna, Demitri, Munoz, Ricardo R., Myers, Adam D., Nair, Preethi, Nandra, Kirpal, Ness, Melissa, Newman, Jeffrey A., Nichol, Robert C., Nidever, David L., Nitschelm, Christian, Noterdaeme, Pasquier, O'Connell, Julia, Oelkers, Ryan James, Oravetz, Audrey, Oravetz, Daniel, Ortiz, Erik Aquino, Osorio, Yeisson, Pace, Zach, Padilla, Nelson, Palanque-Delabrouille, Nathalie, Palicio, Pedro Alonso, Pan, Hsi-An, Pan, Kaike, Parikh, Taniya, Paris, Isabelle, Park, Changbom, Peirani, Sebastien, Pellejero-Ibanez, Marcos, Penny, Samantha, Percival, Will J., Perez-Fournon, Ismael, Petitjean, Patrick, Pieri, Matthew M., Pinsonneault, Marc, Pisani, Alice, Prada, Francisco, Prakash, Abhishek, Queiroz, Anna Barbara de Andrade, Raddick, M. Jordan, Raichoor, Anand, Rembold, Sandro Barboza, Richstein, Hannah, Riffel, Rogemar A., Riffel, Rogerio, Rix, Hans-Walter, Robin, Annie C., Torres, Sergio Rodriguez, Roman-Zuniga, Carlos, Ross, Ashley J., Rossi, Graziano, Ruan, John, Ruggeri, Rossana, Ruiz, Jose, Salvato, Mara, Sanchez, Ariel G., Sanchez, Sebastian F., Almeida, Jorge Sanchez, Sanchez-Gallego, Jose R., Rojas, Felipe Antonio Santana, Santiago, Basilio Xavier, Schiavon, Ricardo P., Schimoia, Jaderson S., Schlafly, Edward, Schlegel, David, Schneider, Donald P., Schuster, William J., Schwope, Axel, Seo, Hee-Jong, Serenelli, Aldo, Shen, Shiyin, Shen, Yue, Shetrone, Matthew, Shull, Michael, Aguirre, Victor Silva, Simon, Joshua D., Skrutskie, Mike, Slosar, Anze, Smethurst, Rebecca, Smith, Verne, Sobeck, Jennifer, Somers, Garrett, Souter, Barbara J., Souto, Diogo, Spindler, Ashley, Stark, David V., Stassun, Keivan, Steinmetz, Matthias, Stello, Dennis, Storchi-Bergmann, Thaisa, Streblyanska, Alina, Stringfellow, Guy, Suarez, Genaro, Sun, Jing, Szigeti, Laszlo, Taghizadeh-Popp, Manuchehr, Talbot, Michael S., Tang, Baitian, Tao, Charling, Tayar, Jamie, Tembe, Mita, Teske, Johanna, Thaker, Aniruddha R., Thomas, Daniel, Tissera, Patricia, Tojeiro, Rita, Tremonti, Christy, Troup, Nicholas W., Urry, Meg, Valenzuela, O., Bosch, Remco van den, Vargas-Gonzalez, Jaime, Vargas-Magana, Mariana, Vazquez, Jose Alberto, Villanova, Sandro, Vogt, Nicole, Wake, David, Wang, Yuting, Weaver, Benjamin Alan, Weijmans, Anne-Marie, Weinberg, David H., Westfall, Kyle B., Whelan, David G., Wilcots, Eric, Wild, Vivienne, Williams, Rob A., Wilson, John, Wood-Vasey, W. M., Wylezalek, Dominika, Xiao, Ting, Yan, Renbin, Yang, Meng, Ybarra, Jason E., Yeche, Christophe, Zakamska, Nadia, Zamora, Olga, Zarrouk, Pauline, Zasowski, Gail, Zhang, Kai, Zhao, Cheng, Zhao, Gong-Bo, Zheng, Zheng, Zhou, Zhi-Min, Zhu, Guangtun, Zinn, Joel C., and Zou, Hu
Subjects: Astrophysics - Astrophysics of Galaxies, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) has been in operation since July 2014. This paper describes the second data release from this phase, and the fourteenth from SDSS overall (making this, Data Release Fourteen or DR14). This release makes public data taken by SDSS-IV in its first two years of operation (July 2014-2016). Like all previous SDSS releases, DR14 is cumulative, including the most recent reductions and calibrations of all data taken by SDSS since the first phase began operations in 2000. New in DR14 is the first public release of data from the extended Baryon Oscillation Spectroscopic Survey (eBOSS); the first data from the second phase of the Apache Point Observatory (APO) Galactic Evolution Experiment (APOGEE-2), including stellar parameter estimates from an innovative data driven machine learning algorithm known as "The Cannon"; and almost twice as many data cubes from the Mapping Nearby Galaxies at APO (MaNGA) survey as were in the previous release (N = 2812 in total). This paper describes the location and format of the publicly available data from SDSS-IV surveys. We provide references to the important technical papers describing how these data have been taken (both targeting and observation details) and processed for scientific use. The SDSS website (www.sdss.org) has been updated for this release, and provides links to data downloads, as well as tutorials and examples of data use. SDSS-IV is planning to continue to collect astronomical data until 2020, and will be followed by SDSS-V., Comment: SDSS-IV collaboration alphabetical author data release paper. DR14 happened on 31st July 2017. 19 pages, 5 figures. Accepted by ApJS on 28th Nov 2017 (this is the "post-print" and "post-proofs" version; minor corrections only from v1, and most of errors found in proofs corrected)
Published: 2017
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6. Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe

Author: Blanton, Michael R., Bershady, Matthew A., Abolfathi, Bela, Albareti, Franco D., Prieto, Carlos Allende, Almeida, Andres, Alonso-García, Javier, Anders, Friedrich, Anderson, Scott F., Andrews, Brett, Aquino-Ortíz, Erik, Aragón-Salamanca, Alfonso, Argudo-Fernández, Maria, Armengaud, Eric, Aubourg, Eric, Avila-Reese, Vladimir, Badenes, Carles, Bailey, Stephen, Barger, Kathleen A., Barrera-Ballesteros, Jorge, Bartosz, Curtis, Bates, Dominic, Baumgarten, Falk, Bautista, Julian, Beaton, Rachael, Beers, Timothy C., Belfiore, Francesco, Bender, Chad F., Berlind, Andreas A., Bernardi, Mariangela, Beutler, Florian, Bird, Jonathan C., Bizyaev, Dmitry, Blanc, Guillermo A., Blomqvist, Michael, Bolton, Adam S., Boquien, Médéric, Borissova, Jura, Bosch, Remco van den, Bovy, Jo, Brandt, William N., Brinkmann, Jonathan, Brownstein, Joel R., Bundy, Kevin, Burgasser, Adam J., Burtin, Etienne, Busca, Nicolás G., Cappellari, Michele, Carigi, Maria Leticia Delgado, Carlberg, Joleen K., Rosell, Aurelio Carnero, Carrera, Ricardo, Cherinka, Brian, Cheung, Edmond, Chew, Yilen Gómez Maqueo, Chiappini, Cristina, Choi, Peter Doohyun, Chojnowski, Drew, Chuang, Chia-Hsun, Chung, Haeun, Cirolini, Rafael Fernando, Clerc, Nicolas, Cohen, Roger E., Comparat, Johan, da Costa, Luiz, Cousinou, Marie-Claude, Covey, Kevin, Crane, Jeffrey D., Croft, Rupert A. C., Cruz-Gonzalez, Irene, Cuadra, Daniel Garrido, Cunha, Katia, Damke, Guillermo J., Darling, Jeremy, Davies, Roger, Dawson, Kyle, de la Macorra, Axel, De Lee, Nathan, Delubac, Timothée, Di Mille, Francesco, Diamond-Stanic, Aleks, Cano-Díaz, Mariana, Donor, John, Downes, Juan José, Drory, Niv, Bourboux, Hélion du Mas des, Duckworth, Christopher J., Dwelly, Tom, Dyer, Jamie, Ebelke, Garrett, Eisenstein, Daniel J., Emsellem, Eric, Eracleous, Mike, Escoffier, Stephanie, Evans, Michael L., Fan, Xiaohui, Fernández-Alvar, Emma, Fernandez-Trincado, J. G., Feuillet, Diane K., Finoguenov, Alexis, Fleming, Scott W., Font-Ribera, Andreu, Fredrickson, Alexander, Freischlad, Gordon, Frinchaboy, Peter M., Galbany, Lluís, Garcia-Dias, R., García-Hernández, D. A., Gaulme, Patrick, Geisler, Doug, Gelfand, Joseph D., Gil-Marín, Héctor, Gillespie, Bruce A., Goddard, Daniel, Gonzalez-Perez, Violeta, Grabowski, Kathleen, Green, Paul J., Grier, Catherine J., Gunn, James E., Guo, Hong, Guy, Julien, Hagen, Alex, Hahn, ChangHoon, Hall, Matthew, Harding, Paul, Hasselquist, Sten, Hawley, Suzanne L., Hearty, Fred, Hernández, Jonay I. Gonzalez, Ho, Shirley, Hogg, David W., Holley-Bockelmann, Kelly, Holtzman, Jon A., Holzer, Parker H., Huehnerhoff, Joseph, Hutchinson, Timothy A., Hwang, Ho Seong, Ibarra-Medel, Héctor J., Ilha, Gabriele da Silva, Ivans, Inese I., Ivory, KeShawn, Jackson, Kelly, Jensen, Trey W., Johnson, Jennifer A., Jones, Amy, Jönsson, Henrik, Jullo, Eric, Kamble, Vikrant, Kinemuchi, Karen, Kirkby, David, Kitaura, Francisco-Shu, Klaene, Mark, Knapp, Gillian R., Kneib, Jean-Paul, Kollmeier, Juna A., Lacerna, Ivan, Lane, Richard R., Lang, Dustin, Law, David R., Lazarz, Daniel, Goff, Jean-Marc Le, Liang, Fu-Heng, Li, Cheng, LI, Hongyu, Lima, Marcos, Lin, Lihwai, Lin, Yen-Ting, de Lis, Sara Bertran, Liu, Chao, Lizaola, Miguel Angel C. de Icaza, Long, Dan, Lucatello, Sara, Lundgren, Britt, MacDonald, Nicholas K., Machado, Alice Deconto, MacLeod, Chelsea L., Mahadevan, Suvrath, Maia, Marcio Antonio Geimba, Maiolino, Roberto, Majewski, Steven R., Malanushenko, Elena, Malanushenko, Viktor, Manchado, Arturo, Mao, Shude, Maraston, Claudia, Marques-Chaves, Rui, Masters, Karen L., McBride, Cameron K., McDermid, Richard M., McGrath, Brianne, McGreer, Ian D., Peña, Nicolás Medina, Melendez, Matthew, Merloni, Andrea, Merrifield, Michael R., Meszaros, Szabolcs, Meza, Andres, Minchev, Ivan, Minniti, Dante, Miyaji, Takamitsu, More, Surhud, Mulchaey, John, Müller-Sánchez, Francisco, Muna, Demitri, Munoz, Ricardo R., Myers, Adam D., Nair, Preethi, Nandra, Kirpal, Nascimento, Janaina Correa do, Negrete, Alenka, Ness, Melissa, Newman, Jeffrey A., Nichol, Robert C., Nidever, David L., Nitschelm, Christian, Ntelis, Pierros, O'Connell, Julia E., Oelkers, Ryan J., Oravetz, Audrey, Oravetz, Daniel, Pace, Zach, Padilla, Nelson, Palanque-Delabrouille, Nathalie, Palicio, Pedro Alonso, Pan, Kaike, Parikh, Taniya, Pâris, Isabelle, Park, Changbom, Patten, Alim Y., Peirani, Sebastien, Pellejero-Ibanez, Marcos, Penny, Samantha, Percival, Will J., Perez-Fournon, Ismael, Petitjean, Patrick, Pieri, Matthew M., Pinsonneault, Marc, Pisani, Alice, Poleski, Radosław, Prada, Francisco, Prakash, Abhishek, Queiroz, Anna Bárbara de Andrade, Raddick, M. Jordan, Raichoor, Anand, Rembold, Sandro Barboza, Richstein, Hannah, Riffel, Rogemar A., Riffel, Rogério, Rix, Hans-Walter, Robin, Annie C., Rockosi, Constance M., Rodríguez-Torres, Sergio, Roman-Lopes, A., Román-Zúñiga, Carlos, Rosado, Margarita, Ross, Ashley J., Rossi, Graziano, Ruan, John, Ruggeri, Rossana, Rykoff, Eli S., Salazar-Albornoz, Salvador, Salvato, Mara, Sánchez, Ariel G., Aguado, David Sánchez, Sánchez-Gallego, José R., Santana, Felipe A., Santiago, Basílio Xavier, Sayres, Conor, Schiavon, Ricardo P., Schimoia, Jaderson da Silva, Schlafly, Edward F., Schlegel, David J., Schneider, Donald P., Schultheis, Mathias, Schuster, William J., Schwope, Axel, Seo, Hee-Jong, Shao, Zhengyi, Shen, Shiyin, Shetrone, Matthew, Shull, Michael, Simon, Joshua D., Skinner, Danielle, Skrutskie, M. F., Slosar, Anže, Smith, Verne V., Sobeck, Jennifer S., Sobreira, Flavia, Somers, Garrett, Souto, Diogo, Stark, David V., Stassun, Keivan, Stauffer, Fritz, Steinmetz, Matthias, Storchi-Bergmann, Thaisa, Streblyanska, Alina, Stringfellow, Guy S., Suárez, Genaro, Sun, Jing, Suzuki, Nao, Szigeti, Laszlo, Taghizadeh-Popp, Manuchehr, Tang, Baitian, Tao, Charling, Tayar, Jamie, Tembe, Mita, Teske, Johanna, Thakar, Aniruddha R., Thomas, Daniel, Thompson, Benjamin A., Tinker, Jeremy L., Tissera, Patricia, Tojeiro, Rita, Toledo, Hector Hernandez, de la Torre, Sylvain, Tremonti, Christy, Troup, Nicholas W., Valenzuela, Octavio, Valpuesta, Inma Martinez, Vargas-González, Jaime, Vargas-Magaña, Mariana, Vazquez, Jose Alberto, Villanova, Sandro, Vivek, M., Vogt, Nicole, Wake, David, Walterbos, Rene, Wang, Yuting, Weaver, Benjamin Alan, Weijmans, Anne-Marie, Weinberg, David H., Westfall, Kyle B., Whelan, David G., Wild, Vivienne, Wilson, John, Wood-Vasey, W. M., Wylezalek, Dominika, Xiao, Ting, Yan, Renbin, Yang, Meng, Ybarra, Jason E., Yèche, Christophe, Zakamska, Nadia, Zamora, Olga, Zarrouk, Pauline, Zasowski, Gail, Zhang, Kai, Zhao, Gong-Bo, Zheng, Zheng, Zhou, Zhi-Min, Zhu, Guangtun B., Zoccali, Manuela, and Zou, Hu
Subjects: Astrophysics - Astrophysics of Galaxies
Abstract: We describe the Sloan Digital Sky Survey IV (SDSS-IV), a project encompassing three major spectroscopic programs. The Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2) is observing hundreds of thousands of Milky Way stars at high resolution and high signal-to-noise ratio in the near-infrared. The Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey is obtaining spatially-resolved spectroscopy for thousands of nearby galaxies (median redshift of z = 0.03). The extended Baryon Oscillation Spectroscopic Survey (eBOSS) is mapping the galaxy, quasar, and neutral gas distributions between redshifts z = 0.6 and 3.5 to constrain cosmology using baryon acoustic oscillations, redshift space distortions, and the shape of the power spectrum. Within eBOSS, we are conducting two major subprograms: the SPectroscopic IDentification of eROSITA Sources (SPIDERS), investigating X-ray AGN and galaxies in X-ray clusters, and the Time Domain Spectroscopic Survey (TDSS), obtaining spectra of variable sources. All programs use the 2.5-meter Sloan Foundation Telescope at Apache Point Observatory; observations there began in Summer 2014. APOGEE-2 also operates a second near-infrared spectrograph at the 2.5-meter du Pont Telescope at Las Campanas Observatory, with observations beginning in early 2017. Observations at both facilities are scheduled to continue through 2020. In keeping with previous SDSS policy, SDSS-IV provides regularly scheduled public data releases; the first one, Data Release 13, was made available in July 2016., Comment: Published in Astronomical Journal
Published: 2017
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7. Exploring cosmic homogeneity with the BOSS DR12 galaxy sample

Author: Ntelis, Pierros, Hamilton, Jean-Christophe, Goff, Jean-Marc Le, Busca, Nicolas Guillermo, Aubourg, Eric, Laurent, Pierre, Rich, James, Burtin, Etienne, Bourboux, Hélion du Mas des, Delabrouille, Nathalie Palanque, Yeche, Christophe, Hogg, David W., Myers, Adam, Tinker, Jeremy, Bautista, Julian, Delubac, Timothée, Rossi, Graziano, Toheiro, Donald P. Schneider Rita, and Vargas-Magaña, Mariana
Subjects: Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: In this study, we probe the transition to cosmic homogeneity in the Large Scale Structure (LSS) of the Universe using the CMASS galaxy sample of BOSS spectroscopic survey which covers the largest effective volume to date, $3\ h^{-3}\ \mathrm{Gpc}^3$ at $0.43 \leq z \leq 0.7$. We study the scaled counts-in-spheres, $\mathcal{N}(2.97$ for $r>\mathcal{R}_H$, we find $\mathcal{R}_H = (63.3\pm0.7) \ h^{-1}\ \mathrm{Mpc}$, in agreement at the percentage level with the predictions of the $\Lambda$CDM model $\mathcal{R}_H=62.0\ h^{-1}\ \mathrm{Mpc}$. Thanks to the large cosmic depth of the survey, we investigate the redshift evolution of the transition to homogeneity scale and find agreement with the $\Lambda$CDM prediction. Finally, we find that $\mathcal{D}_2$ is compatible with $3$ at scales larger than $300\ h^{-1}\ $Mpc in all redshift bins. These results consolidate the Cosmological Principle and represent a precise consistency test of the $\Lambda CDM$ model., Comment: Accepted to JCAP, 27 pages
Published: 2017
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8. Measurement of BAO correlations at $z=2.3$ with SDSS DR12 \lya-Forests

Author: Bautista, Julian E., Busca, Nicolás G., Guy, Julien, Rich, James, Blomqvist, Michael, Bourboux, Hélion du Mas des, Pieri, Matthew M., Font-Ribera, Andreu, Bailey, Stephen, Delubac, Timothée, Kirkby, David, Goff, Jean-Marc Le, Margala, Daniel, Slosar, Anže, Vazquez, Jose Alberto, Brownstein, Joel R., Dawson, Kyle S., Eisenstein, Daniel J., Miralda-Escudé, Jordi, Noterdaeme, Pasquier, Palanque-Delabrouille, Nathalie, Pâris, Isabelle, Petitjean, Patrick, Ross, Nicholas P., Schneider, Donald P., Weinberg, David H., and Yèche, Christophe
Subjects: Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We use flux-transmission correlations in \Lya forests to measure the imprint of baryon acoustic oscillations (BAO). The study uses spectra of 157,783 quasars in the redshift range $2.1\le z \le 3.5$ from the Sloan Digital Sky Survey (SDSS) Data Release 12 (DR12). Besides the statistical improvements on our previous studies using SDSS DR9 and DR11, we have implemented numerous improvements in the analysis procedure, allowing us to construct a physical model of the correlation function and to investigate potential systematic errors in the determination of the BAO peak position. The Hubble distance, $\DHub=c/H(z)$, relative to the sound horizon is $\DHub(z=2.33)/r_d=9.07 \pm 0.31$. The best-determined combination of comoving angular-diameter distance, $\DM$, and the Hubble distance is found to be $\DHub^{0.7}\DM^{0.3}/r_d=13.94\pm0.35$. This value is $1.028\pm0.026$ times the prediction of the flat-\lcdm model consistent with the cosmic microwave background (CMB) anisotropy spectrum. The errors include marginalization over the effects of unidentified high-density absorption systems and fluctuations in ultraviolet ionizing radiation. Independently of the CMB measurements, the combination of our results and other BAO observations determine the open-\lcdm density parameters to be $\om=0.296 \pm 0.029$, $\ol=0.699 \pm 0.100$ and $\Omega_k = -0.002 \pm 0.119$., Comment: 22 pages, accepted A&A
Published: 2017
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9. The DESI Experiment Part I: Science,Targeting, and Survey Design

Author: DESI Collaboration, Aghamousa, Amir, Aguilar, Jessica, Ahlen, Steve, Alam, Shadab, Allen, Lori E., Prieto, Carlos Allende, Annis, James, Bailey, Stephen, Balland, Christophe, Ballester, Otger, Baltay, Charles, Beaufore, Lucas, Bebek, Chris, Beers, Timothy C., Bell, Eric F., Bernal, José Luis, Besuner, Robert, Beutler, Florian, Blake, Chris, Bleuler, Hannes, Blomqvist, Michael, Blum, Robert, Bolton, Adam S., Briceno, Cesar, Brooks, David, Brownstein, Joel R., Buckley-Geer, Elizabeth, Burden, Angela, Burtin, Etienne, Busca, Nicolas G., Cahn, Robert N., Cai, Yan-Chuan, Cardiel-Sas, Laia, Carlberg, Raymond G., Carton, Pierre-Henri, Casas, Ricard, Castander, Francisco J., Cervantes-Cota, Jorge L., Claybaugh, Todd M., Close, Madeline, Coker, Carl T., Cole, Shaun, Comparat, Johan, Cooper, Andrew P., Cousinou, M. -C., Crocce, Martin, Cuby, Jean-Gabriel, Cunningham, Daniel P., Davis, Tamara M., Dawson, Kyle S., de la Macorra, Axel, De Vicente, Juan, Delubac, Timothée, Derwent, Mark, Dey, Arjun, Dhungana, Govinda, Ding, Zhejie, Doel, Peter, Duan, Yutong T., Ealet, Anne, Edelstein, Jerry, Eftekharzadeh, Sarah, Eisenstein, Daniel J., Elliott, Ann, Escoffier, Stéphanie, Evatt, Matthew, Fagrelius, Parker, Fan, Xiaohui, Fanning, Kevin, Farahi, Arya, Farihi, Jay, Favole, Ginevra, Feng, Yu, Fernandez, Enrique, Findlay, Joseph R., Finkbeiner, Douglas P., Fitzpatrick, Michael J., Flaugher, Brenna, Flender, Samuel, Font-Ribera, Andreu, Forero-Romero, Jaime E., Fosalba, Pablo, Frenk, Carlos S., Fumagalli, Michele, Gaensicke, Boris T., Gallo, Giuseppe, Garcia-Bellido, Juan, Gaztanaga, Enrique, Fusillo, Nicola Pietro Gentile, Gerard, Terry, Gershkovich, Irena, Giannantonio, Tommaso, Gillet, Denis, Gonzalez-de-Rivera, Guillermo, Gonzalez-Perez, Violeta, Gott, Shelby, Graur, Or, Gutierrez, Gaston, Guy, Julien, Habib, Salman, Heetderks, Henry, Heetderks, Ian, Heitmann, Katrin, Hellwing, Wojciech A., Herrera, David A., Ho, Shirley, Holland, Stephen, Honscheid, Klaus, Huff, Eric, Hutchinson, Timothy A., Huterer, Dragan, Hwang, Ho Seong, Laguna, Joseph Maria Illa, Ishikawa, Yuzo, Jacobs, Dianna, Jeffrey, Niall, Jelinsky, Patrick, Jennings, Elise, Jiang, Linhua, Jimenez, Jorge, Johnson, Jennifer, Joyce, Richard, Jullo, Eric, Juneau, Stéphanie, Kama, Sami, Karcher, Armin, Karkar, Sonia, Kehoe, Robert, Kennamer, Noble, Kent, Stephen, Kilbinger, Martin, Kim, Alex G., Kirkby, David, Kisner, Theodore, Kitanidis, Ellie, Kneib, Jean-Paul, Koposov, Sergey, Kovacs, Eve, Koyama, Kazuya, Kremin, Anthony, Kron, Richard, Kronig, Luzius, Kueter-Young, Andrea, Lacey, Cedric G., Lafever, Robin, Lahav, Ofer, Lambert, Andrew, Lampton, Michael, Landriau, Martin, Lang, Dustin, Lauer, Tod R., Goff, Jean-Marc Le, Guillou, Laurent Le, Van Suu, Auguste Le, Lee, Jae Hyeon, Lee, Su-Jeong, Leitner, Daniela, Lesser, Michael, Levi, Michael E., L'Huillier, Benjamin, Li, Baojiu, Liang, Ming, Lin, Huan, Linder, Eric, Loebman, Sarah R., Lukić, Zarija, Ma, Jun, MacCrann, Niall, Magneville, Christophe, Makarem, Laleh, Manera, Marc, Manser, Christopher J., Marshall, Robert, Martini, Paul, Massey, Richard, Matheson, Thomas, McCauley, Jeremy, McDonald, Patrick, McGreer, Ian D., Meisner, Aaron, Metcalfe, Nigel, Miller, Timothy N., Miquel, Ramon, Moustakas, John, Myers, Adam, Naik, Milind, Newman, Jeffrey A., Nichol, Robert C., Nicola, Andrina, da Costa, Luiz Nicolati, Nie, Jundan, Niz, Gustavo, Norberg, Peder, Nord, Brian, Norman, Dara, Nugent, Peter, O'Brien, Thomas, Oh, Minji, Olsen, Knut A. G., Padilla, Cristobal, Padmanabhan, Hamsa, Padmanabhan, Nikhil, Palanque-Delabrouille, Nathalie, Palmese, Antonella, Pappalardo, Daniel, Pâris, Isabelle, Park, Changbom, Patej, Anna, Peacock, John A., Peiris, Hiranya V., Peng, Xiyan, Percival, Will J., Perruchot, Sandrine, Pieri, Matthew M., Pogge, Richard, Pollack, Jennifer E., Poppett, Claire, Prada, Francisco, Prakash, Abhishek, Probst, Ronald G., Rabinowitz, David, Raichoor, Anand, Ree, Chang Hee, Refregier, Alexandre, Regal, Xavier, Reid, Beth, Reil, Kevin, Rezaie, Mehdi, Rockosi, Constance M., Roe, Natalie, Ronayette, Samuel, Roodman, Aaron, Ross, Ashley J., Ross, Nicholas P., Rossi, Graziano, Rozo, Eduardo, Ruhlmann-Kleider, Vanina, Rykoff, Eli S., Sabiu, Cristiano, Samushia, Lado, Sanchez, Eusebio, Sanchez, Javier, Schlegel, David J., Schneider, Michael, Schubnell, Michael, Secroun, Aurélia, Seljak, Uros, Seo, Hee-Jong, Serrano, Santiago, Shafieloo, Arman, Shan, Huanyuan, Sharples, Ray, Sholl, Michael J., Shourt, William V., Silber, Joseph H., Silva, David R., Sirk, Martin M., Slosar, Anze, Smith, Alex, Smoot, George F., Som, Debopam, Song, Yong-Seon, Sprayberry, David, Staten, Ryan, Stefanik, Andy, Tarle, Gregory, Tie, Suk Sien, Tinker, Jeremy L., Tojeiro, Rita, Valdes, Francisco, Valenzuela, Octavio, Valluri, Monica, Vargas-Magana, Mariana, Verde, Licia, Walker, Alistair R., Wang, Jiali, Wang, Yuting, Weaver, Benjamin A., Weaverdyck, Curtis, Wechsler, Risa H., Weinberg, David H., White, Martin, Yang, Qian, Yeche, Christophe, Zhang, Tianmeng, Zhao, Gong-Bo, Zheng, Yi, Zhou, Xu, Zhou, Zhimin, Zhu, Yaling, Zou, Hu, and Zu, Ying
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: DESI (Dark Energy Spectroscopic Instrument) is a Stage IV ground-based dark energy experiment that will study baryon acoustic oscillations (BAO) and the growth of structure through redshift-space distortions with a wide-area galaxy and quasar redshift survey. To trace the underlying dark matter distribution, spectroscopic targets will be selected in four classes from imaging data. We will measure luminous red galaxies up to $z=1.0$. To probe the Universe out to even higher redshift, DESI will target bright [O II] emission line galaxies up to $z=1.7$. Quasars will be targeted both as direct tracers of the underlying dark matter distribution and, at higher redshifts ($ 2.1 < z < 3.5$), for the Ly-$\alpha$ forest absorption features in their spectra, which will be used to trace the distribution of neutral hydrogen. When moonlight prevents efficient observations of the faint targets of the baseline survey, DESI will conduct a magnitude-limited Bright Galaxy Survey comprising approximately 10 million galaxies with a median $z\approx 0.2$. In total, more than 30 million galaxy and quasar redshifts will be obtained to measure the BAO feature and determine the matter power spectrum, including redshift space distortions.
Published: 2016

10. The DESI Experiment Part II: Instrument Design

Author: DESI Collaboration, Aghamousa, Amir, Aguilar, Jessica, Ahlen, Steve, Alam, Shadab, Allen, Lori E., Prieto, Carlos Allende, Annis, James, Bailey, Stephen, Balland, Christophe, Ballester, Otger, Baltay, Charles, Beaufore, Lucas, Bebek, Chris, Beers, Timothy C., Bell, Eric F., Bernal, José Luis, Besuner, Robert, Beutler, Florian, Blake, Chris, Bleuler, Hannes, Blomqvist, Michael, Blum, Robert, Bolton, Adam S., Briceno, Cesar, Brooks, David, Brownstein, Joel R., Buckley-Geer, Elizabeth, Burden, Angela, Burtin, Etienne, Busca, Nicolas G., Cahn, Robert N., Cai, Yan-Chuan, Cardiel-Sas, Laia, Carlberg, Raymond G., Carton, Pierre-Henri, Casas, Ricard, Castander, Francisco J., Cervantes-Cota, Jorge L., Claybaugh, Todd M., Close, Madeline, Coker, Carl T., Cole, Shaun, Comparat, Johan, Cooper, Andrew P., Cousinou, M. -C., Crocce, Martin, Cuby, Jean-Gabriel, Cunningham, Daniel P., Davis, Tamara M., Dawson, Kyle S., de la Macorra, Axel, De Vicente, Juan, Delubac, Timothée, Derwent, Mark, Dey, Arjun, Dhungana, Govinda, Ding, Zhejie, Doel, Peter, Duan, Yutong T., Ealet, Anne, Edelstein, Jerry, Eftekharzadeh, Sarah, Eisenstein, Daniel J., Elliott, Ann, Escoffier, Stéphanie, Evatt, Matthew, Fagrelius, Parker, Fan, Xiaohui, Fanning, Kevin, Farahi, Arya, Farihi, Jay, Favole, Ginevra, Feng, Yu, Fernandez, Enrique, Findlay, Joseph R., Finkbeiner, Douglas P., Fitzpatrick, Michael J., Flaugher, Brenna, Flender, Samuel, Font-Ribera, Andreu, Forero-Romero, Jaime E., Fosalba, Pablo, Frenk, Carlos S., Fumagalli, Michele, Gaensicke, Boris T., Gallo, Giuseppe, Garcia-Bellido, Juan, Gaztanaga, Enrique, Fusillo, Nicola Pietro Gentile, Gerard, Terry, Gershkovich, Irena, Giannantonio, Tommaso, Gillet, Denis, Gonzalez-de-Rivera, Guillermo, Gonzalez-Perez, Violeta, Gott, Shelby, Graur, Or, Gutierrez, Gaston, Guy, Julien, Habib, Salman, Heetderks, Henry, Heetderks, Ian, Heitmann, Katrin, Hellwing, Wojciech A., Herrera, David A., Ho, Shirley, Holland, Stephen, Honscheid, Klaus, Huff, Eric, Hutchinson, Timothy A., Huterer, Dragan, Hwang, Ho Seong, Laguna, Joseph Maria Illa, Ishikawa, Yuzo, Jacobs, Dianna, Jeffrey, Niall, Jelinsky, Patrick, Jennings, Elise, Jiang, Linhua, Jimenez, Jorge, Johnson, Jennifer, Joyce, Richard, Jullo, Eric, Juneau, Stéphanie, Kama, Sami, Karcher, Armin, Karkar, Sonia, Kehoe, Robert, Kennamer, Noble, Kent, Stephen, Kilbinger, Martin, Kim, Alex G., Kirkby, David, Kisner, Theodore, Kitanidis, Ellie, Kneib, Jean-Paul, Koposov, Sergey, Kovacs, Eve, Koyama, Kazuya, Kremin, Anthony, Kron, Richard, Kronig, Luzius, Kueter-Young, Andrea, Lacey, Cedric G., Lafever, Robin, Lahav, Ofer, Lambert, Andrew, Lampton, Michael, Landriau, Martin, Lang, Dustin, Lauer, Tod R., Goff, Jean-Marc Le, Guillou, Laurent Le, Van Suu, Auguste Le, Lee, Jae Hyeon, Lee, Su-Jeong, Leitner, Daniela, Lesser, Michael, Levi, Michael E., L'Huillier, Benjamin, Li, Baojiu, Liang, Ming, Lin, Huan, Linder, Eric, Loebman, Sarah R., Lukić, Zarija, Ma, Jun, MacCrann, Niall, Magneville, Christophe, Makarem, Laleh, Manera, Marc, Manser, Christopher J., Marshall, Robert, Martini, Paul, Massey, Richard, Matheson, Thomas, McCauley, Jeremy, McDonald, Patrick, McGreer, Ian D., Meisner, Aaron, Metcalfe, Nigel, Miller, Timothy N., Miquel, Ramon, Moustakas, John, Myers, Adam, Naik, Milind, Newman, Jeffrey A., Nichol, Robert C., Nicola, Andrina, da Costa, Luiz Nicolati, Nie, Jundan, Niz, Gustavo, Norberg, Peder, Nord, Brian, Norman, Dara, Nugent, Peter, O'Brien, Thomas, Oh, Minji, Olsen, Knut A. G., Padilla, Cristobal, Padmanabhan, Hamsa, Padmanabhan, Nikhil, Palanque-Delabrouille, Nathalie, Palmese, Antonella, Pappalardo, Daniel, Pâris, Isabelle, Park, Changbom, Patej, Anna, Peacock, John A., Peiris, Hiranya V., Peng, Xiyan, Percival, Will J., Perruchot, Sandrine, Pieri, Matthew M., Pogge, Richard, Pollack, Jennifer E., Poppett, Claire, Prada, Francisco, Prakash, Abhishek, Probst, Ronald G., Rabinowitz, David, Raichoor, Anand, Ree, Chang Hee, Refregier, Alexandre, Regal, Xavier, Reid, Beth, Reil, Kevin, Rezaie, Mehdi, Rockosi, Constance M., Roe, Natalie, Ronayette, Samuel, Roodman, Aaron, Ross, Ashley J., Ross, Nicholas P., Rossi, Graziano, Rozo, Eduardo, Ruhlmann-Kleider, Vanina, Rykoff, Eli S., Sabiu, Cristiano, Samushia, Lado, Sanchez, Eusebio, Sanchez, Javier, Schlegel, David J., Schneider, Michael, Schubnell, Michael, Secroun, Aurélia, Seljak, Uros, Seo, Hee-Jong, Serrano, Santiago, Shafieloo, Arman, Shan, Huanyuan, Sharples, Ray, Sholl, Michael J., Shourt, William V., Silber, Joseph H., Silva, David R., Sirk, Martin M., Slosar, Anze, Smith, Alex, Smoot, George F., Som, Debopam, Song, Yong-Seon, Sprayberry, David, Staten, Ryan, Stefanik, Andy, Tarle, Gregory, Tie, Suk Sien, Tinker, Jeremy L., Tojeiro, Rita, Valdes, Francisco, Valenzuela, Octavio, Valluri, Monica, Vargas-Magana, Mariana, Verde, Licia, Walker, Alistair R., Wang, Jiali, Wang, Yuting, Weaver, Benjamin A., Weaverdyck, Curtis, Wechsler, Risa H., Weinberg, David H., White, Martin, Yang, Qian, Yeche, Christophe, Zhang, Tianmeng, Zhao, Gong-Bo, Zheng, Yi, Zhou, Xu, Zhou, Zhimin, Zhu, Yaling, Zou, Hu, and Zu, Ying
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: DESI (Dark Energy Spectropic Instrument) is a Stage IV ground-based dark energy experiment that will study baryon acoustic oscillations and the growth of structure through redshift-space distortions with a wide-area galaxy and quasar redshift survey. The DESI instrument is a robotically-actuated, fiber-fed spectrograph capable of taking up to 5,000 simultaneous spectra over a wavelength range from 360 nm to 980 nm. The fibers feed ten three-arm spectrographs with resolution $R= \lambda/\Delta\lambda$ between 2000 and 5500, depending on wavelength. The DESI instrument will be used to conduct a five-year survey designed to cover 14,000 deg$^2$. This powerful instrument will be installed at prime focus on the 4-m Mayall telescope in Kitt Peak, Arizona, along with a new optical corrector, which will provide a three-degree diameter field of view. The DESI collaboration will also deliver a spectroscopic pipeline and data management system to reduce and archive all data for eventual public use.
Published: 2016

11. The Fourteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the Extended Baryon Oscillation Spectroscopic Survey and from the Second Phase of the Apache Point Observatory Galactic Evolution Experiment

Author: Abolfathi, Bela, Aguado, DS, Aguilar, Gabriela, Prieto, Carlos Allende, Almeida, Andres, Ananna, Tonima Tasnim, Anders, Friedrich, Anderson, Scott F, Andrews, Brett H, Anguiano, Borja, Aragón-Salamanca, Alfonso, Argudo-Fernández, Maria, Armengaud, Eric, Ata, Metin, Aubourg, Eric, Avila-Reese, Vladimir, Badenes, Carles, Bailey, Stephen, Balland, Christophe, Barger, Kathleen A, Barrera-Ballesteros, Jorge, Bartosz, Curtis, Bastien, Fabienne, Bates, Dominic, Baumgarten, Falk, Bautista, Julian, Beaton, Rachael, Beers, Timothy C, Belfiore, Francesco, Bender, Chad F, Bernardi, Mariangela, Bershady, Matthew A, Beutler, Florian, Bird, Jonathan C, Bizyaev, Dmitry, Blanc, Guillermo A, Blanton, Michael R, Blomqvist, Michael, Bolton, Adam S, Boquien, Médéric, Borissova, Jura, Bovy, Jo, Diaz, Christian Andres Bradna, Brandt, William Nielsen, Brinkmann, Jonathan, Brownstein, Joel R, Bundy, Kevin, Burgasser, Adam J, Burtin, Etienne, Busca, Nicolás G, Cañas, Caleb I, Cano-Díaz, Mariana, Cappellari, Michele, Carrera, Ricardo, Casey, Andrew R, Sodi, Bernardo Cervantes, Chen, Yanping, Cherinka, Brian, Chiappini, Cristina, Choi, Peter Doohyun, Chojnowski, Drew, Chuang, Chia-Hsun, Chung, Haeun, Clerc, Nicolas, Cohen, Roger E, Comerford, Julia M, Comparat, Johan, do Nascimento, Janaina Correa, da Costa, Luiz, Cousinou, Marie-Claude, Covey, Kevin, Crane, Jeffrey D, Cruz-Gonzalez, Irene, Cunha, Katia, da Silva Ilha, Gabriele, Damke, Guillermo J, Darling, Jeremy, Davidson, James W, Dawson, Kyle, de Icaza Lizaola, Miguel Angel C, de la Macorra, Axel, de la Torre, Sylvain, De Lee, Nathan, de Sainte Agathe, Victoria, Machado, Alice Deconto, Dell’Agli, Flavia, Delubac, Timothée, Diamond-Stanic, Aleksandar M, Donor, John, Downes, Juan José, Drory, Niv, du Mas des Bourboux, Hélion, Duckworth, Christopher J, Dwelly, Tom, Dyer, Jamie, Ebelke, Garrett, Eigenbrot, Arthur Davis, Eisenstein, Daniel J, Elsworth, Yvonne P, and Emsellem, Eric
Subjects: Astronomical Sciences, Physical Sciences, atlases, catalogs, surveys, astro-ph.GA, astro-ph.IM, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural), Astronomy & Astrophysics, Astronomical sciences
Abstract: The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) has been in operation since 2014 July. This paper describes the second data release from this phase, and the 14th from SDSS overall (making this Data Release Fourteen or DR14). This release makes the data taken by SDSS-IV in its first two years of operation (2014-2016 July) public. Like all previous SDSS releases, DR14 is cumulative, including the most recent reductions and calibrations of all data taken by SDSS since the first phase began operations in 2000. New in DR14 is the first public release of data from the extended Baryon Oscillation Spectroscopic Survey; the first data from the second phase of the Apache Point Observatory (APO) Galactic Evolution Experiment (APOGEE-2), including stellar parameter estimates from an innovative data-driven machine-learning algorithm known as "The Cannon"; and almost twice as many data cubes from the Mapping Nearby Galaxies at APO (MaNGA) survey as were in the previous release (N = 2812 in total). This paper describes the location and format of the publicly available data from the SDSS-IV surveys. We provide references to the important technical papers describing how these data have been taken (both targeting and observation details) and processed for scientific use. The SDSS web site (www.sdss.org) has been updated for this release and provides links to data downloads, as well as tutorials and examples of data use. SDSS-IV is planning to continue to collect astronomical data until 2020 and will be followed by SDSS-V.
Published: 2018

12. The 13th Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-IV Survey Mapping Nearby Galaxies at Apache Point Observatory

Author: Albareti, Franco D, Prieto, Carlos Allende, Almeida, Andres, Anders, Friedrich, Anderson, Scott, Andrews, Brett H, Aragón-Salamanca, Alfonso, Argudo-Fernández, Maria, Armengaud, Eric, Aubourg, Eric, Avila-Reese, Vladimir, Badenes, Carles, Bailey, Stephen, Barbuy, Beatriz, Barger, Kat, Barrera-Ballesteros, Jorge, Bartosz, Curtis, Basu, Sarbani, Bates, Dominic, Battaglia, Giuseppina, Baumgarten, Falk, Baur, Julien, Bautista, Julian, Beers, Timothy C, Belfiore, Francesco, Bershady, Matthew, de Lis, Sara Bertran, Bird, Jonathan C, Bizyaev, Dmitry, Blanc, Guillermo A, Blanton, Michael, Blomqvist, Michael, Bolton, Adam S, Borissova, J, Bovy, Jo, Brandt, William Nielsen, Brinkmann, Jonathan, Brownstein, Joel R, Bundy, Kevin, Burtin, Etienne, Busca, Nicolás G, Chavez, Hugo Orlando Camacho, Díaz, M Cano, Cappellari, Michele, Carrera, Ricardo, Chen, Yanping, Cherinka, Brian, Cheung, Edmond, Chiappini, Cristina, Chojnowski, Drew, Chuang, Chia-Hsun, Chung, Haeun, Cirolini, Rafael Fernando, Clerc, Nicolas, Cohen, Roger E, Comerford, Julia M, Comparat, Johan, do Nascimento, Janaina Correa, Cousinou, Marie-Claude, Covey, Kevin, Crane, Jeffrey D, Croft, Rupert, Cunha, Katia, Darling, Jeremy, Davidson, James W, Dawson, Kyle, Da Costa, Luiz, Da Silva Ilha, Gabriele, Machado, Alice Deconto, Delubac, Timothée, De Lee, Nathan, De la Macorra, Axel, De la Torre, Sylvain, Diamond-Stanic, Aleksandar M, Donor, John, Downes, Juan Jose, Drory, Niv, Du, Cheng, Du Mas des Bourboux, Hélion, Dwelly, Tom, Ebelke, Garrett, Eigenbrot, Arthur, Eisenstein, Daniel J, Elsworth, Yvonne P, Emsellem, Eric, Eracleous, Michael, Escoffier, Stephanie, Evans, Michael L, Falcón-Barroso, Jesús, Fan, Xiaohui, Favole, Ginevra, Fernandez-Alvar, Emma, Fernandez-Trincado, JG, Feuillet, Diane, Fleming, Scott W, Font-Ribera, Andreu, Freischlad, Gordon, Frinchaboy, Peter, Fu, Hai, and Gao, Yang
Subjects: Astronomical Sciences, Physical Sciences, atlases, catalogs, surveys, astro-ph.GA, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural), Astronomy & Astrophysics, Astronomical sciences
Abstract: The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) began observations in 2014 July. It pursues three core programs: the Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2), Mapping Nearby Galaxies at APO (MaNGA), and the Extended Baryon Oscillation Spectroscopic Survey (eBOSS). As well as its core program, eBOSS contains two major subprograms: the Time Domain Spectroscopic Survey (TDSS) and the SPectroscopic IDentification of ERosita Sources (SPIDERS). This paper describes the first data release from SDSS-IV, Data Release 13 (DR13). DR13 makes publicly available the first 1390 spatially resolved integral field unit observations of nearby galaxies from MaNGA. It includes new observations from eBOSS, completing the Sloan Extended QUasar, Emission-line galaxy, Luminous red galaxy Survey (SEQUELS), which also targeted variability-selected objects and X-ray-selected objects. DR13 includes new reductions of the SDSS-III BOSS data, improving the spectrophotometric calibration and redshift classification, and new reductions of the SDSS-III APOGEE-1 data, improving stellar parameters for dwarf stars and cooler stars. DR13 provides more robust and precise photometric calibrations. Value-added target catalogs relevant for eBOSS, TDSS, and SPIDERS and an updated red-clump catalog for APOGEE are also available. This paper describes the location and format of the data and provides references to important technical papers. The SDSS web site, http://www.sdss.org, provides links to the data, tutorials, examples of data access, and extensive documentation of the reduction and analysis procedures. DR13 is the first of a scheduled set that will contain new data and analyses from the planned ∼6 yr operations of SDSS-IV.
Published: 2017

13. The Thirteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-IV Survey MApping Nearby Galaxies at Apache Point Observatory

Author: SDSS Collaboration, Albareti, Franco D., Prieto, Carlos Allende, Almeida, Andres, Anders, Friedrich, Anderson, Scott, Andrews, Brett H., Aragon-Salamanca, Alfonso, Argudo-Fernandez, Maria, Armengaud, Eric, Aubourg, Eric, Avila-Reese, Vladimir, Badenes, Carles, Bailey, Stephen, Barbuy, Beatriz, Barger, Kat, Barrera-Ballesteros, Jorge, Bartosz, Curtis, Basu, Sarbani, Bates, Dominic, Battaglia, Giuseppina, Baumgarten, Falk, Baur, Julien, Bautista, Julian, Beers, Timothy C., Belfiore, Francesco, Bershady, Matthew, de Lis, Sara Bertran, Bird, Jonathan C., Bizyaev, Dmitry, Blanc, Guillermo A., Blanton, Michael, Blomqvist, Michael, Bolton, Adam S., Borissova, J., Bovy, Jo, Brandt, William Nielsen, Brinkmann, Jonathan, Brownstein, Joel R., Bundy, Kevin, Burtin, Etienne, Busca, Nicolas G., Chavez, Hugo Orlando Camacho, Diaz, M. Cano, Cappellari, Michele, Carrera, Ricardo, Chen, Yanping, Cherinka, Brian, Cheung, Edmond, Chiappini, Cristina, Chojnowski, Drew, Chuang, Chia-Hsun, Chung, Haeun, Cirolini, Rafael Fernando, Clerc, Nicolas, Cohen, Roger E., Comerford, Julia M., Comparat, Johan, Cousinou, Marie-Claude, Covey, Kevin, Crane, Jeffrey D., Croft, Rupert, Cunha, Katia, da Costa, Luiz, Ilha, Gabriele da Silva, Darling, Jeremy, Davidson Jr., James W., Dawson, Kyle, De Lee, Nathan, de la Macorra, Axel, de la Torre, Sylvain, Machado, Alice Deconto, Delubac, Timothee, Diamond-Stanic, Aleksandar M., Donor, John, Downes, Juan Jose, Drory, Niv, Bourboux, Helion du Mas des, Du, Cheng, Dwelly, Tom, Ebelke, Garrett, Eigenbrot, Arthur, Eisenstein, Daniel J., Elsworth, Yvonne P., Emsellem, Eric, Eracleous, Michael, Escoffier, Stephanie, Evans, Michael L., Falcon-Barroso, Jesus, Fan, Xiaohui, Favole, Ginevra, Fernandez-Alvar, Emma, Fernandez-Trincado, J. G., Feuillet, Diane, Fleming, Scott W., Font-Ribera, Andreu, Freischlad, Gordon, Frinchaboy, Peter, Fu, Hai, Gao, Yang, Garcia-Hernandez, D. A., Perez, Ana E. Garcia, Garcia, Rafael A., Garcia-Dias, R., Gaulme, Patrick, Ge, Junqiang, Geisler, Douglas, Marin, Hector Gil, Gillespie, Bruce, Girardi, Leo, Goddard, Daniel, Chew, Yilen Gomez Maqueo, Gonzalez-Perez, Violeta, Grabowski, Kathleen, Green, Paul, Grier, Catherine J., Grier, Thomas, Guo, Hong, Guy, Julien, Hagen, Alex, Hall, Matt, Harding, Paul, Harley, R. E., Hasselquist, Sten, Hawley, Suzanne, Hayes, Christian R., Hearty, Fred, Hekker, Saskia, Toledo, Hector Hernandez, Ho, Shirley, Hogg, David W., Holley-Bockelmann, Kelly, Holtzman, Jon A., Holzer, Parker H., Hu, Jian, Huber, Daniel, Hutchinson, Timothy Alan, Hwang, Ho Seong, Ibarra-Medel, Hector J., Ivans, Inese I., Ivory, KeShawn, Jaehnig, Kurt, Jensen, Trey W., Johnson, Jennifer A., Jones, Amy, Jullo, Eric, Kallinger, T., Kinemuchi, Karen, Kirkby, David, Klaene, Mark, Kneib, Jean-Paul, Kollmeier, Juna A., Lacerna, Ivan, Lane, Richard R., Lang, Dustin, Laurent, Pierre, Law, David R., Goff, Jean-Marc Le, Leauthaud, Alexie, Li, Cheng, Li, Ran, Li, Chen, Li, Niu, Liang, Fu-Heng, Liang, Yu, Lima, Marcos, Lin, Lihwai, Lin, Lin, Lin, Yen-Ting, Long, Dan, Lucatello, Sara, MacDonald, Nicholas, MacLeod, Chelsea L., Mackereth, J. Ted, Mahadevan, Suvrath, Maia, Marcio Antonio-Geimba, Maiolino, Roberto, Majewski, Steven R., Malanushenko, Olena, Mallmann, Nicolas Dullius, Manchado, Arturo, Maraston, Claudia, Marques-Chaves, Rui, Valpuesta, Inma Martinez, Masters, Karen L., Mathur, Savita, McGreer, Ian D., Merloni, Andrea, Merrifield, Michael R., Meszaros, Szabolcs, Meza, Andres, Miglio, Andrea, Minchev, Ivan, Molaverdikhani, Karan, Montero-Dorta, Antonio D., Mosser, Benoit, Muna, Demitri, Myers, Adam, Nair, Preethi, Nandra, Kirpal, Ness, Melissa, Newman, Jeffrey A., Nichol, Robert C., Nidever, David L., Nitschelm, Christian, O'Connell, Julia, Oravetz, Audrey, Padilla, Nelson, Palanque-Delabrouille, Nathalie, Pan, Kaike, Parejko, John, Paris, Isabelle, Peacock, John A., Peirani, Sebastien, Pellejero-Ibanez, Marcos, Penny, Samantha, Percival, Will J., Percival, Jeffrey W., Perez-Fournon, Ismael, Petitjean, Patrick, Pieri, Matthew, Pinsonneault, Marc H., Pisani, Alice, Prada, Francisco, Prakash, Abhishek, Price-Jones, Natalie, Raddick, M. Jordan, Rahman, Mubdi, Raichoor, Anand, Rembold, Sandro Barboza, Reyna, A. M., Rich, James, Richstein, Hannah, Ridl, Jethro, Riffel, Rogerio, Riffel, Rogemar A., Rix, Hans-Walter, Robin, Annie C., Rockosi, Constance M., Rodriguez-Torres, Sergio, Rodrigues, Thaise S., Roe, Natalie, Lopes, A. Roman, Roman-Zuniga, Carlos, Ross, Ashley J., Rossi, Graziano, Ruan, John, Ruggeri, Rossana, Runnoe, Jessie C., Salazar-Albornoz, Salvador, Salvato, Mara, Sanchez, Ariel G., Sanchez, Sebastian F., Sanchez-Gallego, Jose R., Santiago, Basilio Xavier, Schiavon, Ricardo, Schimoia, Jaderson S., Schlafly, Eddie, Schlegel, David J., Schneider, Donald P., Schoenrich, Ralph, Schultheis, Mathias, Schwope, Axel, Seo, Hee-Jong, Serenelli, Aldo, Sesar, Branimir, Shao, Zhengyi, Shetrone, Matthew, Shull, Michael, Aguirre, Victor Silva, Skrutskie, M. F., Slosar, Anže, Smith, Michael, Smith, Verne V., Sobeck, Jennifer, Somers, Garrett, Souto, Diogo, Stark, David V., Stassun, Keivan G., Steinmetz, Matthias, Stello, Dennis, Bergmann, Thaisa Storchi, Strauss, Michael A., Streblyanska, Alina, Stringfellow, Guy S., Suarez, Genaro, Sun, Jing, Taghizadeh-Popp, Manuchehr, Tang, Baitian, Tao, Charling, Tayar, Jamie, Tembe, Mita, Thomas, Daniel, Tinker, Jeremy, Tojeiro, Rita, Tremonti, Christy, Troup, Nicholas, Trump, Jonathan R., Unda-Sanzana, Eduardo, Valenzuela, O., Bosch, Remco van den, Vargas-Magana, Mariana, Vazquez, Jose Alberto, Villanova, Sandro, Vivek, M., Vogt, Nicole, Wake, David, Walterbos, Rene, Wang, Yuting, Wang, Enci, Weaver, Benjamin Alan, Weijmans, Anne-Marie, Weinberg, David H., Westfall, Kyle B., Whelan, David G., Wilcots, Eric, Wild, Vivienne, Williams, Rob A., Wilson, John, Wood-Vasey, W. M., Wylezalek, Dominika, Xiao, Ting, Yan, Renbin, Yang, Meng, Ybarra, Jason E., Yeche, Christophe, Yuan, Fang-Ting, Zakamska, Nadia, Zamora, Olga, Zasowski, Gail, Zhang, Kai, Zhao, Cheng, Zhao, Gong-Bo, Zheng, Zheng, Zhou, Zhi-Min, Zhu, Guangtun, Zinn, Joel C., and Zou, Hu
Subjects: Astrophysics - Astrophysics of Galaxies
Abstract: The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) began observations in July 2014. It pursues three core programs: APOGEE-2, MaNGA, and eBOSS. In addition, eBOSS contains two major subprograms: TDSS and SPIDERS. This paper describes the first data release from SDSS-IV, Data Release 13 (DR13), which contains new data, reanalysis of existing data sets and, like all SDSS data releases, is inclusive of previously released data. DR13 makes publicly available 1390 spatially resolved integral field unit observations of nearby galaxies from MaNGA, the first data released from this survey. It includes new observations from eBOSS, completing SEQUELS. In addition to targeting galaxies and quasars, SEQUELS also targeted variability-selected objects from TDSS and X-ray selected objects from SPIDERS. DR13 includes new reductions of the SDSS-III BOSS data, improving the spectrophotometric calibration and redshift classification. DR13 releases new reductions of the APOGEE-1 data from SDSS-III, with abundances of elements not previously included and improved stellar parameters for dwarf stars and cooler stars. For the SDSS imaging data, DR13 provides new, more robust and precise photometric calibrations. Several value-added catalogs are being released in tandem with DR13, in particular target catalogs relevant for eBOSS, TDSS, and SPIDERS, and an updated red-clump catalog for APOGEE. This paper describes the location and format of the data now publicly available, as well as providing references to the important technical papers that describe the targeting, observing, and data reduction. The SDSS website, http://www.sdss.org, provides links to the data, tutorials and examples of data access, and extensive documentation of the reduction and analysis procedures. DR13 is the first of a scheduled set that will contain new data and analyses from the planned ~6-year operations of SDSS-IV., Comment: Full information on DR13 available at http://www.sdss.org. Comments welcome to spokesperson@sdss.org. To be published in ApJS
Published: 2016
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14. The evolution of the [OII], H{\beta} and [OIII] emission-line luminosity functions over the last nine billions years

Author: Comparat, Johan, Zhu, Guangtun, Gonzalez-Perez, Violeta, Norberg, Peder, Newman, Jeffrey, Tresse, Laurence, Richard, Johan, Yepes, Gustavo, Kneib, Jean-Paul, Raichoor, Anand, Prada, Francisco, Maraston, Claudia, Yèche, Christophe, Delubac, Timothée, and Jullo, Eric
Subjects: Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: Emission line galaxies are one of the main tracers of the large-scale structure to be targeted by the next-generation dark energy surveys. To provide a better understanding of the properties and statistics of these galaxies, we have collected spectroscopic data from the VVDS and DEEP2 deep surveys and estimated the galaxy luminosity functions (LFs) of three distinct emission lines, [OII] ($0.5 < z < 1.3$), H{\beta} ($0.3 < z < 0.8$) and [OIII] ($0.3 < z < 0.8$). Our measurements are based on 35,639 emission line galaxies and cover a volume of $\sim10^7$Mpc$^3$. We present the first measurement of the H{\beta} LF at these redshifts. We have also compiled LFs from the literature that were based on independent data or covered different redshift ranges, and we fit the entire set over the whole redshift range with analytic Schechter and Saunders models, assuming a natural redshift dependence of the parameters. We find that the characteristic luminosity ($L_*$) and density ($\phi_*$) of all LFs increase with redshift. Using the Schechter model over the redshift ranges considered, we find that, for [OII] emitters, the characteristic luminosity $L_*(z=0.5)=3.2\times10^{41}$ erg/s increases by a factor of $2.7 \pm 0.2$ from z=0.5 to 1.3; for H{\beta} emitters $L_*(z=0.3)=1.3\times10^{41}$ erg/s increases by a factor of $2.0 \pm 0.2$ from z=0.3 to 0.8; and for [OIII] emitters $L_*(z=0.3)=7.3\times10^{41}$ erg/s increases by a factor of $3.5 \pm 0.4$ from z=0.3 to 0.8., Comment: 11 pages. Accepted in MNRAS. Data available at http://projects.ift.uam-csic.es/skies-universes/ via the page emission line luminosity functions
Published: 2016
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15. A 14 $h^{-3}$ Gpc$^3$ study of cosmic homogeneity using BOSS DR12 quasar sample

Author: Laurent, Pierre, Goff, Jean-Marc Le, Burtin, Etienne, Hamilton, Jean-Christophe, Hogg, David W., Myers, Adam, Ntelis, Pierros, Pâris, Isabelle, Rich, James, Aubourg, Eric, Bautista, Julian, Delubac, Timothée, Bourboux, Hélion du Mas des, Eftekharzadeh, Sarah, Delabrouille, Nathalie Palanque, Petitjean, Patrick, Rossi, Graziano, Schneider, Donald P., and Yeche, Christophe
Subjects: Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: The BOSS quasar sample is used to study cosmic homogeneity with a 3D survey in the redshift range $2.2
Published: 2016
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16. The extended Baryon Oscillation Spectroscopic Survey (eBOSS): a cosmological forecast

Author: Zhao, Gong-Bo, Wang, Yuting, Ross, Ashley J., Shandera, Sarah, Percival, Will J., Dawson, Kyle S., Kneib, Jean-Paul, Myers, Adam D., Brownstein, Joel R., Comparat, Johan, Delubac, Timothée, Gao, Pengyuan, Hojjati, Alireza, Koyama, Kazuya, McBride, Cameron K., Meza, Andrés, Newman, Jeffrey A., Palanque-Delabrouille, Nathalie, Pogosian, Levon, Prada, Francisco, Rossi, Graziano, Schneider, Donald P., Seo, Hee-Jong, Tao, Charling, Wang, Dandan, Yèche, Christophe, Zhang, Hanyu, Zhang, Yuecheng, Zhou, Xu, Zhu, Fangzhou, and Zou, Hu
Subjects: Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We present a science forecast for the eBOSS survey, part of the SDSS-IV project, which is a spectroscopic survey using multiple tracers of large-scale structure, including luminous red galaxies (LRGs), emission line galaxies (ELGs) and quasars (both as a direct probe of structure and through the Ly-$\alpha$ forest). Focusing on discrete tracers, we forecast the expected accuracy of the baryonic acoustic oscillation (BAO), the redshift-space distortion (RSD) measurements, the $f_{\rm NL}$ parameter quantifying the primordial non-Gaussianity, the dark energy and modified gravity parameters. We also use the line-of-sight clustering in the Ly-$\alpha$ forest to constrain the total neutrino mass. We find that eBOSS LRGs ($0.60.6$), ELGs ($0.6
Published: 2015
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17. Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe

Author: Blanton, Michael R, Bershady, Matthew A, Abolfathi, Bela, Albareti, Franco D, Prieto, Carlos Allende, Almeida, Andres, Alonso-García, Javier, Anders, Friedrich, Anderson, Scott F, Andrews, Brett, Aquino-Ortíz, Erik, Aragón-Salamanca, Alfonso, Argudo-Fernández, Maria, Armengaud, Eric, Aubourg, Eric, Avila-Reese, Vladimir, Badenes, Carles, Bailey, Stephen, Barger, Kathleen A, Barrera-Ballesteros, Jorge, Bartosz, Curtis, Bates, Dominic, Baumgarten, Falk, Bautista, Julian, Beaton, Rachael, Beers, Timothy C, Belfiore, Francesco, Bender, Chad F, Berlind, Andreas A, Bernardi, Mariangela, Beutler, Florian, Bird, Jonathan C, Bizyaev, Dmitry, Blanc, Guillermo A, Blomqvist, Michael, Bolton, Adam S, Boquien, Médéric, Borissova, Jura, van den Bosch, Remco, Bovy, Jo, Brandt, William N, Brinkmann, Jonathan, Brownstein, Joel R, Bundy, Kevin, Burgasser, Adam J, Burtin, Etienne, Busca, Nicolás G, Cappellari, Michele, Carigi, Maria Leticia Delgado, Carlberg, Joleen K, Rosell, Aurelio Carnero, Carrera, Ricardo, Chanover, Nancy J, Cherinka, Brian, Cheung, Edmond, Chew, Yilen Gómez Maqueo, Chiappini, Cristina, Choi, Peter Doohyun, Chojnowski, Drew, Chuang, Chia-Hsun, Chung, Haeun, Cirolini, Rafael Fernando, Clerc, Nicolas, Cohen, Roger E, Comparat, Johan, da Costa, Luiz, Cousinou, Marie-Claude, Covey, Kevin, Crane, Jeffrey D, Croft, Rupert AC, Cruz-Gonzalez, Irene, Cuadra, Daniel Garrido, Cunha, Katia, Damke, Guillermo J, Darling, Jeremy, Davies, Roger, Dawson, Kyle, de la Macorra, Axel, Dell’Agli, Flavia, De Lee, Nathan, Delubac, Timothée, Di Mille, Francesco, Diamond-Stanic, Aleks, Cano-Díaz, Mariana, Donor, John, Downes, Juan José, Drory, Niv, du Mas des Bourboux, Hélion, Duckworth, Christopher J, Dwelly, Tom, Dyer, Jamie, Ebelke, Garrett, Eigenbrot, Arthur D, Eisenstein, Daniel J, Emsellem, Eric, Eracleous, Mike, Escoffier, Stephanie, Evans, Michael L, Fan, Xiaohui, and Fernández-Alvar, Emma
Subjects: Space Sciences, Astronomical Sciences, Physical Sciences, cosmology: observations, galaxies: general, Galaxy: general, instrumentation: spectrographs, stars: general, surveys, astro-ph.GA, Astronomical and Space Sciences, Astronomy & Astrophysics, Astronomical sciences, Particle and high energy physics
Abstract: We describe the Sloan Digital Sky Survey IV (SDSS-IV), a project encompassing three major spectroscopic programs. The Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2) is observing hundreds of thousands of Milky Way stars at high resolution and high signal-to-noise ratios in the near-infrared. The Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey is obtaining spatially resolved spectroscopy for thousands of nearby galaxies (median z ∼ 0.03). The extended Baryon Oscillation Spectroscopic Survey (eBOSS) is mapping the galaxy, quasar, and neutral gas distributions between z ~ 0.6 and 3.5 to constrain cosmology using baryon acoustic oscillations, redshift space distortions, and the shape of the power spectrum. Within eBOSS, we are conducting two major subprograms: the SPectroscopic IDentification of eROSITA Sources (SPIDERS), investigating X-ray AGNs and galaxies in X-ray clusters, and the Time Domain Spectroscopic Survey (TDSS), obtaining spectra of variable sources. All programs use the 2.5 m Sloan Foundation Telescope at the Apache Point Observatory; observations there began in Summer 2014. APOGEE-2 also operates a second near-infrared spectrograph at the 2.5 m du Pont Telescope at Las Campanas Observatory, with observations beginning in early 2017. Observations at both facilities are scheduled to continue through 2020. In keeping with previous SDSS policy, SDSS-IV provides regularly scheduled public data releases; the first one, Data Release 13, was made available in 2016 July.
Published: 2017

18. Measurement of baryon acoustic oscillation correlations at z = 2.3 with SDSS DR12 Lyα-Forests

Author: Bautista, Julian E, Busca, Nicolás G, Guy, Julien, Rich, James, Blomqvist, Michael, du Mas des Bourboux, Hélion, Pieri, Matthew M, Font-Ribera, Andreu, Bailey, Stephen, Delubac, Timothée, Kirkby, David, Le Goff, Jean-Marc, Margala, Daniel, Slosar, Anže, Vazquez, Jose Alberto, Brownstein, Joel R, Dawson, Kyle S, Eisenstein, Daniel J, Miralda-Escudé, Jordi, Noterdaeme, Pasquier, Palanque-Delabrouille, Nathalie, Pâris, Isabelle, Petitjean, Patrick, Ross, Nicholas P, Schneider, Donald P, Weinberg, David H, and Yèche, Christophe
Subjects: cosmological parameters, dark energy, Astronomical and Space Sciences, Astronomy & Astrophysics
Abstract: We have used flux-transmission correlations in Lyα forests to measure the imprint of baryon acoustic oscillations (BAO). The study uses spectra of 157 783 quasars in the redshift range 2:1 ≤ z ≤ 3:5 from the Sloan Digital Sky Survey (SDSS) data release 12 (DR12). Besides the statistical improvements on our previous studies using SDSS DR9 and DR11, we have implemented numerous improvements in the analysis procedure, allowing us to construct a physical model of the correlation function and to investigate potential systematic errors in the determination of the BAO peak position. The Hubble distance, DH = c=H(z), relative to the sound horizon is DH(z = 2:33)=rd = 9:07 ± 0:31. The best-determined combination of comoving angular-diameter distance, DM, and the Hubble distance is found to be D0:7 H D0:3 M =rd = 13:94±0:35. This value is 1:028±0:026 times the prediction of the flat-ΛCDM model consistent with the cosmic microwave background (CMB) anisotropy spectrum. The errors include marginalization over the effects of unidentified high-density absorption systems and fluctuations in ultraviolet ionizing radiation. Independently of the CMB measurements, the combination of our results and other BAO observations determine the open-ΛCDM density parameters to be ΩM = 0:296 ± 0:029, ΩΛ = 0:699 ± 0:100 and Ωk = -0:002 ± 0:119.
Published: 2017

19. The DESI Experiment Part I: Science,Targeting, and Survey Design

Author: Collaboration, DESI, Aghamousa, Amir, Aguilar, Jessica, Ahlen, Steve, Alam, Shadab, Allen, Lori E, Prieto, Carlos Allende, Annis, James, Bailey, Stephen, Balland, Christophe, Ballester, Otger, Baltay, Charles, Beaufore, Lucas, Bebek, Chris, Beers, Timothy C, Bell, Eric F, Bernal, José Luis, Besuner, Robert, Beutler, Florian, Blake, Chris, Bleuler, Hannes, Blomqvist, Michael, Blum, Robert, Bolton, Adam S, Briceno, Cesar, Brooks, David, Brownstein, Joel R, Buckley-Geer, Elizabeth, Burden, Angela, Burtin, Etienne, Busca, Nicolas G, Cahn, Robert N, Cai, Yan-Chuan, Cardiel-Sas, Laia, Carlberg, Raymond G, Carton, Pierre-Henri, Casas, Ricard, Castander, Francisco J, Cervantes-Cota, Jorge L, Claybaugh, Todd M, Close, Madeline, Coker, Carl T, Cole, Shaun, Comparat, Johan, Cooper, Andrew P, Cousinou, M-C, Crocce, Martin, Cuby, Jean-Gabriel, Cunningham, Daniel P, Davis, Tamara M, Dawson, Kyle S, Macorra, Axel de la, Vicente, Juan De, Delubac, Timothée, Derwent, Mark, Dey, Arjun, Dhungana, Govinda, Ding, Zhejie, Doel, Peter, Duan, Yutong T, Ealet, Anne, Edelstein, Jerry, Eftekharzadeh, Sarah, Eisenstein, Daniel J, Elliott, Ann, Escoffier, Stéphanie, Evatt, Matthew, Fagrelius, Parker, Fan, Xiaohui, Fanning, Kevin, Farahi, Arya, Farihi, Jay, Favole, Ginevra, Feng, Yu, Fernandez, Enrique, Findlay, Joseph R, Finkbeiner, Douglas P, Fitzpatrick, Michael J, Flaugher, Brenna, Flender, Samuel, Font-Ribera, Andreu, Forero-Romero, Jaime E, Fosalba, Pablo, Frenk, Carlos S, Fumagalli, Michele, Gaensicke, Boris T, Gallo, Giuseppe, Garcia-Bellido, Juan, Gaztanaga, Enrique, Fusillo, Nicola Pietro Gentile, Gerard, Terry, Gershkovich, Irena, Giannantonio, Tommaso, Gillet, Denis, Gonzalez-de-Rivera, Guillermo, Gonzalez-Perez, Violeta, Gott, Shelby, Graur, Or, Gutierrez, Gaston, and Guy, Julien
Subjects: astro-ph.IM, astro-ph.CO
Abstract: DESI (Dark Energy Spectroscopic Instrument) is a Stage IV ground-based darkenergy experiment that will study baryon acoustic oscillations (BAO) and thegrowth of structure through redshift-space distortions with a wide-area galaxyand quasar redshift survey. To trace the underlying dark matter distribution,spectroscopic targets will be selected in four classes from imaging data. Wewill measure luminous red galaxies up to $z=1.0$. To probe the Universe out toeven higher redshift, DESI will target bright [O II] emission line galaxies upto $z=1.7$. Quasars will be targeted both as direct tracers of the underlyingdark matter distribution and, at higher redshifts ($ 2.1 < z < 3.5$), for theLy-$\alpha$ forest absorption features in their spectra, which will be used totrace the distribution of neutral hydrogen. When moonlight prevents efficientobservations of the faint targets of the baseline survey, DESI will conduct amagnitude-limited Bright Galaxy Survey comprising approximately 10 milliongalaxies with a median $z\approx 0.2$. In total, more than 30 million galaxyand quasar redshifts will be obtained to measure the BAO feature and determinethe matter power spectrum, including redshift space distortions.
Published: 2016

20. The DESI Experiment Part II: Instrument Design

Author: Collaboration, DESI, Aghamousa, Amir, Aguilar, Jessica, Ahlen, Steve, Alam, Shadab, Allen, Lori E, Prieto, Carlos Allende, Annis, James, Bailey, Stephen, Balland, Christophe, Ballester, Otger, Baltay, Charles, Beaufore, Lucas, Bebek, Chris, Beers, Timothy C, Bell, Eric F, Bernal, José Luis, Besuner, Robert, Beutler, Florian, Blake, Chris, Bleuler, Hannes, Blomqvist, Michael, Blum, Robert, Bolton, Adam S, Briceno, Cesar, Brooks, David, Brownstein, Joel R, Buckley-Geer, Elizabeth, Burden, Angela, Burtin, Etienne, Busca, Nicolas G, Cahn, Robert N, Cai, Yan-Chuan, Cardiel-Sas, Laia, Carlberg, Raymond G, Carton, Pierre-Henri, Casas, Ricard, Castander, Francisco J, Cervantes-Cota, Jorge L, Claybaugh, Todd M, Close, Madeline, Coker, Carl T, Cole, Shaun, Comparat, Johan, Cooper, Andrew P, Cousinou, M-C, Crocce, Martin, Cuby, Jean-Gabriel, Cunningham, Daniel P, Davis, Tamara M, Dawson, Kyle S, Macorra, Axel de la, Vicente, Juan De, Delubac, Timothée, Derwent, Mark, Dey, Arjun, Dhungana, Govinda, Ding, Zhejie, Doel, Peter, Duan, Yutong T, Ealet, Anne, Edelstein, Jerry, Eftekharzadeh, Sarah, Eisenstein, Daniel J, Elliott, Ann, Escoffier, Stéphanie, Evatt, Matthew, Fagrelius, Parker, Fan, Xiaohui, Fanning, Kevin, Farahi, Arya, Farihi, Jay, Favole, Ginevra, Feng, Yu, Fernandez, Enrique, Findlay, Joseph R, Finkbeiner, Douglas P, Fitzpatrick, Michael J, Flaugher, Brenna, Flender, Samuel, Font-Ribera, Andreu, Forero-Romero, Jaime E, Fosalba, Pablo, Frenk, Carlos S, Fumagalli, Michele, Gaensicke, Boris T, Gallo, Giuseppe, Garcia-Bellido, Juan, Gaztanaga, Enrique, Fusillo, Nicola Pietro Gentile, Gerard, Terry, Gershkovich, Irena, Giannantonio, Tommaso, Gillet, Denis, Gonzalez-de-Rivera, Guillermo, Gonzalez-Perez, Violeta, Gott, Shelby, Graur, Or, Gutierrez, Gaston, and Guy, Julien
Subjects: astro-ph.IM, astro-ph.CO
Abstract: DESI (Dark Energy Spectropic Instrument) is a Stage IV ground-based darkenergy experiment that will study baryon acoustic oscillations and the growthof structure through redshift-space distortions with a wide-area galaxy andquasar redshift survey. The DESI instrument is a robotically-actuated,fiber-fed spectrograph capable of taking up to 5,000 simultaneous spectra overa wavelength range from 360 nm to 980 nm. The fibers feed ten three-armspectrographs with resolution $R= \lambda/\Delta\lambda$ between 2000 and 5500,depending on wavelength. The DESI instrument will be used to conduct afive-year survey designed to cover 14,000 deg$^2$. This powerful instrumentwill be installed at prime focus on the 4-m Mayall telescope in Kitt Peak,Arizona, along with a new optical corrector, which will provide a three-degreediameter field of view. The DESI collaboration will also deliver aspectroscopic pipeline and data management system to reduce and archive alldata for eventual public use.
Published: 2016

21. Clustering properties of g-selected galaxies at z ∼ 0.8

Author: Favole, Ginevra, Comparat, Johan, Prada, Francisco, Yepes, Gustavo, Jullo, Eric, Niemiec, Anna, Kneib, Jean-Paul, Rodríguez-Torres, Sergio A, Klypin, Anatoly, Skibba, Ramin A, McBride, Cameron K, Eisenstein, Daniel J, Schlegel, David J, Nuza, Sebastián E, Chuang, Chia-Hsun, Delubac, Timothée, Yèche, Christophe, and Schneider, Donald P
Subjects: galaxies: distances and redshifts, galaxies: haloes, galaxies: statistics, cosmology: observations, cosmology: theory, large-scale structure of Universe, Astronomical and Space Sciences, Astronomy & Astrophysics
Abstract: Current and future large redshift surveys, as the Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey (SDSS-IV/eBOSS) or the Dark Energy Spectroscopic Instrument (DESI), will use emission-line galaxies (ELGs) to probe cosmological models by mapping the large-scale structure of the Universe in the redshift range 0.6 < z < 1.7. With current data, we explore the halo-galaxy connection by measuring three clustering properties of g-selected ELGs as matter tracers in the redshift range 0.6 < z < 1: (i) the redshift-space two-point correlation function using spectroscopic redshifts from the BOSS ELG sample and VIPERS; (ii) the angular two-point correlation function on the footprint of the CFHT-LS; (iii) the galaxy-galaxy lensing signal around the ELGs using the CFHTLenS. We interpret these observations by mapping them on to the latest high-resolution MultiDark Planck N-body simulation, using a novel (Sub)Halo-Abundance Matching technique that accounts for the ELG incompleteness. ELGs at z ~ 0.8 live in haloes of (1 ± 0.5) × 1012 h-1M⊙ and 22.5 ± 2.5 per cent of them are satellites belonging to a larger halo. The halo occupation distribution of ELGs indicates that we are sampling the galaxies in which stars form in the most efficient way, according to their stellar-to-halo mass ratio.
Published: 2016

22. The SDSS-IV extended Baryonic Oscillation Spectroscopic Survey: Luminous Red Galaxy Target Selection

Author: Prakash, Abhishek, Licquia, Timothy C., Newman, Jeffrey A., Ross, Ashley J., Myers, Adam D., Dawson, Kyle S., Kneib, Jean-Paul, Percival, Will J., Bautista, Julian E., Comparat, Johan, Tinker, Jeremy L., Schlegel, David J., Tojeiro, Rita, Ho, Shirley, Lang, Dustin, Rao, Sandhya M., McBride, Cameron K., Zhu, Guangtun Ben, Brownstein, Joel R., Bailey, Stephen, Bolton, Adam S., Delubac, Timothee, Mariappan, Vivek, Blanton, Michael R., Reid, Beth, Schneider, Donald P., Seo, Hee-Jong, Rosell, Aurelio Carnero, and Prada, Francisco
Subjects: Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Astrophysics of Galaxies
Abstract: We describe the algorithm used to select the Luminous Red Galaxy (LRG) sample for the extended Baryon Oscillation Spectroscopic Survey (eBOSS) of the Sloan Digital Sky Survey IV (SDSS-IV) using photometric data from both the SDSS and the Wide-Field Infrared Survey Explorer (WISE). LRG targets are required to meet a set of color selection criteria and have z-band and i-band MODEL magnitudes z < 19.95 and 19.9 < i < 21.8, respectively. Our algorithm selects roughly 50 LRG targets per square degree, the great majority of which lie in the redshift range 0.6 < z < 1.0 (median redshift 0.71). We demonstrate that our methods are highly effective at eliminating stellar contamination and lower-redshift galaxies. We perform a number of tests using spectroscopic data from SDSS-III/BOSS to determine the redshift reliability of our target selection and its ability to meet the science requirements of eBOSS. The SDSS spectra are of high enough signal-to-noise ratio that at least 89% of the target sample yields secure redshift measurements. We also present tests of the uniformity and homogeneity of the sample, demonstrating that it should be clean enough for studies of the large-scale structure of the universe at higher redshifts than SDSS-III/BOSS LRGs reached., Comment: Submitted in ApJS, 15 pages, 10 figures
Published: 2015
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23. The SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Overview and Early Data

Author: Dawson, Kyle S., Kneib, Jean-Paul, Percival, Will J., Alam, Shadab, Albareti, Franco D., Anderson, Scott F., Armengaud, Eric, Aubourg, Eric, Bailey, Stephen, Bautista, Julian E., Berlind, Andreas A., Bershady, Matthew A., Beutler, Florian, Bizyaev, Dmitry, Blanton, Michael R., Blomqvist, Michael, Bolton, Adam S., Bovy, Jo, Brandt, W. N., Brinkmann, Jon, Brownstein, Joel R., Burtin, Etienne, Busca, N. G., Cai, Zheng, Chuang, Chia-Hsun, Clerc, Nicolas, Comparat, Johan, Cope, Frances, Croft, Rupert A. C., Cruz-Gonzalez, Irene, da Costa, Luiz N., Cousinou, Marie-Claude, Darling, Jeremy, de la Macorra, Axel, de la Torre, Sylvain, Delubac, Timothee, Bourboux, Helion du Mas des, Dwelly, Tom, Ealet, Anne, Eisenstein, Daniel J., Eracleous, Michael, Escoffier, S., Fan, Xiaohui, Finoguenov, Alexis, Font-Ribera, Andreu, Frinchaboy, Peter, Gaulme, Patrick, Georgakakis, Antonis, Green, Paul, Guo, Hong, Guy, Julien, Ho, Shirley, Holder, Diana, Huehnerhoff, Joe, Hutchinson, Timothy, Jing, Yipeng, Jullo, Eric, Kamble, Vikrant, Kinemuchi, Karen, Kirkby, David, Kitaura, Francisco-Shu, Klaene, Mark A., Laher, Russ R., Lang, Dustin, Laurent, Pierre, Goff, Jean-Marc Le, Li, Cheng, Liang, Yu, Lima, Marcos, Lin, Qiufan, Lin, Weipeng, Lin, Yen-Ting, Long, Daniel C., Lundgren, Britt, MacDonald, Nicholas, Maia, Marcio Antonio Geimba, Malanushenko, Elena, Malanushenko, Viktor, Mariappan, Vivek, McBride, Cameron K., McGreer, Ian D., Menard, Brice, Merloni, Andrea, Meza, Andres, Montero-Dorta, Antonio D., Muna, Demitri, Myers, Adam D., Nandra, Kirpal, Naugle, Tracy, Newman, Jeffrey A., Noterdaeme, Pasquier, Nugent, Peter, Ogando, Ricardo, Olmstead, Matthew D., Oravetz, Audrey, Oravetz, Daniel J., Padmanabhan, Nikhil, Palanque-Delabrouille, Nathalie, Pan, Kaike, Parejko, John K., Paris, Isabelle, Peacock, John A., Petitjean, Patrick, Pieri, Matthew M., Pisani, Alice, Prada, Francisco, Prakash, Abhishek, Raichoor, Anand, Reid, Beth, Rich, James, Ridl, Jethro, Rodriguez-Torres, Sergio, Rosell, Aurelio Carnero, Ross, Ashley J., Rossi, Graziano, Ruan, John, Salvato, Mara, Sayres, Conor, Schneider, Donald P., Schlegel, David J., Seljak, Uros, Seo, Hee-Jong, Sesar, Branimir, Shandera, Sarah, Shu, Yiping, Slosar, Anze, Sobreira, Flavia, Streblyanska, Alina, Suzuki, Nao, Tao, Charling, Taylor, Donna, Tinker, Jeremy L., Tojeiro, Rita, Vargas-Magana, Mariana, Wang, Yuting, Weaver, Benjamin A., Weinberg, David H., White, Martin, Wood-Vasey, W. M., Yeche, Christophe, Zhai, Zhongxu, Zhao, Cheng, Zhao, Gong-bo, Zheng, Zheng, Zhu, Guangtun Ben, and Zou, Hu
Subjects: Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: The Extended Baryon Oscillation Spectroscopic Survey (eBOSS) will conduct novel cosmological observations using the BOSS spectrograph at Apache Point Observatory. Observations will be simultaneous with the Time Domain Spectroscopic Survey (TDSS) designed for variability studies and the Spectroscopic Identification of eROSITA Sources (SPIDERS) program designed for studies of X-ray sources. eBOSS will use four different tracers to measure the distance-redshift relation with baryon acoustic oscillations (BAO). Using more than 250,000 new, spectroscopically confirmed luminous red galaxies at a median redshift z=0.72, we project that eBOSS will yield measurements of $d_A(z)$ to an accuracy of 1.2% and measurements of H(z) to 2.1% when combined with the z>0.6 sample of BOSS galaxies. With ~195,000 new emission line galaxy redshifts, we expect BAO measurements of $d_A(z)$ to an accuracy of 3.1% and H(z) to 4.7% at an effective redshift of z= 0.87. A sample of more than 500,000 spectroscopically-confirmed quasars will provide the first BAO distance measurements over the redshift range 0.92.1; these new data will enhance the precision of $d_A(z)$ and H(z) by a factor of 1.44 relative to BOSS. Furthermore, eBOSS will provide improved tests of General Relativity on cosmological scales through redshift-space distortion measurements, improved tests for non-Gaussianity in the primordial density field, and new constraints on the summed mass of all neutrino species. Here, we provide an overview of the cosmological goals, spectroscopic target sample, demonstration of spectral quality from early data, and projected cosmological constraints from eBOSS., Comment: 39 pages, 13 figures, accepted AJ, revised for consistency with accepted version
Published: 2015
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24. Near-ultraviolet Spectroscopy of Star-forming Galaxies from eBOSS: Signatures of Ubiquitous Galactic-scale Outflows

Author: Zhu, Guangtun Ben, Comparat, Johan, Kneib, Jean-Paul, Delubac, Timothée, Raichoor, Anand, Dawson, Kyle S., Newman, Jeffrey, Yèche, Christophe, Zhou, Xu, and Schneider, Donald P.
Subjects: Astrophysics - Astrophysics of Galaxies
Abstract: We present the rest-frame near-ultraviolet (NUV) spectroscopy of star-forming galaxies (SFGs) at 0.60.6. We use the data from the pilot observations of this program, including 8620 spectra of SFGs at 0.6
Published: 2015
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25. Clustering properties of $g$-selected galaxies at $z\sim0.8$

Author: Favole, Ginevra, Comparat, Johan, Prada, Francisco, Yepes, Gustavo, Jullo, Eric, Niemiec, Anna, Kneib, Jean-Paul, Rodríguez-Torres, Sergio A., Klypin, Anatoly, Skibba, Ramin A., McBride, Cameron K., Eisenstein, Daniel J., Schlegel, David J., Nuza, Sebastián E., Chuang, Chia-Hsun, Delubac, Timothée, Yèche, Christophe, and Schneider, Donald P.
Subjects: Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Astrophysics of Galaxies, 85A05, 85A40
Abstract: Current and future large redshift surveys, as the Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey (SDSS-IV/eBOSS) or the Dark Energy Spectroscopic Instrument (DESI), will use emission-line galaxies (ELG) to probe cosmological models by mapping the large-scale structure of the Universe in the redshift range $0.6 < z < 1.7$. With current data, we explore the halo-galaxy connection by measuring three clustering properties of $g$-selected ELGs as matter tracers in the redshift range $0.6 < z < 1$: (i) the redshift-space two-point correlation function using spectroscopic redshifts from the BOSS ELG sample and VIPERS; (ii) the angular two-point correlation function on the footprint of the CFHT-LS; (iii) the galaxy-galaxy lensing signal around the ELGs using the CFHTLenS. We interpret these observations by mapping them onto the latest high-resolution MultiDark Planck N-body simulation, using a novel (Sub)Halo-Abundance Matching technique that accounts for the ELG incompleteness. ELGs at $z\sim0.8$ live in halos of $(1\pm 0.5)\times10^{12}\,h^{-1}$M$_{\odot}$ and 22.5$\pm2.5$% of them are satellites belonging to a larger halo. The halo occupation distribution of ELGs indicates that we are sampling the galaxies in which stars form in the most efficient way, according to their stellar-to-halo mass ratio., Comment: 11 pages, 7 figures, 2 tables
Published: 2015
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26. Large-scale clustering of Lyman-alpha emission intensity from SDSS/BOSS

Author: Croft, Rupert A. C., Miralda-Escudé, Jordi, Zheng, Zheng, Bolton, Adam, Dawson, Kyle S., Peterson, Jeffrey B., York, Donald G., Eisenstein, Daniel, Brinkmann, Jon, Brownstein, Joel, Delubac, Timothée, Font-Ribera, Andreu, Hamilton, Jean-Christophe, Lee, Khee-Gan, Myers, Adam, Palanque-Delabrouille, Nathalie, Pâris, Isabelle, Petitjean, Patrick, Pieri, Matthew M., Ross, Nicholas P., Rossi, Graziano, Schlegel, David J., Schneider, Donald P., Slosar, Anže, Vazquez, José, Viel, Matteo, Weinberg, David H., and Yèche, Christophe
Subjects: Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Astrophysics of Galaxies
Abstract: (Abridged) We detect the large-scale structure of Lya emission in the Universe at redshifts z=2-3.5 by measuring the cross-correlation of Lya surface brightness with quasars in SDSS/BOSS. We use a million spectra targeting Luminous Red Galaxies at z<0.8, after subtracting a best fit model galaxy spectrum from each one, as an estimate of the high-redshift Lya surface brightness. The quasar-Lya emission cross-correlation we detect has a shape consistent with a LambdaCDM model with Omega_M =0.30^+0.10-0.07. The predicted amplitude of this cross-correlation is proportional to the product of the mean Lya surface brightness, , the amplitude of mass fluctuations, and the quasar and Lya emission bias factors. Using known values, we infer (b_alpha/3) = (3.9 +/- 0.9) x 10^-21 erg/s cm^-2 A^-1 arcsec^-2, where b_alpha is the Lya emission bias factor. If the dominant sources of Lya emission are star forming galaxies, we infer rho_SFR = (0.28 +/- 0.07) (3/b_alpha) /yr/Mpc^3 at z=2-3.5. For b_alpha=3, this value is a factor of 21-35 above previous estimates from individually detected Lya emitters, although consistent with the total rho_SFR derived from dust-corrected, continuum UV surveys. 97% of the Lya emission in the Universe at these redshifts is therefore undetected in previous surveys of Lya emitters. Our measurement is much greater than seen from stacking analyses of faint halos surrounding previously detected Lya emitters, but we speculate that it arises from similar Lya halos surrounding all luminous star-forming galaxies. We also detect redshift space anisotropy of the quasar-Lya emission cross-correlation, finding evidence at the 3.0 sigma level that it is radially elongated, consistent with distortions caused by radiative-transfer effects (Zheng et al. (2011)). Our measurements represent the first application of the intensity mapping technique to optical observations., Comment: 32 pages, 29 figures. Submitted to MNRAS. Video summary of the paper at: https://www.youtube.com/watch?v=9E6Ap66G5h0
Published: 2015
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27. The Eleventh and Twelfth Data Releases of the Sloan Digital Sky Survey: Final Data from SDSS-III

Author: Alam, Shadab, Albareti, Franco D., Prieto, Carlos Allende, Anders, F., Anderson, Scott F., Andrews, Brett H., Armengaud, Eric, Aubourg, Éric, Bailey, Stephen, Bautista, Julian E., Beaton, Rachael L., Beers, Timothy C., Bender, Chad F., Berlind, Andreas A., Beutler, Florian, Bhardwaj, Vaishali, Bird, Jonathan C., Bizyaev, Dmitry, Blake, Cullen H., Blanton, Michael R., Blomqvist, Michael, Bochanski, John J., Bolton, Adam S., Bovy, Jo, Bradley, A. Shelden, Brandt, W. N., Brauer, D. E., Brinkmann, J., Brown, Peter J., Brownstein, Joel R., Burden, Angela, Burtin, Etienne, Busca, Nicolás G., Cai, Zheng, Capozzi, Diego, Rosell, Aurelio Carnero, Carrera, Ricardo, Chen, Yen-Chi, Chiappini, Cristina, Chojnowski, S. Drew, Chuang, Chia-Hsun, Clerc, Nicolas, Comparat, Johan, Covey, Kevin, Croft, Rupert A. C., Cuesta, Antonio J., Cunha, Katia, da Costa, Luiz N., Da Rio, Nicola, Davenport, James R. A., Dawson, Kyle S., De Lee, Nathan, Delubac, Timothée, Deshpande, Rohit, Dutra-Ferreira, Letícia, Dwelly, Tom, Ealet, Anne, Ebelke, Garrett L., Edmondson, Edward M., Eisenstein, Daniel J., Escoffier, Stephanie, Esposito, Massimiliano, Fan, Xiaohui, Fernández-Alvar, Emma, Feuillet, Diane, Ak, Nurten Filiz, Finley, Hayley, Finoguenov, Alexis, Flaherty, Kevin, Fleming, Scott W., Font-Ribera, Andreu, Foster, Jonathan, Frinchaboy, Peter M., Galbraith-Frew, J. G., García-Hernández, D. A., Pérez, Ana E. García, Gaulme, Patrick, Ge, Jian, Génova-Santos, R., Ghezzi, Luan, Gillespie, Bruce A., Girardi, Léo, Goddard, Daniel, Gontcho, Satya Gontcho A, Hernández, Jonay I. González, Grebel, Eva K., Grieb, Jan Niklas, Grieves, Nolan, Gunn, James E., Guo, Hong, Harding, Paul, Hasselquist, Sten, Hawley, Suzanne L., Hayden, Michael, Hearty, Fred R., Ho, Shirley, Hogg, David W., Holley-Bockelmann, Kelly, Holtzman, Jon A., Honscheid, Klaus, Huehnerhoff, Joseph, Jiang, Linhua, Johnson, Jennifer A., Kinemuchi, Karen, Kirkby, David, Kitaura, Francisco, Klaene, Mark A., Kneib, Jean-Paul, Koenig, Xavier P., Lam, Charles R., Lan, Ting-Wen, Lang, Dustin, Laurent, Pierre, Goff, Jean-Marc Le, Leauthaud, Alexie, Lee, Khee-Gan, Lee, Young Sun, Licquia, Timothy C., Liu, Jian, Long, Daniel C., López-Corredoira, Martín, Lorenzo-Oliveira, Diego, Lucatello, Sara, Lundgren, Britt, Lupton, Robert H., Mack III, Claude E., Mahadevan, Suvrath, Maia, Marcio A. G., Majewski, Steven R., Malanushenko, Elena, Malanushenko, Viktor, Manchado, A., Manera, Marc, Mao, Qingqing, Maraston, Claudia, Marchwinski, Robert C., Margala, Daniel, Martell, Sarah L., Martig, Marie, Masters, Karen L., McBride, Cameron K., McGehee, Peregrine M., McGreer, Ian D., McMahon, Richard G., Ménard, Brice, Menzel, Marie-Luise, Merloni, Andrea, Mészáros, Szabolcs, Miller, Adam A., Miralda-Escudé, Jordi, Miyatake, Hironao, Montero-Dorta, Antonio D., More, Surhud, Morice-Atkinson, Xan, Morrison, Heather L., Muna, Demitri, Myers, Adam D., Newman, Jeffrey A., Neyrinck, Mark, Nguyen, Duy Cuong, Nichol, Robert C., Nidever, David L., Noterdaeme, Pasquier, Nuza, Sebastián E., O'Connell, Julia E., O'Connell, Robert W., O'Connell, Ross, Ogando, Ricardo L. C., Olmstead, Matthew D., Oravetz, Audrey E., Oravetz, Daniel J., Osumi, Keisuke, Owen, Russell, Padgett, Deborah L., Padmanabhan, Nikhil, Paegert, Martin, Palanque-Delabrouille, Nathalie, Pan, Kaike, Parejko, John K., Park, Changbom, Pâris, Isabelle, Pattarakijwanich, Petchara, Pellejero-Ibanez, M., Pepper, Joshua, Percival, Will J., Pérez-Fournon, Ismael, Pérez-Ràfols, Ignasi, Petitjean, Patrick, Pieri, Matthew M., Pinsonneault, Marc H., de Mello, Gustavo F. Porto, Prada, Francisco, Prakash, Abhishek, Price-Whelan, Adrian M., Raddick, M. Jordan, Rahman, Mubdi, Reid, Beth A., Rich, James, Rix, Hans-Walter, Robin, Annie C., Rockosi, Constance M., Rodrigues, Thaíse S., Rodríguez-Rottes, Sergio, Roe, Natalie A., Ross, Ashley J., Ross, Nicholas P., Rossi, Graziano, Ruan, John J., Rubiño-Martín, J. A., Rykoff, Eli S., Salazar-Albornoz, Salvador, Salvato, Mara, Samushia, Lado, Sánchez, Ariel G., Santiago, Basílio, Sayres, Conor, Schiavon, Ricardo P., Schlegel, David J., Schmidt, Sarah J., Schneider, Donald P., Schultheis, Mathias, Schwope, Axel D., Scóccola, C. G., Sellgren, Kris, Seo, Hee-Jong, Shane, Neville, Shen, Yue, Shetrone, Matthew, Shu, Yiping, Sivarani, Thirupathi, Skrutskie, M. F., Slosar, Anže, Smith, Verne V., Sobreira, Flávia, Stassun, Keivan G., Steinmetz, Matthias, Strauss, Michael A., Streblyanska, Alina, Swanson, Molly E. C., Tan, Jonathan C., Tayar, Jamie, Terrien, Ryan C., Thakar, Aniruddha R., Thomas, Daniel, Thompson, Benjamin A., Tinker, Jeremy L., Tojeiro, Rita, Troup, Nicholas W., Vargas-Magaña, Mariana, Vazquez, Jose A., Verde, Licia, Viel, Matteo, Vogt, Nicole P., Wake, David A., Wang, Ji, Weaver, Benjamin A., Weinberg, David H., Weiner, Benjamin J., White, Martin, Wilson, John C., Wisniewski, John P., Wood-Vasey, W. M., Yèche, Christophe, York, Donald G., Zakamska, Nadia L., Zamora, O., Zasowski, Gail, Zehavi, Idit, Zhao, Gong-Bo, Zheng, Zheng, Zhou, Xu, Zhou, Zhimin, Zhu, Guangtun, and Zou, Hu
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Astrophysics of Galaxies, Astrophysics - Solar and Stellar Astrophysics
Abstract: The third generation of the Sloan Digital Sky Survey (SDSS-III) took data from 2008 to 2014 using the original SDSS wide-field imager, the original and an upgraded multi-object fiber-fed optical spectrograph, a new near-infrared high-resolution spectrograph, and a novel optical interferometer. All the data from SDSS-III are now made public. In particular, this paper describes Data Release 11 (DR11) including all data acquired through 2013 July, and Data Release 12 (DR12) adding data acquired through 2014 July (including all data included in previous data releases), marking the end of SDSS-III observing. Relative to our previous public release (DR10), DR12 adds one million new spectra of galaxies and quasars from the Baryon Oscillation Spectroscopic Survey (BOSS) over an additional 3000 sq. deg of sky, more than triples the number of H-band spectra of stars as part of the Apache Point Observatory (APO) Galactic Evolution Experiment (APOGEE), and includes repeated accurate radial velocity measurements of 5500 stars from the Multi-Object APO Radial Velocity Exoplanet Large-area Survey (MARVELS). The APOGEE outputs now include measured abundances of 15 different elements for each star. In total, SDSS-III added 2350 sq. deg of ugriz imaging; 155,520 spectra of 138,099 stars as part of the Sloan Exploration of Galactic Understanding and Evolution 2 (SEGUE-2) survey; 2,497,484 BOSS spectra of 1,372,737 galaxies, 294,512 quasars, and 247,216 stars over 9376 sq. deg; 618,080 APOGEE spectra of 156,593 stars; and 197,040 MARVELS spectra of 5,513 stars. Since its first light in 1998, SDSS has imaged over 1/3 of the Celestial sphere in five bands and obtained over five million astronomical spectra., Comment: DR12 data are available at http://www.sdss3.org/dr12. 30 pages. 11 figures. Accepted to ApJS
Published: 2015
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28. Cosmological implications of baryon acoustic oscillation (BAO) measurements

Author: Aubourg, Éric, Bailey, Stephen, Bautista, Julian E., Beutler, Florian, Bhardwaj, Vaishali, Bizyaev, Dmitry, Blanton, Michael, Blomqvist, Michael, Bolton, Adam S., Bovy, Jo, Brewington, Howard, Brinkmann, J., Brownstein, Joel R., Burden, Angela, Busca, Nicolás G., Carithers, William, Chuang, Chia-Hsun, Comparat, Johan, Cuesta, Antonio J., Dawson, Kyle S., Delubac, Timothée, Eisenstein, Daniel J., Font-Ribera, Andreu, Ge, Jian, Goff, J. -M. Le, Gontcho, Satya Gontcho A, Gott III, J. Richard, Gunn, James E., Guo, Hong, Guy, Julien, Hamilton, Jean-Christophe, Ho, Shirley, Honscheid, Klaus, Howlett, Cullan, Kirkby, David, Kitaura, Francisco S., Kneib, Jean-Paul, Lee, Khee-Gan, Long, Dan, Lupton, Robert H., Magaña, Mariana Vargas, Malanushenko, Viktor, Malanushenko, Elena, Manera, Marc, Maraston, Claudia, Margala, Daniel, McBride, Cameron K., Miralda-Escudé, Jordi, Myers, Adam D., Nichol, Robert C., Noterdaeme, Pasquier, Nuza, Sebastián E., Olmstead, Matthew D., Oravetz, Daniel, Pâris, Isabelle, Padmanabhan, Nikhil, Palanque-Delabrouille, Nathalie, Pan, Kaike, Pellejero-Ibanez, Marcos, Percival, Will J., Petitjean, Patrick, Pieri, Matthew M., Prada, Francisco, Reid, Beth, Roe, Natalie A., Ross, Ashley J., Ross, Nicholas P., Rossi, Graziano, Rubiño-Martín, Jose Alberto, Sánchez, Ariel G., Samushia, Lado, Santos, Ricardo Tanausú Génova, Scóccola, Claudia G., Schlegel, David J., Schneider, Donald P., Seo, Hee-Jong, Sheldon, Erin, Simmons, Audrey, Skibba, Ramin A., Slosar, Anže, Strauss, Michael A., Thomas, Daniel, Tinker, Jeremy L., Tojeiro, Rita, Vazquez, Jose Alberto, Viel, Matteo, Wake, David A., Weaver, Benjamin A., Weinberg, David H., Wood-Vasey, W. M., Yèche, Christophe, Zehavi, Idit, and Zhao, Gong-Bo
Subjects: Astrophysics - Cosmology and Nongalactic Astrophysics, General Relativity and Quantum Cosmology, High Energy Physics - Experiment
Abstract: We derive constraints on cosmological parameters and tests of dark energy models from the combination of baryon acoustic oscillation (BAO) measurements with cosmic microwave background (CMB) and Type Ia supernova (SN) data. We take advantage of high-precision BAO measurements from galaxy clustering and the Ly-alpha forest (LyaF) in the BOSS survey of SDSS-III. BAO data alone yield a high confidence detection of dark energy, and in combination with the CMB angular acoustic scale they further imply a nearly flat universe. Combining BAO and SN data into an "inverse distance ladder" yields a 1.7% measurement of $H_0=67.3 \pm1.1$ km/s/Mpc. This measurement assumes standard pre-recombination physics but is insensitive to assumptions about dark energy or space curvature, so agreement with CMB-based estimates that assume a flat LCDM cosmology is an important corroboration of this minimal cosmological model. For open LCDM, our BAO+SN+CMB combination yields $\Omega_m=0.301 \pm 0.008$ and curvature $\Omega_k=-0.003 \pm 0.003$. When we allow more general forms of evolving dark energy, the BAO+SN+CMB parameter constraints remain consistent with flat LCDM. While the overall $\chi^2$ of model fits is satisfactory, the LyaF BAO measurements are in moderate (2-2.5 sigma) tension with model predictions. Models with early dark energy that tracks the dominant energy component at high redshifts remain consistent with our constraints. Expansion history alone yields an upper limit of 0.56 eV on the summed mass of neutrino species, improving to 0.26 eV if we include Planck CMB lensing. Standard dark energy models constrained by our data predict a level of matter clustering that is high compared to most, but not all, observational estimates. (Abridged), Comment: 38 pages, 20 figures, BOSS collaboration paper; v2: fixed inconsistent definitions of DH, added references; v3: version accepted by PRD, corrected error resulting in significantly weaker constraints on decaying dark matter model
Published: 2014
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29. THE SDSS-IV EXTENDED BARYON OSCILLATION SPECTROSCOPIC SURVEY: LUMINOUS RED GALAXY TARGET SELECTION

Author: Prakash, Abhishek, Licquia, Timothy C, Newman, Jeffrey A, Ross, Ashley J, Myers, Adam D, Dawson, Kyle S, Kneib, Jean-Paul, Percival, Will J, Bautista, Julian E, Comparat, Johan, Tinker, Jeremy L, Schlegel, David J, Tojeiro, Rita, Ho, Shirley, Lang, Dustin, Rao, Sandhya M, McBride, Cameron K, Zhu, Guangtun Ben, Brownstein, Joel R, Bailey, Stephen, Bolton, Adam S, Delubac, Timothée, Mariappan, Vivek, Blanton, Michael R, Reid, Beth, Schneider, Donald P, Seo, Hee-Jong, Rosell, Aurelio Carnero, and Prada, Francisco
Subjects: Space Sciences, Physical Sciences, catalogs, cosmology: observations, galaxies: distances and redshifts, galaxies: general, galaxies: photometry, methods: data analysis, astro-ph.CO, astro-ph.GA, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural), Astronomy & Astrophysics, Astronomical sciences
Abstract: We describe the algorithm used to select the luminous red galaxy (LRG) sample for the extended Baryon Oscillation Spectroscopic Survey (eBOSS) of the Sloan Digital Sky Survey IV (SDSS-IV) using photometric data from both the SDSS and the Wide-field Infrared Survey Explorer. LRG targets are required to meet a set of color selection criteria and have z-band and i-band MODEL magnitudes z < 19.95 and 19.9 < i < 21.8, respectively. Our algorithm selects roughly 50 LRG targets per square degree, the great majority of which lie in the redshift range 0.6 < z < 1.0 (median redshift 0.71). We demonstrate that our methods are highly effective at eliminating stellar contamination and lower-redshift galaxies. We perform a number of tests using spectroscopic data from SDSS-III/BOSS ancillary programs to determine the redshift reliability of our target selection and its ability to meet the science requirements of eBOSS. The SDSS spectra are of high enough signal-to-noise ratio that at least ∼89% of the target sample yields secure redshift measurements. We also present tests of the uniformity and homogeneity of the sample, demonstrating that it should be clean enough for studies of the large-scale structure of the universe at higher redshifts than SDSS-III/BOSS LRGs reached.
Published: 2016

30. Large-scale clustering of Lyman α emission intensity from SDSS/BOSS

Author: Croft, Rupert AC, Miralda-Escudé, Jordi, Zheng, Zheng, Bolton, Adam, Dawson, Kyle S, Peterson, Jeffrey B, York, Donald G, Eisenstein, Daniel, Brinkmann, Jon, Brownstein, Joel, Cen, Renyue, Delubac, Timothée, Font-Ribera, Andreu, Hamilton, Jean-Christophe, Lee, Khee-Gan, Myers, Adam, Palanque-Delabrouille, Nathalie, Pâris, Isabelle, Petitjean, Patrick, Pieri, Matthew M, Ross, Nicholas P, Rossi, Graziano, Schlegel, David J, Schneider, Donald P, Slosar, Anže, Vazquez, José, Viel, Matteo, Weinberg, David H, and Yèche, Christophe
Subjects: Astronomical Sciences, Physical Sciences, cosmology: observations, Astronomical and Space Sciences, Astronomy & Astrophysics, Astronomical sciences, Particle and high energy physics, Space sciences
Abstract: We present a tentative detection of the large-scale structure of Ly α emission in the Universe at redshifts z = 2-3.5 by measuring the cross-correlation of Ly α surface brightness with quasars in Sloan Digital Sky Survey/Baryon Oscillation Spectroscopic Survey.We use amillion spectra targeting luminous red galaxies at z < 0.8, after subtracting a best-fitting model galaxy spectrum from each one, as an estimate of the high-redshift Ly α surface brightness. The quasar- Ly α emission cross-correlation is detected on scales 1 ~ 15 h-1 Mpc, with shape consistent with a Λ (CDM model with) Ωm = 0.30+0.10-0.07. The predicted amplitude of this cross-correlation is proportional to the product of the mean Ly α surface brightness, (μα), the amplitude of mass fluctuations and the quasar and Ly α emission bias factors. We infer (μα) (bα/3) = (3.9 ± 0.9) × 10-21 erg s-1 cm-2 Å-1 arcsec-2, where bα is the Ly α emission bias. If star-forming galaxies dominate this emission, we find ρSFR = (0.28 ± 0.07)(3/bα) yr-1 Mpc-3. For bα = 3, this value is~30 times larger than previous estimates from individually detected Ly α emitters, but consistent with the total ρSFR derived from dust-corrected, continuum UV galaxy surveys, if most of the Ly α photons from these galaxies avoid dust absorption and are reemitted after diffusing in large gas haloes. Heating of intergalactic gas by He II photoionization from quasar radiation or jets may alternatively explain the detected correlation, and cooling radiation from gas in galactic haloes may also contribute. We also detect redshift space anisotropy of the quasar-Ly α emission cross-correlation, finding evidence at the 3.0σ level that it is radially elongated, which may be explained by radiative-transfer effects. Our measurements represent the first application of the intensity mapping technique to optical observations.
Published: 2016

31. THE SDSS-IV EXTENDED BARYON OSCILLATION SPECTROSCOPIC SURVEY: OVERVIEW AND EARLY DATA

Author: Dawson, Kyle S, Kneib, Jean-Paul, Percival, Will J, Alam, Shadab, Albareti, Franco D, Anderson, Scott F, Armengaud, Eric, Aubourg, Éric, Bailey, Stephen, Bautista, Julian E, Berlind, Andreas A, Bershady, Matthew A, Beutler, Florian, Bizyaev, Dmitry, Blanton, Michael R, Blomqvist, Michael, Bolton, Adam S, Bovy, Jo, Brandt, WN, Brinkmann, Jon, Brownstein, Joel R, Burtin, Etienne, Busca, NG, Cai, Zheng, Chuang, Chia-Hsun, Clerc, Nicolas, Comparat, Johan, Cope, Frances, Croft, Rupert AC, Cruz-Gonzalez, Irene, da Costa, Luiz N, Cousinou, Marie-Claude, Darling, Jeremy, de la Macorra, Axel, de la Torre, Sylvain, Delubac, Timothée, du Mas des Bourboux, Hélion, Dwelly, Tom, Ealet, Anne, Eisenstein, Daniel J, Eracleous, Michael, Escoffier, S, Fan, Xiaohui, Finoguenov, Alexis, Font-Ribera, Andreu, Frinchaboy, Peter, Gaulme, Patrick, Georgakakis, Antonis, Green, Paul, Guo, Hong, Guy, Julien, Ho, Shirley, Holder, Diana, Huehnerhoff, Joe, Hutchinson, Timothy, Jing, Yipeng, Jullo, Eric, Kamble, Vikrant, Kinemuchi, Karen, Kirkby, David, Kitaura, Francisco-Shu, Klaene, Mark A, Laher, Russ R, Lang, Dustin, Laurent, Pierre, Le Goff, Jean-Marc, Li, Cheng, Liang, Yu, Lima, Marcos, Lin, Qiufan, Lin, Weipeng, Lin, Yen-Ting, Long, Daniel C, Lundgren, Britt, MacDonald, Nicholas, Maia, Marcio Antonio Geimba, Malanushenko, Elena, Malanushenko, Viktor, Mariappan, Vivek, McBride, Cameron K, McGreer, Ian D, Ménard, Brice, Merloni, Andrea, Meza, Andres, Montero-Dorta, Antonio D, Muna, Demitri, Myers, Adam D, Nandra, Kirpal, Naugle, Tracy, Newman, Jeffrey A, Noterdaeme, Pasquier, Nugent, Peter, Ogando, Ricardo, Olmstead, Matthew D, Oravetz, Audrey, Oravetz, Daniel J, Padmanabhan, Nikhil, Palanque-Delabrouille, Nathalie, Pan, Kaike, and Parejko, John K
Subjects: Astronomical Sciences, Physical Sciences, cosmology: observations, surveys, astro-ph.CO, Astronomical and Space Sciences, Astronomy & Astrophysics, Astronomical sciences, Particle and high energy physics
Abstract: In a six-year program started in 2014 July, the Extended Baryon Oscillation Spectroscopic Survey (eBOSS) will conduct novel cosmological observations using the BOSS spectrograph at Apache Point Observatory. These observations will be conducted simultaneously with the Time Domain Spectroscopic Survey (TDSS) designed for variability studies and the Spectroscopic Identification of eROSITA Sources (SPIDERS) program designed for studies of X-ray sources. In particular, eBOSS will measure with percent-level precision the distance-redshift relation with baryon acoustic oscillations (BAO) in the clustering of matter. eBOSS will use four different tracers of the underlying matter density field to vastly expand the volume covered by BOSS and map the large-scale-structures over the relatively unconstrained redshift range 0.6 < z < 2.2. Using more than 250,000 new, spectroscopically confirmed luminous red galaxies at a median redshift z = 0.72, we project that eBOSS will yield measurements of the angular diameter distance dA(z) to an accuracy of 1.2% and measurements of H(z) to 2.1% when combined with the z > 0.6 sample of BOSS galaxies. With ∼195,000 new emission line galaxy redshifts, we expect BAO measurements of dA(z) to an accuracy of 3.1% and H(z) to 4.7% at an effective redshift of z = 0.87. A sample of more than 500,000 spectroscopically confirmed quasars will provide the first BAO distance measurements over the redshift range 0.9 < z < 2.2, with expected precision of 2.8% and 4.2% on dA(z) and H(z), respectively. Finally, with 60,000 new quasars and re-observation of 60,000 BOSS quasars, we will obtain new Lyα forest measurements at redshifts z > 2.1; these new data will enhance the precision of dA(z) and H(z) at z > 2.1 by a factor of 1.44 relative to BOSS. Furthermore, eBOSS will provide improved tests of General Relativity on cosmological scales through redshift-space distortion measurements, improved tests for non-Gaussianity in the primordial density field, and new constraints on the summed mass of all neutrino species. Here, we provide an overview of the cosmological goals, spectroscopic target sample, demonstration of spectral quality from early data, and projected cosmological constraints from eBOSS.
Published: 2016

32. Using essential biodiversity variables to assess forest ecosystem integrity

Author: Dias, Arildo, primary, Van Houdt, Shaya, additional, Meschin, Katrin, additional, Von Stackelberg, Katherine, additional, Bago, Mari-Liis, additional, Baldarelli, Lauren, additional, Gonzalez Downs, Karen, additional, Luuk, Mariel, additional, Delubac, Timothée, additional, Bottagisio, Elio, additional, Kasak, Kuno, additional, Kebabci, Atilcan, additional, Levers, Oliver, additional, Miilvee, Igor, additional, Paju-Hamburg, Jana, additional, Poncet, Rémy, additional, Sanfilippo, Massimiliano, additional, Sildam, Jüri, additional, Stepanov, Dmitri, additional, and Karnauskaite, Donalda, additional
Published: 2023
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33. The 0.1<z<1.65 evolution of the bright end of the [OII] luminosity function

Author: Comparat, Johan, Richard, Johan, Kneib, Jean-Paul, Ilbert, Olivier, Gonzalez-Perez, V., Tresse, Laurence, Zoubian, Julien, Arnouts, Stephane, Bacon, Roland, Brownstein, Joel R., Baugh, Carlton, Delubac, Timothee, Ealet, Anne, Escoffier, Stephanie, Ge, Jian, Jullo, Eric, Lacey, Cedric, Ross, Nicholas P., Schlegel, David, Schneider, Donald P., Steele, Oliver, Tasca, Lidia, Yeche, Christophe, Lesser, Michael, Jiang, Zhaoji, Jing, Yipeng, Fan, Zhou, Fan, Xiaohui, Ma, Jun, Nie, Jundan, Wang, Jiali, Wu, Zhenyu, Zhang, Tianmeng, Zhou, Xu, Zhou, Zhimin, and Zou, Hu
Subjects: Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We present the [OII] luminosity function measured in the redshift range 0.1
Published: 2014
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34. Baryon Acoustic Oscillations in the Ly{\alpha} forest of BOSS DR11 quasars

Author: Delubac, Timothée, Bautista, Julian E., Busca, Nicolás G., Rich, James, Kirkby, David, Bailey, Stephen, Font-Ribera, Andreu, Slosar, Anže, Lee, Khee-Gan, Pieri, Matthew M., Hamilton, Jean-Christophe, Aubourg, Éric, Blomqvist, Michael, Bovy, Jo, Brinkmann, J., Carithers, William, Dawson, Kyle S., Eisenstein, Daniel J., Gontcho, Satya Gontcho A, Kneib, Jean-Paul, Goff, J. -M. Le, Margala, Daniel, Miralda-Escudé, Jordi, Myers, Adam D., Nichol, Robert C., Noterdaeme, Pasquier, O'Connell, Ross, Olmstead, Matthew D., Palanque-Delabrouille, Nathalie, Pâris, Isabelle, Petitjean, Patrick, Ross, Nicholas P., Rossi, Graziano, Schlegel, David J., Schneider, Donald P., Weinberg, David H., Yèche, Christophe, and York, Donald G.
Subjects: Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We report a detection of the baryon acoustic oscillation (BAO) feature in the flux-correlation function of the Ly{\alpha} forest of high-redshift quasars with a statistical significance of five standard deviations. The study uses 137,562 quasars in the redshift range $2.1\le z \le 3.5$ from the Data Release 11 (DR11) of the Baryon Oscillation Spectroscopic Survey (BOSS) of SDSS-III. This sample contains three times the number of quasars used in previous studies. The measured position of the BAO peak determines the angular distance, $D_A(z=2.34)$ and expansion rate, $H(z=2.34)$, both on a scale set by the sound horizon at the drag epoch, $r_d$. We find $D_A/r_d=11.28\pm0.65(1\sigma)^{+2.8}_{-1.2}(2\sigma)$ and $D_H/r_d=9.18\pm0.28(1\sigma)\pm0.6(2\sigma)$ where $D_H=c/H$. The optimal combination, $\sim D_H^{0.7}D_A^{0.3}/r_d$ is determined with a precision of $\sim2\%$. For the value $r_d=147.4~{\rm Mpc}$, consistent with the CMB power spectrum measured by Planck, we find $D_A(z=2.34)=1662\pm96(1\sigma)~{\rm Mpc}$ and $H(z=2.34)=222\pm7(1\sigma)~{\rm km\,s^{-1}Mpc^{-1}}$. Tests with mock catalogs and variations of our analysis procedure have revealed no systematic uncertainties comparable to our statistical errors. Our results agree with the previously reported BAO measurement at the same redshift using the quasar-Ly{\alpha} forest cross-correlation. The auto-correlation and cross-correlation approaches are complementary because of the quite different impact of redshift-space distortion on the two measurements. The combined constraints from the two correlation functions imply values of $D_A/r_d$ and $D_H/r_d$ that are, respectively, 7% low and 7% high compared to the predictions of a flat $\Lambda$CDM cosmological model with the best-fit Planck parameters. With our estimated statistical errors, the significance of this discrepancy is $\approx 2.5\sigma$., Comment: Accepted for publication in A&A. 17 pages, 18 figures
Published: 2014
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35. Cosmological implications of baryon acoustic oscillation measurements

Author: Aubourg, Éric, Bailey, Stephen, Bautista, Julian E, Beutler, Florian, Bhardwaj, Vaishali, Bizyaev, Dmitry, Blanton, Michael, Blomqvist, Michael, Bolton, Adam S, Bovy, Jo, Brewington, Howard, Brinkmann, J, Brownstein, Joel R, Burden, Angela, Busca, Nicolás G, Carithers, William, Chuang, Chia-Hsun, Comparat, Johan, Croft, Rupert AC, Cuesta, Antonio J, Dawson, Kyle S, Delubac, Timothée, Eisenstein, Daniel J, Font-Ribera, Andreu, Ge, Jian, Le Goff, J-M, Gontcho, Satya Gontcho A, Gott, J Richard, Gunn, James E, Guo, Hong, Guy, Julien, Hamilton, Jean-Christophe, Ho, Shirley, Honscheid, Klaus, Howlett, Cullan, Kirkby, David, Kitaura, Francisco S, Kneib, Jean-Paul, Lee, Khee-Gan, Long, Dan, Lupton, Robert H, Magaña, Mariana Vargas, Malanushenko, Viktor, Malanushenko, Elena, Manera, Marc, Maraston, Claudia, Margala, Daniel, McBride, Cameron K, Miralda-Escudé, Jordi, Myers, Adam D, Nichol, Robert C, Noterdaeme, Pasquier, Nuza, Sebastián E, Olmstead, Matthew D, Oravetz, Daniel, Pâris, Isabelle, Padmanabhan, Nikhil, Palanque-Delabrouille, Nathalie, Pan, Kaike, Pellejero-Ibanez, Marcos, Percival, Will J, Petitjean, Patrick, Pieri, Matthew M, Prada, Francisco, Reid, Beth, Rich, James, Roe, Natalie A, Ross, Ashley J, Ross, Nicholas P, Rossi, Graziano, Rubiño-Martín, Jose Alberto, Sánchez, Ariel G, Samushia, Lado, Santos, Ricardo Tanausú Génova, Scóccola, Claudia G, Schlegel, David J, Schneider, Donald P, Seo, Hee-Jong, Sheldon, Erin, Simmons, Audrey, Skibba, Ramin A, Slosar, Anže, Strauss, Michael A, Thomas, Daniel, Tinker, Jeremy L, Tojeiro, Rita, Vazquez, Jose Alberto, Viel, Matteo, Wake, David A, Weaver, Benjamin A, Weinberg, David H, Wood-Vasey, WM, Yèche, Christophe, Zehavi, Idit, and Zhao, Gong-Bo
Subjects: Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, astro-ph.CO, gr-qc, hep-ex
Abstract: We derive constraints on cosmological parameters and tests of dark energy models from the combination of baryon acoustic oscillation (BAO) measurements with cosmic microwave background (CMB) data and a recent reanalysis of Type Ia supernova (SN) data. In particular, we take advantage of high-precision BAO measurements from galaxy clustering and the Lyman-α forest (LyaF) in the SDSS-III Baryon Oscillation Spectroscopic Survey (BOSS). Treating the BAO scale as an uncalibrated standard ruler, BAO data alone yield a high confidence detection of dark energy; in combination with the CMB angular acoustic scale they further imply a nearly flat universe. Adding the CMB-calibrated physical scale of the sound horizon, the combination of BAO and SN data into an "inverse distance ladder" yields a measurement of H0=67.3±1.1 km s-1 Mpc-1, with 1.7% precision. This measurement assumes standard prerecombination physics but is insensitive to assumptions about dark energy or space curvature, so agreement with CMB-based estimates that assume a flat ΛCDM cosmology is an important corroboration of this minimal cosmological model. For constant dark energy (Λ), our BAO+SN+CMB combination yields matter density Ωm=0.301±0.008 and curvature Ωk=-0.003±0.003. When we allow more general forms of evolving dark energy, the BAO+SN+CMB parameter constraints are always consistent with flat ΛCDM values at ≈1σ. While the overall χ2 of model fits is satisfactory, the LyaF BAO measurements are in moderate (2-2.5σ) tension with model predictions. Models with early dark energy that tracks the dominant energy component at high redshift remain consistent with our expansion history constraints, and they yield a higher H0 and lower matter clustering amplitude, improving agreement with some low redshift observations. Expansion history alone yields an upper limit on the summed mass of neutrino species, mν
Published: 2015

36. Quasar-Lyman $\alpha$ Forest Cross-Correlation from BOSS DR11 : Baryon Acoustic Oscillations

Author: Font-Ribera, Andreu, Kirkby, David, Busca, Nicolas, Miralda-Escudé, Jordi, Ross, Nicholas P., Slosar, Anže, Rich, Jim, Aubourg, Éric, Bailey, Stephen, Bhardwaj, Vaishali, Bautista, Julian, Beutler, Florian, Bizyaev, Dmitry, Blomqvist, Michael, Brewington, Howard, Brinkmann, Jon, Brownstein, Joel R., Carithers, Bill, Dawson, Kyle S., Delubac, Timothée, Ebelke, Garrett, Eisenstein, Daniel J., Ge, Jian, Kinemuchi, Karen, Lee, Khee-Gan, Malanushenko, Viktor, Malanushenko, Elena, Marchante, Moses, Margala, Daniel, Muna, Demitri, Myers, Adam D., Noterdaeme, Pasquier, Oravetz, Daniel, Palanque-Delabrouille, Nathalie, Pâris, Isabelle, Petitjean, Patrick, Pieri, Matthew M., Rossi, Graziano, Schneider, Donald P., Simmons, Audrey, Viel, Matteo, Yeche, Christophe, and York, Donald G.
Subjects: Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We measure the large-scale cross-correlation of quasars with the Lyman alpha forest absorption, using over 164,000 quasars from Data Release 11 of the SDSS-III Baryon Oscillation Spectroscopic Survey. We extend the previous study of roughly 60,000 quasars from Data Release 9 to larger separations, allowing a measurement of the Baryonic Acoustic Oscillation (BAO) scale along the line of sight $c/(H(z=2.36) ~ r_s) = 9.0 \pm 0.3$ and across the line of sight $D_A(z=2.36) / ~ r_s = 10.8 \pm 0.4$, consistent with CMB and other BAO data. Using the best fit value of the sound horizon from Planck data ($r_s=147.49 Mpc$), we can translate these results to a measurement of the Hubble parameter of $H(z=2.36) = 226 \pm 8 km/s / Mpc$ and of the angular diameter distance of $D_A(z=2.36) = 1590 \pm 60 Mpc$. The measured cross-correlation function and an update of the code to fit the BAO scale (baofit) are made publicly available., Comment: 26 pages, 7 figures, version published by JCAP, with some extra comments suggested by the referee. Results unchanged from previous version
Published: 2013
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37. Baryon acoustic oscillations in the Lyα forest of BOSS DR11 quasars⋆

Author: Delubac, Timothée, Bautista, Julian E, Busca, Nicolás G, Rich, James, Kirkby, David, Bailey, Stephen, Font-Ribera, Andreu, Slosar, Anže, Lee, Khee-Gan, Pieri, Matthew M, Hamilton, Jean-Christophe, Aubourg, Éric, Blomqvist, Michael, Bovy, Jo, Brinkmann, Jon, Carithers, William, Dawson, Kyle S, Eisenstein, Daniel J, Gontcho, Satya Gontcho A, Kneib, Jean-Paul, Le Goff, Jean-Marc, Margala, Daniel, Miralda-Escudé, Jordi, Myers, Adam D, Nichol, Robert C, Noterdaeme, Pasquier, O’Connell, Ross, Olmstead, Matthew D, Palanque-Delabrouille, Nathalie, Pâris, Isabelle, Petitjean, Patrick, Ross, Nicholas P, Rossi, Graziano, Schlegel, David J, Schneider, Donald P, Weinberg, David H, Yèche, Christophe, and York, Donald G
Subjects: cosmology: observations, dark energy, large-scale structure of Universe, cosmological parameters, astro-ph.CO, Astronomical and Space Sciences, Astronomy & Astrophysics
Abstract: We report a detection of the baryon acoustic oscillation (BAO) feature in the three-dimensional correlation function of the transmitted flux fraction in the Lya forest of high-redshift quasars. The study uses 48 640 quasars in the redshift range 2.1 = z = 3.5 from the Baryon Oscillation Spectroscopic Survey (BOSS) of the third generation of the Sloan Digital Sky Survey (SDSS-III). At a mean redshift z = 2.3, we measure the monopole and quadrupole components of the correlation function for separations in the range 20 h-1 Mpc < r < 200 h-1 Mpc. A peak in the correlation function is seen at a separation equal to (1.01 ± 0.03) times the distance expected for the BAO peak within a concordance .CDM cosmology. This first detection of the BAO peak at high redshift, when the universe was strongly matter dominated, results in constraints on the angular diameter distance DA and the expansion rate H at z = 2.3 that, combined with priors on H0 and the baryon density, require the existence of dark energy. Combined with constraints derived from cosmic microwave background observations, this result implies H(z = 2.3) = (224 ± 8) km s-1 Mpc-1, indicating that the time derivative of the cosmological scale parameter .a = H(z = 2.3)/(1 + z) is significantly greater than that measured with BAO at z ∼ 0.5. This demonstrates that the expansion was decelerating in the range 0.7 < z < 2.3, as expected from the matter domination during this epoch. Combined with measurements of H0, one sees the pattern of deceleration followed by acceleration characteristic of a dark-energy dominated universe. © 2013 ESO.
Published: 2015

38. The Tenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Apache Point Observatory Galactic Evolution Experiment

Author: Ahn, Christopher P., Alexandroff, Rachael, Prieto, Carlos Allende, Anders, Friedrich, Anderson, Scott F., Anderton, Timothy, Andrews, Brett H., Aubourg, Éric, Bailey, Stephen, Bastien, Fabienne A., Bautista, Julian E., Beers, Timothy C., Beifiori, Alessandra, Bender, Chad F., Berlind, Andreas A., Beutler, Florian, Bhardwaj, Vaishali, Bird, Jonathan C., Bizyaev, Dmitry, Blake, Cullen H., Blanton, Michael R., Blomqvist, Michael, Bochanski, John J., Bolton, Adam S., Borde, Arnaud, Bovy, Jo, Bradley, Alaina Shelden, Brandt, W. N., Brauer, Dorothée, Brinkmann, J., Brownstein, Joel R., Busca, Nicolás G., Carithers, William, Carlberg, Joleen K., Carnero, Aurelio R., Carr, Michael A., Chiappini, Cristina, Chojnowski, S. Drew, Chuang, Chia-Hsun, Comparat, Johan, Crepp, Justin R., Cristiani, Stefano, Croft, Rupert A. C., Cuesta, Antonio J., Cunha, Katia, da Costa, Luiz N., Dawson, Kyle S., De Lee, Nathan, Dean, Janice D. R., Delubac, Timothée, Deshpande, Rohit, Dhital, Saurav, Ealet, Anne, Ebelke, Garrett L., Edmondson, Edward M., Eisenstein, Daniel J., Epstein, Courtney R., Escoffier, Stephanie, Esposito, Massimiliano, Evans, Michael L., Fabbian, D., Fan, Xiaohui, Favole, Ginevra, Castellá, Bruno Femenía, Alvar, Emma Fernández, Feuillet, Diane, Ak, Nurten Filiz, Finley, Hayley, Fleming, Scott W., Font-Ribera, Andreu, Frinchaboy, Peter M., Galbraith-Frew, J. G., García-Hernández, D. A., Pérez, Ana E. García, Ge, Jian, Génova-Santos, R., Gillespie, Bruce A., Girardi, Léo, Hernández, Jonay I. González, Gott III, J. Richard, Gunn, James E., Guo, Hong, Halverson, Samuel, Harding, Paul, Harris, David W., Hasselquist, Sten, Hawley, Suzanne L., Hayden, Michael, Hearty, Frederick R., Davó, Artemio Herrero, Ho, Shirley, Hogg, David W., Holtzman, Jon A., Honscheid, Klaus, Huehnerhoff, Joseph, Ivans, Inese I., Jackson, Kelly M., Jiang, Peng, Johnson, Jennifer A., Kirkby, David, Kinemuchi, K., Klaene, Mark A., Kneib, Jean-Paul, Koesterke, Lars, Lan, Ting-Wen, Lang, Dustin, Goff, Jean-Marc Le, Lee, Khee-Gan, Lee, Young Sun, Long, Daniel C., Loomis, Craig P., Lucatello, Sara, Lupton, Robert H., Ma, Bo, Mack III, Claude E., Mahadevan, Suvrath, Maia, Marcio A. G., Majewski, Steven R., Malanushenko, Elena, Malanushenko, Viktor, Manchado, A., Manera, Marc, Maraston, Claudia, Margala, Daniel, Martell, Sarah L., Masters, Karen L., McBride, Cameron K., McGreer, Ian D., McMahon, Richard G., Ménard, Brice, Mészáros, Sz., Miralda-Escudé, Jordi, Miyatake, Hironao, Montero-Dorta, Antonio D., Montesano, Francesco, More, Surhud, Morrison, Heather L., Muna, Demitri, Munn, Jeffrey A., Myers, Adam D., Nguyen, Duy Cuong, Nichol, Robert C., Nidever, David L., Noterdaeme, Pasquier, Nuza, Sebastián E., O'Connell, Julia E., O'Connell, Robert W., O'Connell, Ross, Olmstead, Matthew D., Oravetz, Daniel J., Owen, Russell, Padmanabhan, Nikhil, Palanque-Delabrouille, Nathalie, Pan, Kaike, Parejko, John K., Pâris, Isabelle, Pepper, Joshua, Percival, Will J., Pérez-Ràfols, Ignasi, Perottoni, Hélio Dotto, Petitjean, Patrick, Pieri, Matthew M., Pinsonneault, M. H., Prada, Francisco, Price-Whelan, Adrian M., Raddick, M. Jordan, Rahman, Mubdi, Rebolo, Rafael, Reid, Beth A., Richards, Jonathan C., Riffel, Rogério, Robin, Annie C., Rocha-Pinto, H. J., Rockosi, Constance M., Roe, Natalie A., Ross, Ashley J., Ross, Nicholas P., Rossi, Graziano, Roy, Arpita, Rubiño-Martin, J. A., Sabiu, Cristiano G., Sánchez, Ariel G., Santiago, Basílio, Sayres, Conor, Schiavon, Ricardo P., Schlegel, David J., Schlesinger, Katharine J., Schmidt, Sarah J., Schneider, Donald P., Schultheis, Mathias, Sellgren, Kris, Seo, Hee-Jong, Shen, Yue, Shetrone, Matthew, Shu, Yiping, Simmons, Audrey E., Skrutskie, M. F., Slosar, Anže, Smith, Verne V., Snedden, Stephanie A., Sobeck, Jennifer S., Sobreira, Flavia, Stassun, Keivan G., Steinmetz, Matthias, Strauss, Michael A., Streblyanska, Alina, Suzuki, Nao, Swanson, Molly E. C., Terrien, Ryan C., Thakar, Aniruddha R., Thomas, Daniel, Thompson, Benjamin A., Tinker, Jeremy L., Tojeiro, Rita, Troup, Nicholas W., Vandenberg, Jan, Magaña, Mariana Vargas, Viel, Matteo, Vogt, Nicole P., Wake, David A., Weaver, Benjamin A., Weinberg, David H., Weiner, Benjamin J., White, Martin, White, Simon D. M., Wilson, John C., Wisniewski, John P., Wood-Vasey, W. M., Yèche, Christophe, York, Donald G., Zamora, O., Zasowski, Gail, Zehavi, Idit, Zheng, Zheng, and Zhu, Guangtun
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Astrophysics of Galaxies
Abstract: The Sloan Digital Sky Survey (SDSS) has been in operation since 2000 April. This paper presents the tenth public data release (DR10) from its current incarnation, SDSS-III. This data release includes the first spectroscopic data from the Apache Point Observatory Galaxy Evolution Experiment (APOGEE), along with spectroscopic data from the Baryon Oscillation Spectroscopic Survey (BOSS) taken through 2012 July. The APOGEE instrument is a near-infrared R~22,500 300-fiber spectrograph covering 1.514--1.696 microns. The APOGEE survey is studying the chemical abundances and radial velocities of roughly 100,000 red giant star candidates in the bulge, bar, disk, and halo of the Milky Way. DR10 includes 178,397 spectra of 57,454 stars, each typically observed three or more times, from APOGEE. Derived quantities from these spectra (radial velocities, effective temperatures, surface gravities, and metallicities) are also included.DR10 also roughly doubles the number of BOSS spectra over those included in the ninth data release. DR10 includes a total of 1,507,954 BOSS spectra, comprising 927,844 galaxy spectra; 182,009 quasar spectra; and 159,327 stellar spectra, selected over 6373.2 square degrees., Comment: 15 figures; 1 table. Accepted to ApJS. DR10 is available at http://www.sdss3.org/dr10 v3 fixed 3 diacritic markings in the arXiv HTML listing of the author names
Published: 2013
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39. The one-dimensional Ly-alpha forest power spectrum from BOSS

Author: Palanque-Delabrouille, Nathalie, Yèche, Christophe, Borde, Arnaud, Goff, Jean-Marc Le, Rossi, Graziano, Viel, Matteo, Aubourg, Éric, Bailey, Stephen, Bautista, Julian, Blomqvist, Michael, Bolton, Adam, Bolton, James S., Busca, Nicolás G., Carithers, Bill, Croft, Rupert A. C., Dawson, Kyle S., Delubac, Timothée, Font-Ribera, Andreu, Ho, Shirley, Kirkby, David, Lee, Khee-Gan, Margala, Daniel, Miralda-Escudé, Jordi, Muna, Demitri, Myers, Adam D., Noterdaeme, Pasquier, Pâris, Isabelle, Petitjean, Patrick, Pieri, Matthew M., Rich, James, Rollinde, Emmanuel, Ross, Nicholas P., Schlegel, David J., Schneider, Donald P., Slosar, Anže, and Weinberg, David H.
Subjects: Astrophysics - Cosmology and Extragalactic Astrophysics
Abstract: We have developed two independent methods to measure the one-dimensional power spectrum of the transmitted flux in the Lyman-$\alpha$ forest. The first method is based on a Fourier transform, and the second on a maximum likelihood estimator. The two methods are independent and have different systematic uncertainties. The determination of the noise level in the data spectra was subject to a novel treatment, because of its significant impact on the derived power spectrum. We applied the two methods to 13,821 quasar spectra from SDSS-III/BOSS DR9 selected from a larger sample of over 60,000 spectra on the basis of their high quality, large signal-to-noise ratio, and good spectral resolution. The power spectra measured using either approach are in good agreement over all twelve redshift bins from $ = 2.2$ to $ = 4.4$, and scales from 0.001 $\rm(km/s)^{-1}$ to $0.02 \rm(km/s)^{-1}$. We determine the methodological and instrumental systematic uncertainties of our measurements. We provide a preliminary cosmological interpretation of our measurements using available hydrodynamical simulations. The improvement in precision over previously published results from SDSS is a factor 2--3 for constraints on relevant cosmological parameters. For a $\Lambda$CDM model and using a constraint on $H_0$ that encompasses measurements based on the local distance ladder and on CMB anisotropies, we infer $\sigma_8 =0.83\pm0.03$ and $n_s= 0.97\pm0.02$ based on \ion{H}{i} absorption in the range $2.1
Published: 2013
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40. Measurement of Baryon Acoustic Oscillations in the Lyman-alpha Forest Fluctuations in BOSS Data Release 9

Author: Slosar, Anže, Iršič, Vid, Kirkby, David, Bailey, Stephen, Busca, Nicolás G., Delubac, Timothée, Rich, James, Aubourg, Éric, Bautista, Julian E., Bhardwaj, Vaishali, Blomqvist, Michael, Bolton, Adam S., Bovy, Jo, Brownstein, Joel, Carithers, Bill, Croft, Rupert A. C., Dawson, Kyle S., Font-Ribera, Andreu, Goff, J. -M. Le, Ho, Shirley, Honscheid, Klaus, Lee, Khee-Gan, Margala, Daniel, McDonald, Patrick, Medolin, Bumbarija, Miralda-Escudé, Jordi, Myers, Adam D., Nichol, Robert C., Noterdaeme, Pasquier, Palanque-Delabrouille, Nathalie, Pâris, Isabelle, Petitjean, Patrick, Pieri, Matthew M., Piškur, Yodovina, Roe, Natalie A., Ross, Nicholas P., Rossi, Graziano, Schlegel, David J., Schneider, Donald P., Sheldon, Erin S., Seljak, Uroš, Viel, Matteo, Weinberg, David H., and Yèche, Christophe
Subjects: Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Experiment
Abstract: We use the Baryon Oscillation Spectroscopic Survey (BOSS) Data Release 9 (DR9) to detect and measure the position of the Baryonic Acoustic Oscillation (BAO) feature in the three-dimensional correlation function in the Lyman-alpha forest flux fluctuations at a redshift z=2.4. The feature is clearly detected at significance between 3 and 5 sigma (depending on the broadband model and method of error covariance matrix estimation) and is consistent with predictions of the standard LCDM model. We assess the biases in our method, stability of the error covariance matrix and possible systematic effects. We fit the resulting correlation function with several models that decouple the broadband and acoustic scale information. For an isotropic dilation factor, we measure 100x(alpha_iso-1) = -1.6 ^{+2.0+4.3+7.4}_{-2.0-4.1-6.8} (stat.) +/- 1.0 (syst.) (multiple statistical errors denote 1,2 and 3 sigma confidence limits) with respect to the acoustic scale in the fiducial cosmological model (flat LCDM with Omega_m=0.27, h=0.7). When fitting separately for the radial and transversal dilation factors we find marginalised constraints 100x(alpha_par-1) = -1.3 ^{+3.5+7.6 +12.3}_{-3.3-6.7-10.2} (stat.) +/- 2.0 (syst.) and 100x(alpha_perp-1) = -2.2 ^{+7.4+17}_{-7.1-15} +/- 3.0 (syst.). The dilation factor measurements are significantly correlated with cross-correlation coefficient of ~ -0.55. Errors become significantly non-Gaussian for deviations over 3 standard deviations from best fit value. Because of the data cuts and analysis method, these measurements give tighter constraints than a previous BAO analysis of the BOSS DR9 Lyman-alpha forest sample, providing an important consistency test of the standard cosmological model in a new redshift regime., Comment: v2: replaced with version accepted by JCAP: a few co-authors, modest expansion and clarification of the text, references added, no change in results
Published: 2013
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41. Fitting Methods for Baryon Acoustic Oscillations in the Lyman-{\alpha} Forest Fluctuations in BOSS Data Release 9

Author: Kirkby, David, Margala, Daniel, Slosar, Anže, Bailey, Stephen, Busca, Nicolás G., Delubac, Timothée, Rich, James, Blomqvist, Michael, Brownstein, Joel R., Carithers, Bill, Croft, Rupert A. C., Dawson, Kyle S., Font-Ribera, Andreu, Miralda-Escudé, Jordi, Myers, Adam D., Nichol, Robert C., Palanque-Delabrouille, Nathalie, Pâris, Isabelle, Petitjean, Patrick, Rossi, Graziano, Schlegel, David J., Schneider, Donald P., Viel, Matteo, Weinberg, David H., and Yèche, Christophe
Subjects: Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We describe fitting methods developed to analyze fluctuations in the Lyman-{\alpha} forest and measure the parameters of baryon acoustic oscillations (BAO). We apply our methods to BOSS Data Release 9. Our method is based on models of the three-dimensional correlation function in physical coordinate space, and includes the effects of redshift-space distortions, anisotropic non-linear broadening, and broadband distortions. We allow for independent scale factors along and perpendicular to the line of sight to minimize the dependence on our assumed fiducial cosmology and to obtain separate measurements of the BAO angular and relative velocity scales. Our fitting software and the input files needed to reproduce our main BOSS Data Release 9 results are publicly available., Comment: Submitted to JCAP, 38 pages, 26 figures
Published: 2013
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42. The BOSS Lyman-alpha Forest Sample from SDSS Data Release 9

Author: Lee, Khee-Gan, Bailey, Stephen, Bartsch, Leslie E., Carithers, William, Dawson, Kyle S., Kirkby, David, Lundgren, Britt, Margala, Daniel, Palanque-Delabrouille, Nathalie, Pieri, Matthew M., Schlegel, David J., Weinberg, David H., Yeche, Christophe, Aubourg, Eric, Bautista, Julian, Bizyaev, Dmitry, Blomqvist, Michael, Bolton, Adam S., Borde, Arnaud, Brewington, Howard, Busca, Nicolas G., Croft, Rupert A. C., Delubac, Timothee, Ebelke, Garrett, Eisenstein, Daniel J., Font-Ribera, Andreu, Ge, Jian, Hamilton, Jean-Christophe, Hennawi, Joseph F., Ho, Shirley, Honscheid, Klaus, Goff, Jean-Marc Le, Malanushenko, Elena, Malanushenko, Viktor, Miralda-Escude, Jordi, Myers, Adam D., Noterdaeme, Pasquier, Oravetz, Daniel, Pan, Kaike, Paris, Isabelle, Petitjean, Patrick, Rich, James, Rollinde, Emmanuel, Ross, Nicholas P., Rossi, Graziano, Schneider, Donald P., Simmons, Audrey, Snedden, Stephanie, Slosar, Anze, Spergel, David N., Suzuki, Nao, Viel, Matteo, and Weaver, Benjamin A.
Subjects: Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We present the BOSS Lyman-alpha (Lya) Forest Sample from SDSS Data Release 9, comprising 54,468 quasar spectra with zqso > 2.15 suitable for Lya forest analysis. This data set probes the intergalactic medium with absorption redshifts 2.0 < z_alpha < 5.7 over an area of 3275 square degrees, and encompasses an approximate comoving volume of 20 h^-3 Gpc^3. With each spectrum, we have included several products designed to aid in Lya forest analysis: improved sky masks that flag pixels where data may be unreliable, corrections for known biases in the pipeline estimated noise, masks for the cores of damped Lya systems and corrections for their wings, and estimates of the unabsorbed continua so that the observed flux can be converted to a fractional transmission. The continua are derived using a principal component fit to the quasar spectrum redwards of restframe Lya (lambda > 1216 Ang), extrapolated into the forest region and normalized by a linear function to fit the expected evolution of the Lya forest mean-flux. The estimated continuum errors are ~5% rms. We also discuss possible systematics arising from uncertain spectrophotometry and artifacts in the flux calibration; global corrections for the latter are provided. Our sample provides a convenient starting point for users to analyze clustering in BOSS Lya forest data, and it provides a fiducial data set that can be used to compare results from different analyses of baryon acoustic oscillations in the Lya forest. The full data set is available from the SDSS-III DR9 web site., Comment: 15 pages, 11 figures; Submitted to AJ
Published: 2012
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43. Baryon Acoustic Oscillations in the Ly-\alpha\ forest of BOSS quasars

Author: Busca, Nicolás G., Delubac, Timothée, Rich, James, Bailey, Stephen, Font-Ribera, Andreu, Kirkby, David, Goff, J. -M. Le, Pieri, Matthew M., Slosar, Anze, Aubourg, Éric, Bautista, Julian E., Bizyaev, Dmitry, Blomqvist, Michael, Bolton, Adam S., Bovy, Jo, Brewington, Howard, Borde, Arnaud, Brinkmann, J., Carithers, Bill, Croft, Rupert A. C., Dawson, Kyle S., Ebelke, Garrett, Eisenstein, Daniel J., Hamilton, Jean-Christophe, Ho, Shirley, Hogg, David W., Honscheid, Klaus, Lee, Khee-Gan, Lundgren, Britt, Malanushenko, Elena, Malanushenko, Viktor, Margala, Daniel, Maraston, Claudia, Mehta, Kushal, Miralda-Escudé, Jordi, Myers, Adam D., Nichol, Robert C., Noterdaeme, Pasquier, Olmstead, Matthew D., Oravetz, Daniel, Palanque-Delabrouille, Nathalie, Pan, Kaike, Pâris, Isabelle, Percival, Will J., Petitjean, Patrick, Roe, N. A., Rollinde, Emmanuel, Ross, Nicholas P., Rossi, Graziano, Schlegel, David J., Schneider, Donald P., Shelden, Alaina, Sheldon, Erin S., Simmons, Audrey, Snedden, Stephanie, Tinker, Jeremy L., Viel, Matteo, Weaver, Benjamin A., Weinberg, David H., White, Martin, Yèche, Christophe, and York, Donald G.
Subjects: Astrophysics - Cosmology and Extragalactic Astrophysics
Abstract: We report a detection of the baryon acoustic oscillation (BAO) feature in the three-dimensional correlation function of the transmitted flux fraction in the \Lya forest of high-redshift quasars. The study uses 48,640 quasars in the redshift range $2.1\le z \le 3.5$ from the Baryon Oscillation Spectroscopic Survey (BOSS) of the third generation of the Sloan Digital Sky Survey (SDSS-III). At a mean redshift $z=2.3$, we measure the monopole and quadrupole components of the correlation function for separations in the range $20\hMpc
Published: 2012
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44. The Sloan Digital Sky Survey quasar catalog: ninth data release

Author: Pâris, Isabelle, Petitjean, Patrick, Aubourg, Eric, Bailey, Stephen, Ross, Nicholas P., Myers, Adam D., Strauss, Michael A., Anderson, Scott F., Arnau, Eduard, Bautista, Julian, Bizyaev, Dmitry, Bolton, Adam S., Bovy, Jo, Brandt, William N., Brewington, Howard, Brownstein, Joel R., Busca, Nicolas, Capellupo, Daniel, Carithers, William, Croft, Rupert A. C., Dawson, Kyle, Delubac, Timothée, Ebelke, Garrett, Eisenstein, Daniel J., Engelke, Philip, Fan, Xiaohui, Ak, Nur Filiz, Finley, Hayley, Font-Ribera, Andreu, Ge, Jian, Gibson, Robert R., Hall, Patrick B., Hamann, Fred, Hennawi, Joseph F., Ho, Shirley, Hogg, David W., Ivezic, Zeljko, Jiang, Linhua, Kimball, Amy E., Kirkby, David, Kirkpatrick, Jessica A., Lee, Khee-Gan, Goff, Jean-Marc Le, Lundgren, Britt, MacLeod, Chelsea L., Malanushenko, Elena, Malanushenko, Viktor, Maraston, Claudia, McGreer, Ian D., McMahon, Richard G., Miralda-Escudé, Jordi, Muna, Demitri, Noterdaeme, Pasquier, Oravetz, Daniel, Palanque-Delabrouille, Nathalie, Pan, Kaike, Perez-Fournon, Ismaël, Pieri, Matthew M., Richards, Gordon T., Rollinde, Emmanuel, Sheldon, Erin S., Schlegel, David J., Schneider, Donald P., Slosar, Anze, Shelden, Alaina, Shen, Yue, Simmons, Audrey, Snedden, Stephanie, Suzuki, Nao, Tinker, Jeremy, Viel, Matteo, Weaver, Benjamin A., Weinberg, David H., White, Martin, Wood-Vasey, W. Michael, and Yèche, Christophe
Subjects: Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We present the Data Release 9 Quasar (DR9Q) catalog from the Baryon Oscillation Spectroscopic Survey (BOSS) of the Sloan Digital Sky Survey III. The catalog includes all BOSS objects that were targeted as quasar candidates during the survey, are spectrocopically confirmed as quasars via visual inspection, have luminosities Mi[z=2]<-20.5 (in a $\Lambda$CDM cosmology with H0 = 70 km/s/Mpc, $\Omega_{\rm M}$ = 0.3, and $\Omega_{\Lambda}$ = 0.7) and either display at least one emission line with full width at half maximum (FWHM) larger than 500 km/s or, if not, have interesting/complex absorption features. It includes as well, known quasars (mostly from SDSS-I and II) that were reobserved by BOSS. This catalog contains 87,822 quasars (78,086 are new discoveries) detected over 3,275 deg$^{2}$ with robust identification and redshift measured by a combination of principal component eigenspectra newly derived from a training set of 8,632 spectra from SDSS-DR7. The number of quasars with $z>2.15$ (61,931) is ~2.8 times larger than the number of z>2.15 quasars previously known. Redshifts and FWHMs are provided for the strongest emission lines (CIV, CIII], MgII). The catalog identifies 7,533 broad absorption line quasars and gives their characteristics. For each object the catalog presents five-band (u,g,r,i,z) CCD-based photometry with typical accuracy of 0.03 mag, and information on the morphology and selection method. The catalog also contains X-ray, ultraviolet, near-infrared, and radio emission properties of the quasars, when available, from other large-area surveys., Comment: Accepted for publication in A&A, Catalog available online at http://www.sdss3.org/dr9/algorithms/qso_catalog.php
Published: 2012
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45. The Baryon Oscillation Spectroscopic Survey of SDSS-III

Author: Dawson, Kyle S., Schlegel, David J., Ahn, Christopher P., Anderson, Scott F., Aubourg, Éric, Bailey, Stephen, Barkhouser, Robert H., Bautista, Julian E., Beifiori, Alessandra, Berlind, Andreas A., Bhardwaj, Vaishali, Bizyaev, Dmitry, Blake, Cullen H., Blanton, Michael R., Blomqvist, Michael, Bolton, Adam S., Borde, Arnaud, Bovy, Jo, Brandt, W. N., Brewington, Howard, Brinkmann, Jon, Brown, Peter J., Brownstein, Joel R., Bundy, Kevin, Busca, N. G., Carithers, William, Carnero, Aurelio R., Carr, Michael A., Chen, Yanmei, Comparat, Johan, Connolly, Natalia, Cope, Frances, Croft, Rupert A. C., Cuesta, Antonio J., da Costa, Luiz N., Davenport, James R. A., Delubac, Timothée, de Putter, Roland, Dhital, Saurav, Ealet, Anne, Ebelke, Garrett L., Eisenstein, Daniel J., Escoffier, S., Fan, Xiaohui, Ak, N. Filiz, Finley, Hayley, Font-Ribera, Andreu, Génova-Santos, R., Gunn, James E., Guo, Hong, Haggard, Daryl, Hall, Patrick B., Hamilton, Jean-Christophe, Harris, Ben, Harris, David W., Ho, Shirley, Hogg, David W., Holder, Diana, Honscheid, Klaus, Huehnerhoff, Joe, Jordan, Beatrice, Jordan, Wendell P., Kauffmann, Guinevere, Kazin, Eyal A., Kirkby, David, Klaene, Mark A., Kneib, Jean-Paul, Goff, Jean-Marc Le, Lee, Khee-Gan, Long, Daniel C., Loomis, Craig P., Lundgren, Britt, Lupton, Robert H., Maia, Marcio A. G., Makler, Martin, Malanushenko, Elena, Malanushenko, Viktor, Mandelbaum, Rachel, Manera, Marc, Maraston, Claudia, Margala, Daniel, Masters, Karen L., McBride, Cameron K., McDonald, Patrick, McGreer, Ian D., McMahon, Richard, Mena, Olga, Miralda-Escudé, Jordi, Montero-Dorta, Antonio D., Montesano, Francesco, Muna, Demitri, Myers, Adam D., Naugle, Tracy, Nichol, Robert C., Noterdaeme, Pasquier, Nuza, Sebastián E., Olmstead, Matthew D., Oravetz, Audrey, Oravetz, Daniel J., Owen, Russell, Padmanabhan, Nikhil, Palanque-Delabrouille, Nathalie, Pan, Kaike, Parejko, John K., Pâris, Isabelle, Percival, Will J., Pérez-Fournon, Ismael, Pérez-Ràfols, Ignasi, Petitjean, Patrick, Pfaffenberger, Robert, Pforr, Janine, Pieri, Matthew M., Prada, Francisco, Price-Whelan, Adrian M., Raddick, M. Jordan, Rebolo, Rafael, Rich, James, Richards, Gordon T., Rockosi, Constance M., Roe, Natalie A., Ross, Ashley J., Ross, Nicholas P., Rossi, Graziano, Rubiño-Martin, J. A., Samushia, Lado, Sánchez, Ariel G., Sayres, Conor, Schmidt, Sarah J., Schneider, Donald P., Scóccola, C. G., Seo, Hee-Jong, Shelden, Alaina, Sheldon, Erin, Shen, Yue, Shu, Yiping, Slosar, Anže, Smee, Stephen A., Snedden, Stephanie A., Stauffer, Fritz, Steele, Oliver, Strauss, Michael A., Streblyanska, Alina, Suzuki, Nao, Swanson, Molly E. C., Tal, Tomer, Tanaka, Masayuki, Thomas, Daniel, Tinker, Jeremy L., Tojeiro, Rita, Tremonti, Christy A., Magana, M. Vargas, Verde, Licia, Viel, Matteo, Wake, David A., Watson, Mike, Weaver, Benjamin A., Weinberg, David H., Weiner, Benjamin J., West, Andrew A., White, Martin, Wood-Vasey, W. M., Yeche, Christophe, Zehavi, Idit, Zhao, Gong-Bo, and Zheng, Zheng
Subjects: Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: The Baryon Oscillation Spectroscopic Survey (BOSS) is designed to measure the scale of baryon acoustic oscillations (BAO) in the clustering of matter over a larger volume than the combined efforts of all previous spectroscopic surveys of large scale structure. BOSS uses 1.5 million luminous galaxies as faint as i=19.9 over 10,000 square degrees to measure BAO to redshifts z<0.7. Observations of neutral hydrogen in the Lyman alpha forest in more than 150,000 quasar spectra (g<22) will constrain BAO over the redshift range 2.15
Published: 2012
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46. The Ninth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Baryon Oscillation Spectroscopic Survey

Author: Collaboration, SDSS-III, Ahn, Christopher P., Alexandroff, Rachael, Prieto, Carlos Allende, Anderson, Scott F., Anderton, Timothy, Andrews, Brett H., Bailey, Éric Aubourg Stephen, Barnes, Rory, Bautista, Julian, Beers, Timothy C., Beifiori, Alessandra, Berlind, Andreas A., Bhardwaj, Vaishali, Bizyaev, Dmitry, Blake, Cullen H., Blanton, Michael R., Blomqvist, Michael, Bochanski, John J., Bolton, Adam S., Borde, Arnaud, Bovy, Jo, Brandt, W. N., Brinkmann, J., Brown, Peter J., Brownstein, Joel R., Bundy, Kevin, Busca, N. G., Carithers, William, Carnero, Aurelio R., Carr, Michael A., Casetti-Dinescu, Dana I., Chen, Yanmei, Chiappini, Cristina, Comparat, Johan, Connolly, Natalia, Crepp, Justin R., Cristiani, Stefano, Croft, Rupert A. C., Cuesta, Antonio J., da Costa, Luiz N., Davenport, James R. A., Dawson, Kyle S., de Putter, Roland, De Lee, Nathan, Delubac, Timothée, Dhital, Saurav, Ealet, Anne, Ebelke, Garrett L., Edmondson, Edward M., Eisenstein, Daniel J., Escoffier, S., Esposito, Massimiliano, Evans, Michael L., Fan, Xiaohui, Castellá, Bruno Femení a, Alvar, Emma Fernández, Ferreira, Leticia D., Ak, N. Filiz, Finley, Hayley, Fleming, Scott W., Font-Ribera, Andreu, Frinchaboy, Peter M., García-Hernández, D. A., Pérez, A. E. García, Ge, Jian, Génova-Santos, R., Gillespie, Bruce A., Girardi, Léo, Hernández, Jonay I. González, Grebel, Eva K., Gunn, James E., Haggard, Daryl, Hamilton, Jean-Christophe, Harris, David W., Hawley, Suzanne L., Hearty, Frederick R., Ho, Shirley, Hogg, David W., Holtzman, Jon A., Honscheid, Klaus, Huehnerhoff, J., Ivans, Inese I., Ivezić, Zeljko, Jacobson, Heather R., Jiang, Linhua, Johansson, Jonas, Johnson, Jennifer A., Kauffmann, Guinevere, Kirkby, David, Kirkpatrick, Jessica A., Klaene, Mark A., Knapp, Gillian R., Kneib, Jean-Paul, Goff, Jean-Marc Le, Leauthaud, Alexie, Lee, Khee-Gan, Lee, Young Sun, Long, Daniel C., Loomis, Craig P., Lucatello, Sara, Lundgren, Britt, Lupton, Robert H., Ma, Bo, Ma, Zhibo, MacDonald, Nicholas, Mahadevan, Suvrath, Maia, Marcio A. G., Majewski, Steven R., Makler, Martin, Malanushenko, Elena, Malanushenko, Viktor, Manchado, A., Mandelbaum, Rachel, Manera, Marc, Maraston, Claudia, Margala, Daniel, Martell, Sarah L., McBride, Cameron K., McGreer, Ian D., McMahon, Richard G., Ménard, Brice, Meszaros, Sz., Miralda-Escudé, Jordi, Montero-Dorta, Antonio D., Montesano, Francesco, Morrison, Heather L., Muna, Demitri, Munn, Jeffrey A., Murayama, Hitoshi, Myers, Adam D., Neto, A. F., Nguyen, Duy Cuong, Nichol, Robert C., Nidever, David L., Noterdaeme, Pasquier, Ogando, Ricardo L. C., Olmstead, Matthew D., Oravetz, Daniel J., Owen, Russell, Padmanabhan, Nikhil, Palanque-Delabrouille, Nathalie, Pan, Kaike, Parejko, John K., Parihar, Prachi, Pâris, Isabelle, Pattarakijwanich, Petchara, Pepper, Joshua, Percival, Will J., Pérez-Fournon, Ismael, Pérez-Ráfols, Ignasi, Petitjean, Patrick, Pforr, Janine, Pieri, Matthew M., Pinsonneault, Marc H., de Mello, G. F. Porto, Prada, Francisco, Price-Whelan, Adrian M., Raddick, M. Jordan, Rebolo, Rafael, Rich, James, Richards, Gordon T., Robin, Annie C., Rocha-Pinto, Helio J., Rockosi, Constance M., Roe, Natalie A., Ross, Ashley J., Ross, Nicholas P., Rubiño-Martin, J. A., Samushia, Lado, Almeida, J. Sanchez, Sánchez, Ariel G., Santiago, Basílio, Sayres, Conor, Schlegel, David J., Schlesinger, Katharine J., Schmidt, Sarah J., Schneider, Donald P., Schwope, Axel D., Scóccola, C. G., Seljak, Uros, Sheldon, Erin, Shen, Yue, Shu, Yiping, Simmerer, Jennifer, Simmons, Audrey E., Skibba, Ramin A., Slosar, A., Sobreira, Flavia, Sobeck, Jennifer S., Stassun, Keivan G., Steele, Oliver, Steinmetz, Matthias, Strauss, Michael A., Swanson, Molly E. C., Tal, Tomer, Thakar, Aniruddha R., Thomas, Daniel, Thompson, Benjamin A., Tinker, Jeremy L., Tojeiro, Rita, Tremonti, Christy A., Magaña, M. Vargas, Verde, Licia, Viel, Matteo, Vikas, Shailendra K., Vogt, Nicole P., Wake, David A., Wang, Ji, Weaver, Benjamin A., Weinberg, David H., Weiner, Benjamin J., West, Andrew A., White, Martin, Wilson, John C., Wisniewski, John P., Wood-Vasey, W. M., Yanny, Brian, Yèche, Christophe, York, Donald G., Zamora, O., Zasowski, Gail, Zehavi, Idit, Zhao, Gong-Bo, Zheng, Zheng, Zhu, Guangtun, and Zinn, Joel C.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: The Sloan Digital Sky Survey III (SDSS-III) presents the first spectroscopic data from the Baryon Oscillation Spectroscopic Survey (BOSS). This ninth data release (DR9) of the SDSS project includes 535,995 new galaxy spectra (median z=0.52), 102,100 new quasar spectra (median z=2.32), and 90,897 new stellar spectra, along with the data presented in previous data releases. These spectra were obtained with the new BOSS spectrograph and were taken between 2009 December and 2011 July. In addition, the stellar parameters pipeline, which determines radial velocities, surface temperatures, surface gravities, and metallicities of stars, has been updated and refined with improvements in temperature estimates for stars with T_eff<5000 K and in metallicity estimates for stars with [Fe/H]>-0.5. DR9 includes new stellar parameters for all stars presented in DR8, including stars from SDSS-I and II, as well as those observed as part of the SDSS-III Sloan Extension for Galactic Understanding and Exploration-2 (SEGUE-2). The astrometry error introduced in the DR8 imaging catalogs has been corrected in the DR9 data products. The next data release for SDSS-III will be in Summer 2013, which will present the first data from the Apache Point Observatory Galactic Evolution Experiment (APOGEE) along with another year of data from BOSS, followed by the final SDSS-III data release in December 2014., Comment: 9 figures; 2 tables. Submitted to ApJS. DR9 is available at http://www.sdss3.org/dr9
Published: 2012
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47. Quasar-Lyman α forest cross-correlation from BOSS DR11: Baryon Acoustic Oscillations

Author: Font-Ribera, Andreu, Kirkby, David, Busca, Nicolas, Miralda-Escudé, Jordi, Ross, Nicholas P, Slosar, Anže, Rich, James, Aubourg, Éric, Bailey, Stephen, Bhardwaj, Vaishali, Bautista, Julian, Beutler, Florian, Bizyaev, Dmitry, Blomqvist, Michael, Brewington, Howard, Brinkmann, Jon, Brownstein, Joel R, Carithers, Bill, Dawson, Kyle S, Delubac, Timothée, Ebelke, Garrett, Eisenstein, Daniel J, Ge, Jian, Kinemuchi, Karen, Lee, Khee-Gan, Malanushenko, Viktor, Malanushenko, Elena, Marchante, Moses, Margala, Daniel, Muna, Demitri, Myers, Adam D, Noterdaeme, Pasquier, Oravetz, Daniel, Palanque-Delabrouille, Nathalie, Pâris, Isabelle, Petitjean, Patrick, Pieri, Matthew M, Rossi, Graziano, Schneider, Donald P, Simmons, Audrey, Viel, Matteo, Yeche, Christophe, and York, Donald G
Subjects: Lyman alpha forest, baryon acoustic oscillations, redshift surveys, dark energy experiments, astro-ph.CO, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics
Abstract: We measure the large-scale cross-correlation of quasars with the Lyα forest absorption, using over 164,000 quasars from Data Release 11 of the SDSS-III Baryon Oscillation Spectroscopic Survey. We extend the previous study of roughly 60,000 quasars from Data Release 9 to larger separations, allowing a measurement of the Baryonic Acoustic Oscillation (BAO) scale along the line of sight c/(H(z = 2.36)rs) = 9.0±0.3 and across the line of sight DA (z = 2.36)/rs = 10.8±0.4, consistent with CMB and other BAO data. Using the best fit value of the sound horizon from Planck data (rs = 147.49 Mpc), we can translate these results to a measurement of the Hubble parameter of H(z = 2.36) = 226±8 km s -1 Mpc-1 and of the angular diameter distance of D A (z = 2.36) = 1590±60 Mpc. The measured cross-correlation function and an update of the code to fit the BAO scale (baofit) are made publicly available.©2014 IOP Publishing Ltd and Sissa Medialab srl.
Published: 2014

48. THE TENTH DATA RELEASE OF THE SLOAN DIGITAL SKY SURVEY: FIRST SPECTROSCOPIC DATA FROM THE SDSS-III APACHE POINT OBSERVATORY GALACTIC EVOLUTION EXPERIMENT

Author: Ahn, Christopher P, Alexandroff, Rachael, Prieto, Carlos Allende, Anders, Friedrich, Anderson, Scott F, Anderton, Timothy, Andrews, Brett H, Aubourg, Éric, Bailey, Stephen, Bastien, Fabienne A, Bautista, Julian E, Beers, Timothy C, Beifiori, Alessandra, Bender, Chad F, Berlind, Andreas A, Beutler, Florian, Bhardwaj, Vaishali, Bird, Jonathan C, Bizyaev, Dmitry, Blake, Cullen H, Blanton, Michael R, Blomqvist, Michael, Bochanski, John J, Bolton, Adam S, Borde, Arnaud, Bovy, Jo, Bradley, Alaina Shelden, Brandt, WN, Brauer, Dorothée, Brinkmann, J, Brownstein, Joel R, Busca, Nicolás G, Carithers, William, Carlberg, Joleen K, Carnero, Aurelio R, Carr, Michael A, Chiappini, Cristina, Chojnowski, S Drew, Chuang, Chia-Hsun, Comparat, Johan, Crepp, Justin R, Cristiani, Stefano, Croft, Rupert AC, Cuesta, Antonio J, Cunha, Katia, da Costa, Luiz N, Dawson, Kyle S, De Lee, Nathan, Dean, Janice DR, Delubac, Timothée, Deshpande, Rohit, Dhital, Saurav, Ealet, Anne, Ebelke, Garrett L, Edmondson, Edward M, Eisenstein, Daniel J, Epstein, Courtney R, Escoffier, Stephanie, Esposito, Massimiliano, Evans, Michael L, Fabbian, D, Fan, Xiaohui, Favole, Ginevra, Castellá, Bruno Femenía, Alvar, Emma Fernández, Feuillet, Diane, Ak, Nurten Filiz, Finley, Hayley, Fleming, Scott W, Font-Ribera, Andreu, Frinchaboy, Peter M, Galbraith-Frew, JG, García-Hernández, DA, Pérez, Ana E García, Ge, Jian, Génova-Santos, R, Gillespie, Bruce A, Girardi, Léo, Hernández, Jonay I González, Gott, J Richard, Gunn, James E, Guo, Hong, Halverson, Samuel, Harding, Paul, Harris, David W, Hasselquist, Sten, Hawley, Suzanne L, Hayden, Michael, Hearty, Frederick R, Davó, Artemio Herrero, Ho, Shirley, Hogg, David W, Holtzman, Jon A, Honscheid, Klaus, Huehnerhoff, Joseph, Ivans, Inese I, Jackson, Kelly M, Jiang, Peng, Johnson, Jennifer A, and Kinemuchi, K
Subjects: atlases, catalogs, surveys, astro-ph.IM, astro-ph.CO, astro-ph.GA, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural), Astronomy & Astrophysics
Abstract: The Sloan Digital Sky Survey (SDSS) has been in operation since 2000 April. This paper presents the Tenth Public Data Release (DR10) from its current incarnation, SDSS-III. This data release includes the first spectroscopic data from the Apache Point Observatory Galaxy Evolution Experiment (APOGEE), along with spectroscopic data from the Baryon Oscillation Spectroscopic Survey (BOSS) taken through 2012 July. The APOGEE instrument is a near-infrared R 22,500 300 fiber spectrograph covering 1.514-1.696 μm. The APOGEE survey is studying the chemical abundances and radial velocities of roughly 100,000 red giant star candidates in the bulge, bar, disk, and halo of the Milky Way. DR10 includes 178,397 spectra of 57,454 stars, each typically observed three or more times, from APOGEE. Derived quantities from these spectra (radial velocities, effective temperatures, surface gravities, and metallicities) are also included. DR10 also roughly doubles the number of BOSS spectra over those included in the Ninth Data Release. DR10 includes a total of 1,507,954 BOSS spectra comprising 927,844 galaxy spectra, 182,009 quasar spectra, and 159,327 stellar spectra selected over 6373.2 deg2. © 2014. The American Astronomical Society. All rights reserved..
Published: 2014

49. The one-dimensional Lyα forest power spectrum from BOSS⋆

Author: Palanque-Delabrouille, Nathalie, Yèche, Christophe, Borde, Arnaud, Le Goff, Jean-Marc, Rossi, Graziano, Viel, Matteo, Aubourg, Éric, Bailey, Stephen, Bautista, Julian, Blomqvist, Michael, Bolton, Adam, Bolton, James S, Busca, Nicolás G, Carithers, Bill, Croft, Rupert AC, Dawson, Kyle S, Delubac, Timothée, Font-Ribera, Andreu, Ho, Shirley, Kirkby, David, Lee, Khee-Gan, Margala, Daniel, Miralda-Escudé, Jordi, Muna, Demitri, Myers, Adam D, Noterdaeme, Pasquier, Pâris, Isabelle, Petitjean, Patrick, Pieri, Matthew M, Rich, James, Rollinde, Emmanuel, Ross, Nicholas P, Schlegel, David J, Schneider, Donald P, Slosar, Anže, and Weinberg, David H
Subjects: cosmology: observations, large-scale structure of Universe, intergalactic medium, cosmological parameters, astro-ph.CO, Astronomical and Space Sciences, Astronomy & Astrophysics
Abstract: We have developed two independent methods for measuring the one-dimensional power spectrum of the transmitted flux in the Lyman-α forest. The first method is based on a Fourier transform and the second on a maximum-likelihood estimator. The two methods are independent and have different systematic uncertainties. Determination of the noise level in the data spectra was subject to a new treatment, because of its significant impact on the derived power spectrum. We applied the two methods to 13 821 quasar spectra from SDSS-III/BOSS DR9 selected from a larger sample of over 60 000 spectra on the basis of their high quality, high signal-to-noise ratio (S/N), and good spectral resolution. The power spectra measured using either approach are in good agreement over all twelve redshift bins from 〈z〉 = 2.2 to 〈z〉 = 4.4, and scales from 0.001 km s-1 to 0.02 km s-1. We determined the methodological andinstrumental systematic uncertainties of our measurements. We provide a preliminary cosmological interpretation of our measurements using available hydrodynamical simulations. The improvement in precision over previously published results from SDSS is a factor 2-3 for constraints on relevant cosmological parameters. For a ΛCDM model and using a constraint on H0 that encompasses measurements based on the local distance ladder and on CMB anisotropies, we infer σ8 = 0.83 ± 0.03 and ns = 0.97 ± 0.02 based on Hi absorption in the range 2.1 < z < 3.7. © ESO, 2013.
Published: 2013

50. Baryon Acoustic Oscillations in the Ly-α forest of BOSS quasars

Author: Busca, Nicolás G, Delubac, Timothée, Rich, James, Bailey, Stephen, Font-Ribera, Andreu, Kirkby, David, Goff, J-M Le, Pieri, Matthew M, Slosar, Anze, Aubourg, Éric, Bautista, Julian E, Bizyaev, Dmitry, Blomqvist, Michael, Bolton, Adam S, Bovy, Jo, Brewington, Howard, Borde, Arnaud, Brinkmann, J, Carithers, Bill, Croft, Rupert AC, Dawson, Kyle S, Ebelke, Garrett, Eisenstein, Daniel J, Hamilton, Jean-Christophe, Ho, Shirley, Hogg, David W, Honscheid, Klaus, Lee, Khee-Gan, Lundgren, Britt, Malanushenko, Elena, Malanushenko, Viktor, Margala, Daniel, Maraston, Claudia, Mehta, Kushal, Miralda-Escudé, Jordi, Myers, Adam D, Nichol, Robert C, Noterdaeme, Pasquier, Olmstead, Matthew D, Oravetz, Daniel, Palanque-Delabrouille, Nathalie, Pan, Kaike, Pâris, Isabelle, Percival, Will J, Petitjean, Patrick, Roe, NA, Rollinde, Emmanuel, Ross, Nicholas P, Rossi, Graziano, Schlegel, David J, Schneider, Donald P, Shelden, Alaina, Sheldon, Erin S, Simmons, Audrey, Snedden, Stephanie, Tinker, Jeremy L, Viel, Matteo, Weaver, Benjamin A, Weinberg, David H, White, Martin, Yèche, Christophe, and York, Donald G
Subjects: astro-ph.CO, Astronomical and Space Sciences, Astronomy & Astrophysics, Astronomical sciences, Particle and high energy physics, Space sciences
Abstract: We report a detection of the baryon acoustic oscillation (BAO) feature in thethree-dimensional correlation function of the transmitted flux fraction in the\Lya forest of high-redshift quasars. The study uses 48,640 quasars in theredshift range $2.1\le z \le 3.5$ from the Baryon Oscillation SpectroscopicSurvey (BOSS) of the third generation of the Sloan Digital Sky Survey(SDSS-III). At a mean redshift $z=2.3$, we measure the monopole and quadrupolecomponents of the correlation function for separations in the range$20\hMpc
Published: 2012

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