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140 results on '"Greene, Thomas P."'

1. Combined analysis of the 12.8 and 15 μm JWST/MIRI eclipse observations of TRAPPIST-1 b

Author

Ducrot, Elsa, Lagage, Pierre-Olivier, Min, Michiel, Gillon, Michaël, Bell, Taylor J., Tremblin, Pascal, Greene, Thomas, Dyrek, Achrène, Bouwman, Jeroen, Waters, Rens, Güdel, Manuel, Henning, Thomas, Vandenbussche, Bart, Absil, Olivier, Barrado, David, Boccaletti, Anthony, Coulais, Alain, Decin, Leen, Edwards, Billy, Gastaud, René, Glasse, Alistair, Kendrew, Sarah, Olofsson, Goran, Patapis, Polychronis, Pye, John, Rouan, Daniel, Whiteford, Niall, Argyriou, Ioannis, Cossou, Christophe, Glauser, Adrian M., Krause, Oliver, Lahuis, Fred, Royer, Pierre, Scheithauer, Silvia, Colina, Luis, van Dishoeck, Ewine F., Ostlin, Göran, Ray, Tom P., and Wright, Gillian

Published
2024
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2. JWST sighting of decametre main-belt asteroids and view on meteorite sources

Author

Burdanov, Artem Y., de Wit, Julien, Brož, Miroslav, Müller, Thomas G., Hoffmann, Tobias, Ferrais, Marin, Micheli, Marco, Jehin, Emmanuel, Parrott, Daniel, Hasler, Samantha N., Binzel, Richard P., Ducrot, Elsa, Kreidberg, Laura, Gillon, Michaël, Greene, Thomas P., Grundy, Will M., Kareta, Theodore, Lagage, Pierre-Olivier, Moskovitz, Nicholas, Thirouin, Audrey, Thomas, Cristina A., and Zieba, Sebastian

Published
2024
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5. A high internal heat flux and large core in a warm Neptune exoplanet

Author

Welbanks, Luis, Bell, Taylor J., Beatty, Thomas G., Line, Michael R., Ohno, Kazumasa, Fortney, Jonathan J., Schlawin, Everett, Greene, Thomas P., Rauscher, Emily, McGill, Peter, Murphy, Matthew, Parmentier, Vivien, Tang, Yao, Edelman, Isaac, Mukherjee, Sagnick, Wiser, Lindsey S., Lagage, Pierre-Olivier, Dyrek, Achrène, and Arnold, Kenneth E.

Published
2024
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6. SO2, silicate clouds, but no CH4 detected in a warm Neptune

Author

Dyrek, Achrène, Min, Michiel, Decin, Leen, Bouwman, Jeroen, Crouzet, Nicolas, Mollière, Paul, Lagage, Pierre-Olivier, Konings, Thomas, Tremblin, Pascal, Güdel, Manuel, Pye, John, Waters, Rens, Henning, Thomas, Vandenbussche, Bart, Ardevol Martinez, Francisco, Argyriou, Ioannis, Ducrot, Elsa, Heinke, Linus, van Looveren, Gwenael, Absil, Olivier, Barrado, David, Baudoz, Pierre, Boccaletti, Anthony, Cossou, Christophe, Coulais, Alain, Edwards, Billy, Gastaud, René, Glasse, Alistair, Glauser, Adrian, Greene, Thomas P., Kendrew, Sarah, Krause, Oliver, Lahuis, Fred, Mueller, Michael, Olofsson, Goran, Patapis, Polychronis, Rouan, Daniel, Royer, Pierre, Scheithauer, Silvia, Waldmann, Ingo, Whiteford, Niall, Colina, Luis, van Dishoeck, Ewine F., Östlin, Göran, Ray, Tom P., and Wright, Gillian

Published
2024
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13. The Transiting Exoplanet Community Early Release Science Program for JWST

Author

Bean, Jacob L., Stevenson, Kevin B., Batalha, Natalie M., Berta-Thompson, Zachory, Kreidberg, Laura, Crouzet, Nicolas, Benneke, Björn, Line, Michael R., Sing, David K., Wakeford, Hannah R., Knutson, Heather A., Kempton, Eliza M.-R., Désert, Jean-Michel, Crossfield, Ian, Batalha, Natasha E., de Wit, Julien, Parmentier, Vivien, Harrington, Joseph, Moses, Julianne I., Lopez-Morales, Mercedes, Alam, Munazza K., Blecic, Jasmina, Bruno, Giovanni, Carter, Aarynn L., Chapman, John W., Decin, Leen, Dragomir, Diana, Evans, Thomas M., Fortney, Jonathan J., Fraine, Jonathan D., Gao, Peter, Muñoz, Antonio García, Gibson, Neale P., Goyal, Jayesh M., Heng, Kevin, Hu, Renyu, Kendrew, Sarah, Kilpatrick, Brian M., Krick, Jessica, Lagage, Pierre-Olivier, Lendl, Monika, Louden, Tom, Madhusudhan, Nikku, Mandell, Avi M., Mansfield, Megan, May, Erin M., Morello, Giuseppe, Morley, Caroline V., Nikolov, Nikolay, Redfield, Seth, Roberts, Jessica E., Schlawin, Everett, Spake, Jessica J., Todorov, Kamen O., Tsiaras, Angelos, Venot, Olivia, Waalkes, William C., Wheatley, Peter J., Zellem, Robert T., Angerhausen, Daniel, Barrado, David, Carone, Ludmila, Casewell, Sarah L., Cubillos, Patricio E., Damiano, Mario, de Val-Borro, Miguel, Drummond, Benjamin, Edwards, Billy, Endl, Michael, Espinoza, Nestor, France, Kevin, Gizis, John E., Greene, Thomas P., Henning, Thomas K., Hong, Yucian, Ingalls, James G., Iro, Nicolas, Irwin, Patrick G. J., Kataria, Tiffany, Lahuis, Fred, Leconte, Jérémy, Lillo-Box, Jorge, Lines, Stefan, Lothringer, Joshua D., Mancini, Luigi, Marchis, Franck, Mayne, Nathan, Palle, Enric, Rauscher, Emily, Roudier, Gaël, Shkolnik, Evgenya L., Southworth, John, Swain, Mark R., Taylor, Jake, Teske, Johanna, Tinetti, Giovanna, Tremblin, Pascal, Tucker, Gregory S., van Boekel, Roy, Waldmann, Ingo P., Weaver, Ian C., and Zingales, Tiziano

Published
2018

14. Superior field performance of waxy corn engineered using CRISPR–Cas9

Author

Gao, Huirong, Gadlage, Mark J., Lafitte, H. Renee, Lenderts, Brian, Yang, Meizhu, Schroder, Megan, Farrell, Jeffry, Snopek, Kay, Peterson, Dave, Feigenbutz, Lanie, Jones, Spencer, St Clair, Grace, Rahe, Melissa, Sanyour-Doyel, Nathalie, Peng, Chenna, Wang, Lijuan, Young, Joshua K., Beatty, Mary, Dahlke, Brian, Hazebroek, Jan, Greene, Thomas W., Cigan, A. Mark, Chilcoat, N. Doane, and Meeley, R. Bob

Published
2020
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15. Transiting Exoplanet Studies and Community Targets for JWST ʼs Early Release Science Program

Author

Stevenson, Kevin B., Lewis, Nikole K., Bean, Jacob L., Beichman, Charles, Fraine, Jonathan, Kilpatrick, Brian M., Krick, J. E., Lothringer, Joshua D., Mandell, Avi M., Valenti, Jeff A., Agol, Eric, Angerhausen, Daniel, Barstow, Joanna K., Birkmann, Stephan M., Burrows, Adam, Charbonneau, David, Cowan, Nicolas B., Crouzet, Nicolas, Cubillos, Patricio E., Curry, S. M., Dalba, Paul A., de Wit, Julien, Deming, Drake, Désert, Jean-Michel, Doyon, René, Dragomir, Diana, Ehrenreich, David, Fortney, Jonathan J., Muñoz, Antonio García, Gibson, Neale P., Gizis, John E., Greene, Thomas P., Harrington, Joseph, Heng, Kevin, Kataria, Tiffany, Kempton, Eliza M.-R., Knutson, Heather, Kreidberg, Laura, Lafrenière, David, Lagage, Pierre-Olivier, Line, Michael R., Lopez-Morales, Mercedes, Madhusudhan, Nikku, Morley, Caroline V., Rocchetto, Marco, Schlawin, Everett, Shkolnik, Evgenya L., Shporer, Avi, Sing, David K., Todorov, Kamen O., Tucker, Gregory S., and Wakeford, Hannah R.

Published
2016

16. The dynamic universe: realizing the potential of classical time domain and multimessenger astrophysics.

Author

Howell, Steve B., Howell, D. Andrew, Street, R. A., Soares-Furtado, Melinda, Jackson, Brian, Greene, Thomas P., Racusin, Judith, and Perlman, Eric

Subjects
ASTROPHYSICS, PLANETARY science, SOLAR system, UNIVERSE, SPACE telescopes, CITIZEN science
Abstract

In parallel with the multi-messenger revolution, major advances in time-domain astronomy across multiple science disciplines relevant to astrophysics are becoming more urgent to address. Aside from electromagnetic observations of gravitational wave events and explosive counterparts, there are a number of "classical" astrophysical areas that require new thinking for proper exploration in the time domain. How NASA, NSF, ESA, and ESO consider the 2020 USA Decadal Survey within the astronomy community, as well as the worldwide call to support and expand time domain and multi-messenger astrophysics, it is crucial that all areas of astrophysics, including stellar, galactic, Solar System, and exoplanetary science participate in the discussion, and that it not be made into an exclusive preserve of cosmological, high-energy, explosive and transient science. Time domain astronomy is used to explore many aspects of astrophysics-particularly concerning ground- and space-based mission science goals of exploring how the Universe works, understanding how did we get here, and are we alone. Time domain studies are already built into the core operations of many currently operating and future space telescopes (e.g., Roman, PLATO) as well as current and planned large areal ground-based surveys (e.g., Rubin). Time-domain observations designed for one scientific purpose, also lead to great discoveries in many other science areas. The recent advent of user-friendly hardware, software, observational approaches, and online data infrastructure has also helped make time domain observations especially suitable and appealing for citizen science projects. We provide a review of the current state of TDAMM alerts and observational protocols, revealing a wide array of software and applications, much of which is incompatible. Any conversation regarding TDAMM astrophysics should include all aspects of the field, including those aspects seen as classical applications. [ABSTRACT FROM AUTHOR]

Published
2024
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17. The James Webb Space Telescope Mission

Author

Gardner, Jonathan P., Mather, John C., Abbott, Randy, Abell, James S., Abernathy, Mark, Abney, Faith E., Abraham, John G., Abraham, Roberto, Abul-Huda, Yasin M., Acton, Scott, Adams, Cynthia K., Adams, Evan, Adler, David S., Adriaensen, Maarten, Aguilar, Jonathan Albert, Ahmed, Mansoor, Ahmed, Nasif S., Ahmed, Tanjira, Albat, Rüdeger, Albert, Loïc, Alberts, Stacey, Aldridge, David, Allen, Mary Marsha, Allen, Shaune S., Altenburg, Martin, Altunc, Serhat, Alvarez, Jose Lorenzo, Álvarez-Márquez, Javier, de Oliveira, Catarina Alves, Ambrose, Leslie L., Anandakrishnan, Satya M., Andersen, Gregory C., Anderson, Harry James, Anderson, Jay, Anderson, Kristen, Anderson, Sara M., Aprea, Julio, Archer, Benita J., Arenberg, Jonathan W., Argyriou, Ioannis, Arribas, Santiago, Artigau, Étienne, Arvai, Amanda Rose, Atcheson, Paul, Atkinson, Charles B., Averbukh, Jesse, Aymergen, Cagatay, Bacinski, John J., Baggett, Wayne E., Bagnasco, Giorgio, Baker, Lynn L., Balzano, Vicki Ann, Banks, Kimberly A., Baran, David A., Barker, Elizabeth A., Barrett, Larry K., Barringer, Bruce O., Barto, Allison, Bast, William, Baudoz, Pierre, Baum, Stefi, Beatty, Thomas G., Beaulieu, Mathilde, Bechtold, Kathryn, Beck, Tracy, Beddard, Megan M., Beichman, Charles, Bellagama, Larry, Bely, Pierre, Berger, Timothy W., Bergeron, Louis E., Darveau-Bernier, Antoine, Bertch, Maria D., Beskow, Charlotte, Betz, Laura E., Biagetti, Carl P., Birkmann, Stephan, Bjorklund, Kurt F., Blackwood, James D., Blazek, Ronald Paul, Blossfeld, Stephen, Bluth, Marcel, Boccaletti, Anthony, Boegner Jr., Martin E., Bohlin, Ralph C., Boia, John Joseph, Böker, Torsten, Bonaventura, N., Bond, Nicholas A., Bosley, Kari Ann, Boucarut, Rene A., Bouchet, Patrice, Bouwman, Jeroen, Bower, Gary, Bowers, Ariel S., Bowers, Charles W., Boyce, Leslye A., Boyer, Christine T., Boyer, Martha L., Boyer, Michael, Boyer, Robert, Bradley, Larry D., Brady, Gregory R., Brandl, Bernhard R., Brannen, Judith L., Breda, David, Bremmer, Harold G., Brennan, David, Bresnahan, Pamela A., Bright, Stacey N., Broiles, Brian J., Bromenschenkel, Asa, Brooks, Brian H., Brooks, Keira J., Brown, Bob, Brown, Bruce, Brown, Thomas M., Bruce, Barry W., Bryson, Jonathan G., Bujanda, Edwin D., Bullock, Blake M., Bunker, A. J., Bureo, Rafael, Burt, Irving J., Bush, James Aaron, Bushouse, Howard A., Bussman, Marie C., Cabaud, Olivier, Cale, Steven, Calhoon, Charles D., Calvani, Humberto, Canipe, Alicia M., Caputo, Francis M., Cara, Mihai, Carey, Larkin, Case, Michael Eli, Cesari, Thaddeus, Cetorelli, Lee D., Chance, Don R., Chandler, Lynn, Chaney, Dave, Chapman, George N., Charlot, S., Chayer, Pierre, Cheezum, Jeffrey I., Chen, Bin, Chen, Christine H., Cherinka, Brian, Chichester, Sarah C., Chilton, Zachary S., Chittiraibalan, Dharini, Clampin, Mark, Clark, Charles R., Clark, Kerry W., Clark, Stephanie M., Claybrooks, Edward E., Cleveland, Keith A., Cohen, Andrew L., Cohen, Lester M., Colón, Knicole D., Coleman, Benee L., Colina, Luis, Comber, Brian J., Comeau, Thomas M., Comer, Thomas, Reis, Alain Conde, Connolly, Dennis C., Conroy, Kyle E., Contos, Adam R., Contreras, James, Cook, Neil J., Cooper, James L., Cooper, Rachel Aviva, Correia, Michael F., Correnti, Matteo, Cossou, Christophe, Costanza, Brian F., Coulais, Alain, Cox, Colin R., Coyle, Ray T., Cracraft, Misty M., Noriega-Crespo, Alberto, Crew, Keith A., Curtis, Gary J., Cusveller, Bianca, Maciel, Cleyciane Da Costa, Dailey, Christopher T., Daugeron, Frédéric, Davidson, Greg S., Davies, James E., Davis, Katherine Anne, Davis, Michael S., Day, Ratna, de Chambure, Daniel, de Jong, Pauline, De Marchi, Guido, Dean, Bruce H., Decker, John E., Delisa, Amy S., Dell, Lawrence C., Dellagatta, Gail, Dembinska, Franciszka, Demosthenes, Sandor, Dencheva, Nadezhda M., Deneu, Philippe, DePriest, William W., Deschenes, Jeremy, Dethienne, Nathalie, Detre, Örs Hunor, Diaz, Rosa Izela, Dicken, Daniel, DiFelice, Audrey S., Dillman, Matthew, Disharoon, Maureen O., van Dishoeck, Ewine F., Dixon, William V., Doggett, Jesse B., Dominguez, Keisha L., Donaldson, Thomas S., Doria-Warner, Cristina M., Santos, Tony Dos, Doty, Heather, Douglas Jr., Robert E., Doyon, René, Dressler, Alan, Driggers, Jennifer, Driggers, Phillip A., Dunn, Jamie L., DuPrie, Kimberly C., Dupuis, Jean, Durning, John, Dutta, Sanghamitra B., Earl, Nicholas M., Eccleston, Paul, Ecobichon, Pascal, Egami, Eiichi, Ehrenwinkler, Ralf, Eisenhamer, Jonathan D., Eisenhower, Michael, Eisenstein, Daniel J., Hamel, Zaky El, Elie, Michelle L., Elliott, James, Elliott, Kyle Wesley, Engesser, Michael, Espinoza, Néstor, Etienne, Odessa, Etxaluze, Mireya, Evans, Leah, Fabreguettes, Luce, Falcolini, Massimo, Falini, Patrick R., Fatig, Curtis, Feeney, Matthew, Feinberg, Lee D., Fels, Raymond, Ferdous, Nazma, Ferguson, Henry C., Ferrarese, Laura, Ferreira, Marie-Héléne, Ferruit, Pierre, Ferry, Malcolm, Filippazzo, Joseph Charles, Firre, Daniel, Fix, Mees, Flagey, Nicolas, Flanagan, Kathryn A., Fleming, Scott W., Florian, Michael, Flynn, James R., Foiadelli, Luca, Fontaine, Mark R., Fontanella, Erin Marie, Forshay, Peter Randolph, Fortner, Elizabeth A., Fox, Ori D., Framarini, Alexandro P., Francisco, John I., Franck, Randy, Franx, Marijn, Franz, David E., Friedman, Scott D., Friend, Katheryn E., Frost, James R., Fu, Henry, Fullerton, Alexander W., Gaillard, Lionel, Galkin, Sergey, Gallagher, Ben, Galyer, Anthony D., Marín, Macarena García, Gardner, Lisa E., Garland, Dennis, Garrett, Bruce Albert, Gasman, Danny, Gáspár, András, Gastaud, René, Gaudreau, Daniel, Gauthier, Peter Timothy, Geers, Vincent, Geithner, Paul H., Gennaro, Mario, Gerber, John, Gereau, John C., Giampaoli, Robert, Giardino, Giovanna, Gibbons, Paul C., Gilbert, Karolina, Gilman, Larry, Girard, Julien H., Giuliano, Mark E., Gkountis, Konstantinos, Glasse, Alistair, Glassmire, Kirk Zachary, Glauser, Adrian Michael, Glazer, Stuart D., Goldberg, Joshua, Golimowski, David A., Gonzaga, Shireen P., Gordon, Karl D., Gordon, Shawn J., Goudfrooij, Paul, Gough, Michael J., Graham, Adrian J., Grau, Christopher M., Green, Joel David, Greene, Gretchen R., Greene, Thomas P., Greenfield, Perry E., Greenhouse, Matthew A., Greve, Thomas R., Greville, Edgar M., Grimaldi, Stefano, Groe, Frank E., Groebner, Andrew, Grumm, David M., Grundy, Timothy, Güdel, Manuel, Guillard, Pierre, Guldalian, John, Gunn, Christopher A., Gurule, Anthony, Gutman, Irvin Meyer, Guy, Paul D., Guyot, Benjamin, Hack, Warren J., Haderlein, Peter, Hagan, James B., Hagedorn, Andria, Hainline, Kevin, Haley, Craig, Hami, Maryam, Hamilton, Forrest Clifford, Hammann, Jeffrey, Hammel, Heidi B., Hanley, Christopher J., Hansen, Carl August, Hardy, Bruce, Harnisch, Bernd, Harr, Michael Hunter, Harris, Pamela, Hart, Jessica Ann, Hartig, George F., Hasan, Hashima, Hashim, Kathleen Marie, Hashimoto, Ryan, Haskins, Sujee J., Hawkins, Robert Edward, Hayden, Brian, Hayden, William L., Healy, Mike, Hecht, Karen, Heeg, Vince J., Hejal, Reem, Helm, Kristopher A., Hengemihle, Nicholas J., Henning, Thomas, Henry, Alaina, Henry, Ronald L., Henshaw, Katherine, Hernandez, Scarlin, Herrington, Donald C., Heske, Astrid, Hesman, Brigette Emily, Hickey, David L., Hilbert, Bryan N., Hines, Dean C., Hinz, Michael R., Hirsch, Michael, Hitcho, Robert S., Hodapp, Klaus, Hodge, Philip E., Hoffman, Melissa, Holfeltz, Sherie T., Holler, Bryan Jason, Hoppa, Jennifer Rose, Horner, Scott, Howard, Joseph M., Howard, Richard J., Huber, Jean M., Hunkeler, Joseph S., Hunter, Alexander, Hunter, David Gavin, Hurd, Spencer W., Hurst, Brendan J., Hutchings, John B., Hylan, Jason E., Ignat, Luminita Ilinca, Illingworth, Garth, Irish, Sandra M., Isaacs III, John C., Jackson Jr., Wallace C., Jaffe, Daniel T., Jahic, Jasmin, Jahromi, Amir, Jakobsen, Peter, James, Bryan, James, John C., James, LeAndrea Rae, Jamieson, William Brian, Jandra, Raymond D., Jayawardhana, Ray, Jedrzejewski, Robert, Jeffers, Basil S., Jensen, Peter, Joanne, Egges, Johns, Alan T., Johnson, Carl A., Johnson, Eric L., Johnson, Patricia, Johnson, Phillip Stephen, Johnson, Thomas K., Johnson, Timothy W., Johnstone, Doug, Jollet, Delphine, Jones, Danny P., Jones, Gregory S., Jones, Olivia C., Jones, Ronald A., Jones, Vicki, Jordan, Ian J., Jordan, Margaret E., Jue, Reginald, Jurkowski, Mark H., Justis, Grant, Justtanont, Kay, Kaleida, Catherine C., Kalirai, Jason S., Kalmanson, Phillip Cabrales, Kaltenegger, Lisa, Kammerer, Jens, Kan, Samuel K., Kanarek, Graham Childs, Kao, Shaw-Hong, Karakla, Diane M., Karl, Hermann, Kassin, Susan A., Kauffman, David D., Kavanagh, Patrick, Kelley, Leigh L., Kelly, Douglas M., Kendrew, Sarah, Kennedy, Herbert V., Kenny, Deborah A., Keski-Kuha, Ritva A., Keyes, Charles D., Khan, Ali, Kidwell, Richard C., Kimble, Randy A., King, James S., King, Richard C., Kinzel, Wayne M., Kirk, Jeffrey R., Kirkpatrick, Marc E., Klaassen, Pamela, Klingemann, Lana, Klintworth, Paul U., Knapp, Bryan Adam, Knight, Scott, Knollenberg, Perry J., Knutsen, Daniel Mark, Koehler, Robert, Koekemoer, Anton M., Kofler, Earl T., Kontson, Vicki L., Kovacs, Aiden Rose, Kozhurina-Platais, Vera, Krause, Oliver, Kriss, Gerard A., Krist, John, Kristoffersen, Monica R., Krogel, Claudia, Krueger, Anthony P., Kulp, Bernard A., Kumari, Nimisha, Kwan, Sandy W., Kyprianou, Mark, Labador, Aurora Gadiano, Labiano, Álvaro, Lafrenière, David, Lagage, Pierre-Olivier, Laidler, Victoria G., Laine, Benoit, Laird, Simon, Lajoie, Charles-Philippe, Lallo, Matthew D., Lam, May Yen, LaMassa, Stephanie Marie, Lambros, Scott D., Lampenfield, Richard Joseph, Lander, Matthew Ed, Langston, James Hutton, Larson, Kirsten, Larson, Melora, LaVerghetta, Robert Joseph, Law, David R., Lawrence, Jon F., Lee, David W., Lee, Janice, Lee, Yat-Ning Paul, Leisenring, Jarron, Leveille, Michael Dunlap, Levenson, Nancy A., Levi, Joshua S., Levine, Marie B., Lewis, Dan, Lewis, Jake, Lewis, Nikole, Libralato, Mattia, Lidon, Norbert, Liebrecht, Paula Louisa, Lightsey, Paul, Lilly, Simon, Lim, Frederick C., Lim, Pey Lian, Ling, Sai-Kwong, Link, Lisa J., Link, Miranda Nicole, Lipinski, Jamie L., Liu, XiaoLi, Lo, Amy S., Lobmeyer, Lynette, Logue, Ryan M., Long, Chris A., Long, Douglas R., Long, Ilana D., Long, Knox S., López-Caniego, Marcos, Lotz, Jennifer M., Love-Pruitt, Jennifer M., Lubskiy, Michael, Luers, Edward B., Luetgens, Robert A., Luevano, Annetta J., Lui, Sarah Marie G. Flores, Lund III, James M., Lundquist, Ray A., Lunine, Jonathan, Lützgendorf, Nora, Lynch, Richard J., MacDonald, Alex J., MacDonald, Kenneth, Macias, Matthew J., Macklis, Keith I., Maghami, Peiman, Maharaja, Rishabh Y., Maiolino, Roberto, Makrygiannis, Konstantinos G., Malla, Sunita Giri, Malumuth, Eliot M., Manjavacas, Elena, Marini, Andrea, Marrione, Amanda, Marston, Anthony, Martel, André R, Martin, Didier, Martin, Peter G., Martinez, Kristin L., Maschmann, Marc, Masci, Gregory L., Masetti, Margaret E., Maszkiewicz, Michael, Matthews, Gary, Matuskey, Jacob E., McBrayer, Glen A., McCarthy, Donald W., McCaughrean, Mark J., McClare, Leslie A., McClare, Michael D., McCloskey, John C., McClurg, Taylore D., McCoy, Martin, McElwain, Michael W., McGregor, Roy D., McGuffey, Douglas B., McKay, Andrew G., McKenzie, William K., McLean, Brian, McMaster, Matthew, McNeil, Warren, De Meester, Wim, Mehalick, Kimberly L., Meixner, Margaret, Meléndez, Marcio, Menzel, Michael P., Menzel, Michael T., Merz, Matthew, Mesterharm, David D., Meyer, Michael R., Meyett, Michele L., Meza, Luis E., Midwinter, Calvin, Milam, Stefanie N., Miller, Jay Todd, Miller, William C., Miskey, Cherie L., Misselt, Karl, Mitchell, Eileen P., Mohan, Martin, Montoya, Emily E., Moran, Michael J., Morishita, Takahiro, Moro-Martín, Amaya, Morrison, Debra L., Morrison, Jane, Morse, Ernie C., Moschos, Michael, Moseley, S. H., Mosier, Gary E., Mosner, Peter, Mountain, Matt, Muckenthaler, Jason S., Mueller, Donald G., Mueller, Migo, Muhiem, Daniella, Mühlmann, Prisca, Mullally, Susan Elizabeth, Mullen, Stephanie M., Munger, Alan J, Murphy, Jess, Murray, Katherine T., Muzerolle, James C., Mycroft, Matthew, Myers, Andrew, Myers, Carey R., Myers, Fred Richard R., Myers, Richard, Myrick, Kaila, Nagle IV, Adrian F., Nayak, Omnarayani, Naylor, Bret, Neff, Susan G., Nelan, Edmund P., Nella, John, Nguyen, Duy Tuong, Nguyen, Michael N., Nickson, Bryony, Nidhiry, John Joseph, Niedner, Malcolm B., Nieto-Santisteban, Maria, Nikolov, Nikolay K., Nishisaka, Mary Ann, Nota, Antonella, O'Mara, Robyn C., Oboryshko, Michael, O'Brien, Marcus B., Ochs, William R., Offenberg, Joel D., Ogle, Patrick Michael, Ohl, Raymond G., Olmsted, Joseph Hamden, Osborne, Shannon Barbara, O'Shaughnessy, Brian Patrick, Östlin, Göran, O'Sullivan, Brian, Otor, O. Justin, Ottens, Richard, Ouellette, Nathalie N. -Q., Outlaw, Daria J., Owens, Beverly A., Pacifici, Camilla, Page, James Christophe, Paranilam, James G., Park, Sang, Parrish, Keith A., Paschal, Laura, Patapis, Polychronis, Patel, Jignasha, Patrick, Keith, Pattishall Jr., Robert A., Paul, Douglas William, Paul, Shirley J., Pauly, Tyler Andrew, Pavlovsky, Cheryl M., Peña-Guerrero, Maria, Pedder, Andrew H., Peek, Matthew Weldon, Pelham, Patricia A., Penanen, Konstantin, Perriello, Beth A., Perrin, Marshall D., Perrine, Richard F., Perrygo, Chuck, Peslier, Muriel, Petach, Michael, Peterson, Karla A., Pfarr, Tom, Pierson, James M., Pietraszkiewicz, Martin, Pilchen, Guy, Pipher, Judy L., Pirzkal, Norbert, Pitman, Joseph T., Player, Danielle M., Plesha, Rachel, Plitzke, Anja, Pohner, John A., Poletis, Karyn Konstantin, Pollizzi, Joseph A., Polster, Ethan, Pontius, James T., Pontoppidan, Klaus, Porges, Susana C., Potter, Gregg D., Prescott, Stephen, Proffitt, Charles R., Pueyo, Laurent, Neira, Irma Aracely Quispe, Radich, Armando, Rager, Reiko T., Rameau, Julien, Ramey, Deborah D., Alarcon, Rafael Ramos, Rampini, Riccardo, Rapp, Robert, Rashford, Robert A., Rauscher, Bernard J., Ravindranath, Swara, Rawle, Timothy, Rawlings, Tynika N., Ray, Tom, Regan, Michael W., Rehm, Brian, Rehm, Kenneth D., Reid, Neill, Reis, Carl A., Renk, Florian, Reoch, Tom B., Ressler, Michael, Rest, Armin W., Reynolds, Paul J., Richon, Joel G., Richon, Karen V., Ridgaway, Michael, Riedel, Adric Richard, Rieke, George H., Rieke, Marcia, Rifelli, Richard E., Rigby, Jane R., Riggs, Catherine S., Ringel, Nancy J., Ritchie, Christine E., Rix, Hans-Walter, Robberto, Massimo, Robinson, Michael S., Robinson, Orion, Rock, Frank W., Rodriguez, David R., del Pino, Bruno Rodríguez, Roellig, Thomas, Rohrbach, Scott O., Roman, Anthony J., Romelfanger, Frederick J., Romo Jr., Felipe P., Rosales, Jose J., Rose, Perry, Roteliuk, Anthony F., Roth, Marc N., Rothwell, Braden Quinn, Rouzaud, Sylvain, Rowe, Jason, Rowlands, Neil, Roy, Arpita, Royer, Pierre, Rui, Chunlei, Rumler, Peter, Rumpl, William, Russ, Melissa L., Ryan, Michael B., Ryan, Richard M., Saad, Karl, Sabata, Modhumita, Sabatino, Rick, Sabbi, Elena, Sabelhaus, Phillip A., Sabia, Stephen, Sahu, Kailash C., Saif, Babak N., Salvignol, Jean-Christophe, Samara-Ratna, Piyal, Samuelson, Bridget S., Sanders, Felicia A., Sappington, Bradley, Sargent, B. A., Sauer, Arne, Savadkin, Bruce J., Sawicki, Marcin, Schappell, Tina M., Scheffer, Caroline, Scheithauer, Silvia, Scherer, Ron, Schiff, Conrad, Schlawin, Everett, Schmeitzky, Olivier, Schmitz, Tyler S., Schmude, Donald J., Schneider, Analyn, Schreiber, Jürgen, Schroeven-Deceuninck, Hilde, Schultz, John J., Schwab, Ryan, Schwartz, Curtis H., Scoccimarro, Dario, Scott, John F., Scott, Michelle B., Seaton, Bonita L., Seely, Bruce S., Seery, Bernard, Seidleck, Mark, Sembach, Kenneth, Shanahan, Clare Elizabeth, Shaughnessy, Bryan, Shaw, Richard A., Shay, Christopher Michael, Sheehan, Even, Sheth, Kartik, Shih, Hsin-Yi, Shivaei, Irene, Siegel, Noah, Sienkiewicz, Matthew G., Simmons, Debra D., Simon, Bernard P., Sirianni, Marco, Sivaramakrishnan, Anand, Slade, Jeffrey E., Sloan, G. C., Slocum, Christine E., Slowinski, Steven E., Smith, Corbett T., Smith, Eric P., Smith, Erin C., Smith, Koby, Smith, Robert, Smith, Stephanie J., Smolik, John L., Soderblom, David R., Sohn, Sangmo Tony, Sokol, Jeff, Sonneborn, George, Sontag, Christopher D., Sooy, Peter R., Soummer, Remi, Southwood, Dana M., Spain, Kay, Sparmo, Joseph, Speer, David T., Spencer, Richard, Sprofera, Joseph D., Stallcup, Scott S., Stanley, Marcia K., Stansberry, John A., Stark, Christopher C., Starr, Carl W., Stassi, Diane Y., Steck, Jane A., Steeley, Christine D., Stephens, Matthew A., Stephenson, Ralph J., Stewart, Alphonso C., Stiavelli, Massimo, Stockman Jr., Hervey, Strada, Paolo, Straughn, Amber N., Streetman, Scott, Strickland, David Kendal, Strobele, Jingping F., Stuhlinger, Martin, Stys, Jeffrey Edward, Such, Miguel, Sukhatme, Kalyani, Sullivan, Joseph F., Sullivan, Pamela C., Sumner, Sandra M., Sun, Fengwu, Sunnquist, Benjamin Dale, Swade, Daryl Allen, Swam, Michael S., Swenton, Diane F., Swoish, Robby A., Litten, Oi In Tam, Tamas, Laszlo, Tao, Andrew, Taylor, David K., Taylor, Joanna M., Plate, Maurice te, Van Tea, Mason, Teague, Kelly K., Telfer, Randal C., Temim, Tea, Texter, Scott C., Thatte, Deepashri G., Thompson, Christopher Lee, Thompson, Linda M., Thomson, Shaun R., Thronson, Harley, Tierney, C. M., Tikkanen, Tuomo, Tinnin, Lee, Tippet, William Thomas, Todd, Connor William, Tran, Hien D., Trauger, John, Trejo, Edwin Gregorio, Truong, Justin Hoang Vinh, Tsukamoto, Christine L., Tufail, Yasir, Tumlinson, Jason, Tustain, Samuel, Tyra, Harrison, Ubeda, Leonardo, Underwood, Kelli, Uzzo, Michael A., Vaclavik, Steven, Valenduc, Frida, Valenti, Jeff A., Van Campen, Julie, van de Wetering, Inge, Van Der Marel, Roeland P., van Haarlem, Remy, Vandenbussche, Bart, Vanterpool, Dona D., Vernoy, Michael R., Costas, Maria Begoña Vila, Volk, Kevin, Voorzaat, Piet, Voyton, Mark F., Vydra, Ekaterina, Waddy, Darryl J., Waelkens, Christoffel, Wahlgren, Glenn Michael, Walker Jr., Frederick E., Wander, Michel, Warfield, Christine K., Warner, Gerald, Wasiak, Francis C., Wasiak, Matthew F., Wehner, James, Weiler, Kevin R., Weilert, Mark, Weiss, Stanley B., Wells, Martyn, Welty, Alan D., Wheate, Lauren, Wheeler, Thomas P., White, Christy L., Whitehouse, Paul, Whiteleather, Jennifer Margaret, Whitman, William Russell, Williams, Christina C., Willmer, Christopher N. A., Willott, Chris J., Willoughby, Scott P., Wilson, Andrew, Wilson, Debra, Wilson, Donna V., Windhorst, Rogier, Wislowski, Emily Christine, Wolfe, David J., Wolfe, Michael A., Wolff, Schuyler, Wondel, Amancio, Woo, Cindy, Woods, Robert T., Worden, Elaine, Workman, William, Wright, Gillian S., Wu, Carl, Wu, Chi-Rai, Wun, Dakin D., Wymer, Kristen B., Yadetie, Thomas, Yan, Isabelle C., Yang, Keith C., Yates, Kayla L., Yeager, Christopher R., Yerger, Ethan John, Young, Erick T., Young, Gary, Yu, Gene, Yu, Susan, Zak, Dean S., Zeidler, Peter, Zepp, Robert, Zhou, Julia, Zincke, Christian A., Zonak, Stephanie, and Zondag, Elisabeth

Subjects
FOS: Physical sciences, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM)
Abstract

Twenty-six years ago a small committee report, building on earlier studies, expounded a compelling and poetic vision for the future of astronomy, calling for an infrared-optimized space telescope with an aperture of at least $4m$. With the support of their governments in the US, Europe, and Canada, 20,000 people realized that vision as the $6.5m$ James Webb Space Telescope. A generation of astronomers will celebrate their accomplishments for the life of the mission, potentially as long as 20 years, and beyond. This report and the scientific discoveries that follow are extended thank-you notes to the 20,000 team members. The telescope is working perfectly, with much better image quality than expected. In this and accompanying papers, we give a brief history, describe the observatory, outline its objectives and current observing program, and discuss the inventions and people who made it possible. We cite detailed reports on the design and the measured performance on orbit., Comment: Accepted by PASP for the special issue on The James Webb Space Telescope Overview, 29 pages, 4 figures

Published
2023
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18. First Sample of H$\alpha$+[O III] $\lambda$5007 Line Emitters at $z > 6$ Through JWST/NIRCam Slitless Spectroscopy: Physical Properties and Line Luminosity Functions

Author

Sun, Fengwu, Egami, Eiichi, Pirzkal, Nor, Rieke, Marcia, Baum, Stefi, Boyer, Martha, Boyett, Kristan, Bunker, Andrew J., Cameron, Alex J., Curti, Mirko, Eisenstein, Daniel J., Gennaro, Mario, Greene, Thomas P., Jaffe, Daniel, Kelly, Doug, Koekemoer, Anton M., Kumari, Nimisha, Maiolino, Roberto, Maseda, Michael, Perna, Michele, Rest, Armin, Robertson, Brant E., Schlawin, Everett, Smit, Renske, Stansberry, John, Sunnquist, Ben, Tacchella, Sandro, Williams, Christina C., and Willmer, Christopher N. A.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

We present a sample of four emission-line galaxies at $z=6.11-6.35$ that were serendipitously discovered using the commissioning data for the JWST/NIRCam wide-field slitless spectroscopy (WFSS) mode. One of them (at $z=6.11$) has been reported previously while the others are new discoveries. These sources are selected by the secure detections of both [O III] $\lambda$5007 and H$\alpha$ lines with other fainter lines tentatively detected in some cases (e.g., [O II] $\lambda$3727, [O III] $\lambda$4959). In the [O III]/H$\beta$ - [N II]/H$\alpha$ Baldwin-Phillips-Terlevich diagram, these galaxies occupy the same parameter space as that of $z\sim2$ star-forming galaxies, indicating that they have been enriched rapidly to sub-solar metallicities ($\sim$0.4 $Z_{\odot}$), similar to galaxies with comparable stellar masses at much lower redshifts. The detection of strong H$\alpha$ lines suggests a higher ionizing photon production efficiency within galaxies in the early Universe. We find brightening of the [O III] $\lambda$5007 line luminosity function (LF) from $z=3$ to 6, and weak or no redshift evolution of the H$\alpha$ line LF from $z=2$ to 6. Both LFs are under-predicted at $z\sim6$ by a factor of $\sim$10 in certain cosmological simulations. This further indicates a global Ly$\alpha$ photon escape fraction of 7-10% at $z\sim6$, slightly lower than previous estimates through the comparison of the UV-derived star-formation rate density and Ly$\alpha$ luminosity density. Our sample recovers $66^{+128}_{-44}$% of $z=6.0-6.6$ galaxies in the survey volume with stellar masses greater than $5\times10^8$ $M_{\odot}$, suggesting the ubiquity of strong H$\alpha$ and [O III] line emitters in the Epoch of Reionization, which will be further uncovered in the era of JWST., Comment: 26 pages, 11 figures, accepted for publication in ApJ on May 11, 2023

Published
2022

19. The Effort-Outcome Gap: Differences for African American and Hispanic Community College Students in Student Engagement and Academic Achievement

Author

Greene, Thomas G., Marti, C. Nathan, and McClenney, Kay

Abstract

Little in higher education seems more intractable than the access and achievement gaps between ethnic groups. White students consistently outdistance African Americans and Hispanics in both enrollment and academic performance. Despite the negative relationships between minority status and academic performance, African American and Hispanic students report being more engaged in college than their White peers. The purpose of this study is to understand the relationships between minority status and student engagement and minority status and academic outcomes in two-year colleges. Specifically, this study seeks to determine whether students from various racial and ethnic groups attending two-year colleges differ in the amount of time and energy they invest in educationally effective practices, and to determine the extent to which this investment contributes positively to desired outcomes. Participants were sampled in the 2002, 2003, or 2004 administrations of the Community College Student Report (CCSR), the survey instrument of the Community College Survey of Student Engagement (CCSSE). The results of this study were consistent with the findings from previous research: African American students reported being more engaged and demonstrated generally lower academic outcomes than their White peers. Results for the Hispanic community college students exhibited a weak consistency with previous findings. For African American students, a select number of features emerged from these results that, in light of existing research, suggest that their self-reported levels of engagement may represent an Effort-Outcome Gap--the result of having to put forth more effort in attempting to compensate for a pervasive combination of academic and institutional barriers to educational success. Implications of the findings for both community college policy and practice are discussed. (Contains 6 tables and 6 notes.)

Published
2008

20. A Tale of Two Students: Building a Culture of Engagement in the Community College

Author

McClenney, Kay M. and Greene, Thomas

Abstract

In this article, the authors present two stories that depict the best and worst of times experienced by today's community college students. Within these narratives are both vestiges of the past--pieces that some colleges have yet to fully discard--and exemplars of a potentially brighter, more engaging future. While they are fictitious, these vignettes describe composite student experiences, both positive and negative, that are not atypical in community colleges. The stories are supported by findings from the Community College Survey of Student Engagement (CCSSE) and from twenty-four student focus groups conducted by CCSSE staff in 2003 and 2004. The authors hope that these vignettes will convey the importance of accurately understanding students' experiences at each college as they are told through systematically gathered evidence. In particular, the stories reinforce the critical importance of engaging students--connecting them early and often to one another, to faculty and staff, and to the subject matter of their studies. If nothing else, the stories emphasize the reality that in community colleges, given the multiple commitments of their students and the challenges they bring with them to college, engagement does not happen by accident but by design. (Contains 3 notes.)

Published
2005
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21. Observing Exoplanets with the James Webb Space Telescope

Author

Beichman, Charles A and Greene, Thomas P

Subjects
Astronomy
Abstract

The census of exoplanets has revealed an enormous variety of planets or- biting stars of all ages and spectral types: planets in orbits of less than a day to frigid worlds in orbits over 100 AU; planets with masses 10 times that of Jupiter to planets with masses less than that of Earth; searingly hot planets to temperate planets in the Habitable Zone. The challenge of the coming decade is to move from demography to physical characterization. The James Webb Space Telescope (JWST) is poised to open a revolutionary new phase in our understanding of exoplanets with transit spectroscopy of relatively short period planets and coronagraphic imaging of ones with wide separations from their host stars. This article discusses the wide variety of exoplanet opportunities enabled by JWSTs sensitivity and stability, its high angular resolution, and its suite of powerful instruments. These capabilities will advance our understanding of planet formation, brown dwarfs, and the atmospheres of young to mature planets.

Published
2017
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22. Multiwavelength Characterization of Exoplanets and their Host Stars with the Pandora SmallSat: Mission Status

Author

Rackham, Benjamin V., Quintana, Elisa V., Dotson, Jessie L., Colón, Knicole D., Barclay, Thomas, Supsinskas, Pete, Karburn, Jordan, Apai, Dániel, Hedges, Christina, Rowe, Jason F., Christiansen, Jessie L., Espinoza, Néstor, Foote, Trevor O., Gilbert, Emily A., Greene, Thomas P., Hoffman, Kelsey, Kostov, Veselin B., Lewis, Nikole K., Mason, James, Morris, Brett M., Mosby, Gregory, Mullally, Susan E., Newton, Elisabeth R., Pepper, Joshua, Schlieder, Joshua E., Stevenson, Kevin B., and Youngblood, Allison

Subjects
Physics::Space Physics, Astrophysics::Instrumentation and Methods for Astrophysics, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Earth and Planetary Astrophysics
Abstract

Transmission spectroscopy of transiting exoplanets provides our current best opportunity to study exoplanetary atmospheres, particularly those of smaller exoplanets. However, stellar photospheric heterogeneity due to spots and faculae complicates these studies by introducing spectral signals that can mimic or mask planetary features. The Pandora SmallSat Mission, selected in 2021 as part of NASA’s Astrophysics Pioneers Program, is designed to study the atmospheres of planets transiting active, low-mass stars by disentangling stellar and planetary signals in transmission spectra. Here we provide an overview of Pandora with a focus on the science enabled by its unique multiwavelength dataset. Pandora will observe multiple transits of at least 20 exoplanets with sizes ranging from Earth-size to Jupiter-size and host stars spanning mid-K to late-M spectral types. Pandora will collect long-duration photometric observations with a visible-light channel and simultaneous spectra with a near-IR channel. The broad wavelength coverage will provide constraints on the spot and faculae covering fractions of low-mass exoplanet host stars and the impact of these active regions on transmission spectra. Pandora will subsequently identify exoplanets with hydrogen- or water-dominated atmospheres and robustly determine which planets are covered by clouds and hazes. Pandora’s legacy will be a library of long-duration, simultaneous multiwavelength observations and a catalog of benchmark planets that will aid in target selection and data analysis for JWST and future exoplanet missions. The project is made possible by leveraging investments in other projects, including an all-aluminum 0.45-m Cassegrain telescope design and a NIR sensor chip assembly from JWST. The mission will last five years from initial formation to closeout, with one year of science operations. Launch is planned for the mid-2020s as a secondary payload in a Sun-synchronous low-Earth orbit. This timeline will ensure both rapid scientific results and operational overlap with TESS, HST, and JWST, enabling synergistic studies.

Published
2022
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23. Walking the Talk Is Tough: From a Single Technology Course to Infusion.

Author

Eifler, Karen E., Greene, Thomas G., and Carroll, James B.

Abstract

Teacher educators (n=12) completed a scaled assessment of technology use, responded to open-ended questions relating obstacles to their technology use, and participated in structured interviews. Results showed equipment was best used if the right human resources were available for technical assistance. Diverse attitudes about the role of technology were revealed. (Contains 19 references.) (JOW)

Published
2001

25. Spectroscopic Time Series Performance of the Mid-infrared Instrument on the JWST.

Author

Bouwman, Jeroen, Kendrew, Sarah, Greene, Thomas P., Bell, Taylor J., Lagage, Pierre-Olivier, Schreiber, Jürgen, Dicken, Daniel, Sloan, G. C., Espinoza, Néstor, Scheithauer, Silvia, Coulais, Alain, Fox, Ori D., Gastaud, René, Glauser, Adrian M., Jones, Olivia C., Labiano, Alvaro, Lahuis, Fred, Morrison, Jane E., Murray, Katherine, and Mueller, Michael

Subjects
TIME series analysis, SPACE telescopes, RANDOM noise theory, DATA analysis, NOISE
Abstract

We present here the first ever mid-infrared spectroscopic time series observation of the transiting exoplanet L 168-9 b with the Mid-Infrared Instrument (MIRI) on the James Webb Space Telescope. The data were obtained as part of the MIRI commissioning activities, to characterize the performance of the Low Resolution Spectroscopy (LRS) mode for these challenging observations. To assess the MIRI LRS performance, we performed two independent analyses of the data. We find that with a single transit observation we reached a spectro-photometric precision of ∼50 ppm in the 7–8 μ m range at R = 50, consistent with ∼25 ppm systematic noise. The derived band averaged transit depth is 524 ± 15 ppm and 547 ± 13 ppm for the two applied analysis methods, respectively, recovering the known transit depth to within 1 σ. The measured noise in the planet's transmission spectrum is approximately 15%–20% higher than random noise simulations over wavelengths 6.8 ≲ λ ≲ 11 μ m. We observed an larger excess noise at the shortest wavelengths of up to a factor of two, for which possible causes are discussed. This performance was achieved with limited in-flight calibration data, demonstrating the future potential of MIRI for the characterization of exoplanet atmospheres. [ABSTRACT FROM AUTHOR]

Published
2023
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26. Transiting Exoplanet Studies and Community Targets for JWST's Early Release Science Program

Author

Stevenson, Kevin B, Lewis, Nikole K, Bean, Jacob L, Beichman, Charles, Fraine, Jonathan, Kilpatrick, Brian M, Krick, J. E, Lothringer, Joshua D, Mandell, Avi M, Valenti, Jeff A, Agol, Eric, Angerhausen, Daniel, Barstow, Joanna K, Birkmann, Stephan M, Burrows, Adam, Charbonneau, David, Cowan, Nicolas B, Crouzet, Nicolas, Cubillos, Patricio E, Curry, S. M, Dalba, Paul A, de Wit, Julien, Greene, Thomas P, Line, Michael R, and Wakeford, Hannah R

Subjects
Lunar And Planetary Science And Exploration
Abstract

The James Webb Space Telescope (JWST) will likely revolutionize transiting exoplanet atmospheric science, due to a combination of its capability for continuous, long duration observations and its larger collecting area, spectral coverage, and spectral resolution compared to existing space-based facilities. However, it is unclear precisely how well JWST will perform and which of its myriad instruments and observing modes will be best suited for transiting exoplanet studies. In this article, we describe a prefatory JWST Early Release Science (ERS) Cycle1 program that focuses on testing specific observing modes to quickly give the community the data and experience it needs to plan more efficient and successful transiting exoplanet characterization programs in later cycles. We propose a multi-pronged approach wherein one aspect of the program focuses on observing transits of a single target with all of the recommended observing modes to identify and understand potential systematics, compare transmission spectra at overlapping and neighboring wavelength regions, confirm throughputs, and determine overall performances. In our search for transiting exoplanets that are well suited to achieving these goals, we identify 12 objects (dubbed community targets) that meet our defined criteria. Currently, the most favorable target is WASP-62b because of its large predicted signal size, relatively bright host star, and location in JWSTs continuous viewing zone. Since most of the community targets do not have well-characterized atmospheres, we recommend initiating preparatory observing programs to determine the presence of obscuring cloudshazes within their atmospheres. Measurable spectroscopic features are needed to establish the optimal resolution and wavelength regions for exoplanet characterization. Other initiatives from our proposed ERS program include testing the instrument brightness limits and performing phase-curve observations. The latter are a unique challenge compared to transit observations because of their significantly longer durations. Using only a single mode, we propose to observe a full-orbit phase curve of one of the previously characterized, short-orbital-period planets to evaluate the facility-level aspects of long, uninterrupted time-series observations.

Published
2016
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28. State Governments and Multicultural Education Policy.

Author

Greene, Thomas G. and Heflin, John F.

Abstract

Provides a rationale for state government involvement in multicultural education policy development, and assesses current trends of state government promotions of multicultural education. Presents a framework for examining the issue, background information, a description of trends in state multicultural education policies, and conclusions about the importance of policy mandates. (SLD)

Published
1992

29. Performance of NIRCam on JWST in Flight.

Author

Rieke, Marcia J., Kelly, Douglas M., Misselt, Karl, Stansberry, John, Boyer, Martha, Beatty, Thomas, Egami, Eiichi, Florian, Michael, Greene, Thomas P., Hainline, Kevin, Leisenring, Jarron, Roellig, Thomas, Schlawin, Everett, Sun, Fengwu, Tinnin, Lee, Williams, Christina C., Willmer, Christopher N. A., Wilson, Debra, Clark, Charles R., and Rohrbach, Scott

Subjects
SPACE telescopes, INFRARED cameras, CAMERAS, ASTRONOMERS
Abstract

The Near Infrared Camera for the James Webb Space Telescope (JWST) is delivering the imagery that astronomers have hoped for ever since JWST was proposed back in the 1990s. In the Commissioning Period that extended from right after launch to early 2022 July, NIRCam has been subjected to a number of performance tests and operational checks. The camera is exceeding prelaunch expectations in virtually all areas, with very few surprises discovered in flight. NIRCam also delivered the imagery needed by the Wavefront Sensing Team for use in aligning the telescope mirror segments. [ABSTRACT FROM AUTHOR]

Published
2023
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30. Spectroscopic Time-series Performance of JWST/NIRSpec from Commissioning Observations.

Author

Espinoza, Néstor, Úbeda, Leonardo, Birkmann, Stephan M., Ferruit, Pierre, Valenti, Jeff A., Sing, David K., Rustamkulov, Zafar, Regan, Michael, Kendrew, Sarah, Sabbi, Elena, Schlawin, Everett, Beatty, Thomas, Albert, Loïc, Greene, Thomas P., Nikolov, Nikolay, Karakla, Diane, Keyes, Charles, Alves de Oliveira, Catarina, Böker, Torsten, and Pena-Guerrero, Maria

Abstract

We report on James Webb Space Telescope (JWST) commissioning observations of the transiting exoplanet HAT-P-14 b, obtained using the Bright Object Time Series (BOTS) mode of the NIRSpec instrument with the G395H/F290LP grating/filter combination (3–5 μ m). While the data were used primarily to verify that the NIRSpec BOTS mode is working as expected, and to enable it for general scientific use, they yield a precise transmission spectrum which we find is featureless down to the precision level of the instrument, consistent with expectations given HAT-P-14 b's small scale-height and hence expected atmospheric features. The exquisite quality and stability of the JWST/NIRSpec transit spectrum—almost devoid of any systematic effects—allowed us to obtain median uncertainties of 50–60 ppm in this wavelength range at a resolution of R = 100 in a single exposure, which is in excellent agreement with pre-flight expectations and close to the (or at the) photon-noise limit for a J = 9.094, F-type star like HAT-P-14. These observations showcase the ability of NIRSpec/BOTS to perform cutting-edge transiting exoplanet atmospheric science, setting the stage for observations and discoveries to be made in Cycle 1 and beyond. [ABSTRACT FROM AUTHOR]

Published
2023
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31. JWST NIRCam Defocused Imaging: Photometric Stability Performance and How It Can Sense Mirror Tilts.

Author

Schlawin, Everett, Beatty, Thomas, Brooks, Brian, Nikolov, Nikolay K., Greene, Thomas P., Espinoza, Néstor, Glidic, Kayli, Baka, Keith, Egami, Eiichi, Stansberry, John, Boyer, Martha, Gennaro, Mario, Leisenring, Jarron, Hilbert, Bryan, Misselt, Karl, Kelly, Doug, Canipe, Alicia, Beichman, Charles, Correnti, Matteo, and Knight, J. Scott

Abstract

We use JWST NIRCam short-wavelength photometry to capture a transit lightcurve of the exoplanet HAT-P-14 b to assess performance as part of instrument commissioning. The short-wavelength precision is 152 ppm per 27 s integration as measured over the full time series compared to a theoretical limit of 107 ppm, after corrections to spatially correlated 1/f noise. Persistence effects from charge trapping are well fit by an exponential function with short characteristic timescales, settling on the order of 5–15 minutes. The short-wavelength defocused photometry is also uniquely well suited to measure the real-time wave-front error of JWST. Analysis of the images and reconstructed wave-front maps indicates that two different hexagonal primary mirror segments exhibited "tilt events," where they changed orientation rapidly in less than ∼1.4 s. In some cases, the magnitude and timing of the flux jumps caused by tilt events can be accurately predicted with a telescope model. These tilt events can be sensed by simultaneous longer-wavelength NIRCam grism spectral images alone in the form of changes to the point-spread function, diagnosed from the full width at half maximum. They can also be sensed with the fine guidance sensor instrument from difference images. Tilt events possibly from sudden releases of stress in the backplane structure behind the mirrors were expected during the commissioning period because they were found in ground-based testing. Tilt events have shown signs of decreasing in frequency but have not disappeared completely. The detectors exhibit some minor (less than 1%) deviations from linear behavior in the first few groups of each integration, potentially impacting absolute fluxes and transit depths on bright targets, where only a handful of groups are possible. Overall, the noise is within 50% of the theoretical photon noise and read noise. This bodes well for high-precision measurements of transiting exoplanets and other time variable targets. [ABSTRACT FROM AUTHOR]

Published
2023
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32. The Pandora SmallSat: Multiwavelength Characterization of Exoplanets and their Host Stars

Author

Quintana, Elisa V., Colón, Knicole D., Mosby, Greg, Schlieder, Joshua E., Supsinskas, Pete, Karburn, Jordan, Dotson, Jessie L., Greene, Thomas P., Hedges, Christina, Apai, Dániel, Barclay, Thomas, Christiansen, Jessie L., Espinoza, Néctor, Mullally, Susan E., Gilbert, Emily A., Hoffman, Kelsey, Kostov, Veselin B., Lewis, Nikole K., Foote, Trevor O., Mason, James, Youngblood, Allison, Morris, Brett, Newton, Elizabeth R., Pepper, Joshua, Rackham, Benjamin V., Rowe, Jason F., and Stevenson, Kevin

Subjects
Earth and Planetary Astrophysics (astro-ph.EP), Physics::Space Physics, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Astrophysics::Galaxy Astrophysics, Astrophysics - Earth and Planetary Astrophysics
Abstract

Pandora is a SmallSat mission designed to study the atmospheres of exoplanets, and was selected as part of NASA's Astrophysics Pioneers Program. Transmission spectroscopy of transiting exoplanets provides our best opportunity to identify the makeup of planetary atmospheres in the coming decade. Stellar brightness variations due to star spots, however, can impact these measurements and contaminate the observed spectra. Pandora's goal is to disentangle star and planet signals in transmission spectra to reliably determine exoplanet atmosphere compositions. Pandora will collect long-duration photometric observations with a visible-light channel and simultaneous spectra with a near-IR channel. The broad-wavelength coverage will provide constraints on the spot and faculae covering fractions of low-mass exoplanet host stars and the impact of these active regions on exoplanetary transmission spectra. Pandora will subsequently identify exoplanets with hydrogen- or water-dominated atmospheres, and robustly determine which planets are covered by clouds and hazes. Pandora will observe at least 20 exoplanets with sizes ranging from Earth-size to Jupiter-size and host stars spanning mid-K to late-M spectral types. The project is made possible by leveraging investments in other projects, including an all-aluminum 0.45-meter Cassegrain telescope design, and a NIR sensor chip assembly from the James Webb Space Telescope. The mission will last five years from initial formulation to closeout, with one-year of science operations. Launch is planned for the mid-2020s as a secondary payload in Sun-synchronous low-Earth orbit. By design, Pandora has a diverse team, with over half of the mission leadership roles filled by early career scientists and engineers, demonstrating the high value of SmallSats for developing the next generation of space mission leaders., Proceedings of the Small Satellite Conference, Science/Mission Payloads, SSC21-VI-02 (2021)

Published
2021

35. Tentative Evidence for Water Vapor in the Atmosphere of the Neptune-sized Exoplanet HD 106315c.

Author

Kreidberg, Laura, Mollière, Paul, Crossfield, Ian J. M., Thorngren, Daniel P., Kawashima, Yui, Morley, Caroline V., Benneke, Björn, Mikal-Evans, Thomas, Berardo, David, Kosiarek, Molly R., Gorjian, Varoujan, Ciardi, David R., Christiansen, Jessie L., Dragomir, Diana, Dressing, Courtney D., Fortney, Jonathan J., Fulton, Benjamin J., Greene, Thomas P., Hardegree-Ullman, Kevin K., and Howard, Andrew W.

Published
2022
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36. First Peek with JWST/NIRCam Wide-field Slitless Spectroscopy: Serendipitous Discovery of a Strong [O iii ]/H α Emitter at z = 6.11.

Author

Sun, Fengwu, Egami, Eiichi, Pirzkal, Nor, Rieke, Marcia, Boyer, Martha, Correnti, Matteo, Gennaro, Mario, Girard, Julien, Greene, Thomas P., Kelly, Doug, Koekemoer, Anton M., Leisenring, Jarron, Misselt, Karl, Nikolov, Nikolay, Roellig, Thomas L., Stansberry, John, Williams, Christina C., and Willmer, Christopher N. A.

Published
2022
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39. Science Opportunities with the Near-IR Camera (NIRCam) on the James Webb Space Telescope (JWST)

Author

Beichman, Charles A, Rieke, Marcia, Eisenstein, Daniel, Greene, Thomas P, Krist, John, McCarthy, Don, Meyer, Michael, and Stansberry, John

Subjects
Astrophysics
Abstract

The Near-Infrared Camera (NIRCam) on the James Webb Space Telescope (JWST) offers revolutionary gains in sensitivity throughout the 1-5 micrometer region. NIRCam will enable great advances in all areas of astrophysics, from the composition of objects in our own Kuiper Belt and the physical properties of planets orbiting nearby stars to the formation of stars and the detection of the youngest galaxies in the Universe. NIRCam also plays an important role in initial alignment of JWST and the long term maintenance of its image quality. NIRCam is presently undergoing instrument Integration and Test in preparation for delivery to the JWST project. Key near-term milestones include the completion of cryogenic testing of the entire instrument; demonstration of scientific and wavefront sensing performance requirements; testing of replacement H2RG detectors arrays; and an analysis of coronagraphic performance in light of measured telescope wavefront characteristics. This paper summarizes the performance of NIRCam, the scientific and education/outreach goals of the science team, and some results of the on-going testing program.

Published
2012

40. James Webb Space Telescope (JWST) and Star Formation

Author

Greene, Thomas P

Subjects
Astronomy
Abstract

The 6.5-m aperture James Webb Space Telescope (JWST) will be a powerful tool for studying and advancing numerous areas of astrophysics. Its Fine Guidance Sensor, Near-Infrared Camera, Near-Infrared Spectrograph, and Mid-Infrared Instrument will be capable of making very sensitive, high angular resolution imaging and spectroscopic observations spanning 0.7 - 28 ?m wavelength. These capabilities are very well suited for probing the conditions of star formation in the distant and local Universe. Indeed, JWST has been designed to detect first light objects as well as to study the fine details of jets, disks, chemistry, envelopes, and the central cores of nearby protostars. We will be able to use its cameras, coronagraphs, and spectrographs (including multi-object and integral field capabilities) to study many aspects of star forming regions throughout the galaxy, the Local Group, and more distant regions. I will describe the basic JWST scientific capabilities and illustrate a few ways how they can be applied to star formation issues and conditions with a focus on Galactic regions.

Published
2010

42. Spectroscopic Detection of a Stellar-like Photosphere in an Accreting Protostar

Author

Greene, Thomas P, Lada, Charles J, and DeVincenzi, Donald L

Subjects
Astronomy
Abstract

We present high-resolution (R is approximately equal to 18,000), high signal-to-noise 2 micron spectra of two luminous, X-ray flaring Class I protostars in the rho Ophiuchi cloud acquired with the NIRSPEC (near infrared spectrograph) of the Keck II telescope. We present the first spectrum of a highly veiled, strongly accreting protostar which shows photospheric absorption features and demonstrates the stellar nature of its central core. We find the spectrum of the luminous (L (sub bol) = 10 solar luminosity) protostellar source, YLW 15, to be stellar-like with numerous atomic and molecular absorption features, indicative of a K5 IV/V spectral type and a continuum veiling r(sub k) = 3.0. Its derived stellar luminosity (3 stellar luminosity) and stellar radius (3.1 solar radius) are consistent with those of a 0.5 solar mass pre-main-sequence star. However, 70% of its bolometric luminosity is due to mass accretion, whose rate we estimate to be 1.7 x 10(exp -6) solar masses yr(exp -1). We determine that excess infrared emission produced by the circumstellar accretion disk, the inner infalling envelope, and accretion shocks at the surface of the stellar core of YLW 15 all contribute significantly to its near-IR (infrared) continuum veiling. Its rotational velocity v sin i = 50 km s(exp -1) is comparable to those of flat-spectrum protostars but considerably higher than those of classical T Tauri stars in the rho Oph cloud. The protostar may be magnetically coupled to its circumstellar disk at a radius of 2 - 3 R(sub *). It is also plausible that this protostar can shed over half its angular momentum and evolve into a more slowly rotating classical T Tauri star by remaining coupled to its circumstellar disk (at increasing radius) as its accretion rate drops by an order of magnitude during the rapid transition between the Class I and Class II phases of evolution. The spectrum of WL 6 does not show any photospheric absorption features, and we estimate that its continuum veiling is r(sub k) is greater than or equal to 4.6. Its low luminosity (2 solar masses) and high veiling dictate that its central protostar is very low mass, M is approx. 0.1 solar masses. We also evaluate multi-epoch X ray data along with these spectra and conclude that the X ray variabilities of these sources are not directly related to their protostellar rotation velocities.

Published
2002

43. Observing Planetary Systems in the Making

Author

Andrea Isella, Luca Ricci, Sean Andrews, Clément Baruteau, Jean-Philippe Berger, Edwin Bergin, Til Birnstiel, Brendan Bowler, Crystal Brogan, Carlos Carrasco Gonzalez, Claire Chandler, Thayne Currie, Jeffrey Cuzzi, Angelo, Gennaro D., Ruobing Dong, Gaspard Duchene, Anne Dutrey, Barbara Ercolano, Catherine Espaillat, Paul Estrada, Mario Flock, Andras Gaspar, Greene, Thomas P., Jane Huang, Hannah Jang-Condell, Christopher Johns-Krull, Grant Kennedy, Serena Kim, J., Florian Kirchschlager, Stefan Kraus, Sebastiaan Krijt, Hui Li, Wladimir Lyra, Bruce Macintosh, John Monnier, Karin Oberg, Ilaria Pascucci, Laura Perez, Romain Petrov, Paola Pinilla, Stephen Ridgway, Keivan Stassun, Theo ten Brummelaar, Leonardo Testi, Turner, Neal J., Gerard van Belle, Nienke van Der Marel, Alycia Weinberger, Jacob White, Jonathan Williams, David Wilner, Alwyn Wootten, Ya-Lin Wu, Andrew Youdin, Ke Zhang, Zhaohuan Zhu, Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Harvard-Smithsonian Center for Astrophysics (CfA), Harvard University-Smithsonian Institution, McDonald Observatory, University of Texas at Austin [Austin], NASA Ames Research Center (ARC), Steward Observatory, University of Arizona, Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), AMOR 2019, Laboratoire d'Astrophysique de Bordeaux [Pessac] (LAB), Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Search for Extraterrestrial Intelligence Institute (SETI), Max-Planck-Institut für Radioastronomie (MPIFR), Department of Astrophysics, American Museum of Natural History (AMNH), Umeå University, Molecular Genetics Unit, Instituto de Salud Carlos III [Madrid] (ISC)-Carretera Pozuelo - Callejero de Majadahonda- Instituto de Investigación en Enfermedades Raras (IIER), Laboratoire Universitaire d'Astrophysique de Nice (LUAN), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), National Optical Astronomy Observatory (NOAO), Center for High Angular Resolution Astronomy (CHARA), Georgia State University, University System of Georgia (USG)-University System of Georgia (USG), INAF - Osservatorio Astrofisico di Arcetri (OAA), Istituto Nazionale di Astrofisica (INAF), School of Mathematical and Statistical Sciences (Arizona, Tempe), Arizona State University [Tempe] (ASU), Centre Européen de Réalité Virtuelle (CERV), École Nationale d'Ingénieurs de Brest (ENIB), Flathead Lake Biological Station, University of Montana, Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7), Smithsonian Institution-Harvard University [Cambridge], American Museum of Natural History, Université Nice Sophia Antipolis (... - 2019) (UNS), Rice University [Houston], Joseph Louis LAGRANGE (LAGRANGE), Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Harvard University [Cambridge]-Smithsonian Institution, Laboratoire d'Astrophysique de Grenoble (LAOG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Instituto de Salud Carlos III (ISC)-Carretera Pozuelo - Callejero de Majadahonda- Instituto de Investigación en Enfermedades Raras (IIER), and Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Computer Science::Computer Vision and Pattern Recognition, Physics::Space Physics, [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, Astrophysics::Earth and Planetary Astrophysics, GeneralLiterature_MISCELLANEOUS, Astrophysics::Galaxy Astrophysics, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM]
Abstract

International audience; We discuss science cases to support the development of sub-au imaging capabilities to image forming planets in the terrestrial region of nearby proto-planetary disks.

Published
2019

45. HIFOGS: Its design, operations and calibration

Author

Witteborn, Fred C, Cohen, Martin, Bregman, Jesse D, Heere, Karen R, Greene, Thomas P, and Wooden, Diane H

Subjects
Instrumentation And Photography
Abstract

The High-efficiency, Infrared Faint Object Grating Spectrometer (HIFOGS) provides spectral coverage of selectable portions of the 3 to 18 micron range at resolving powers from 00 to 1000 using 120 Si/Bi detectors. Additional coverage to 30 microns is provided by a bank of 32 Si:P detectors. Selectable apertures, gratings and band-pass filters provide flexibility to this system. Software for operation of HIFOGS and reduction of the data runs on a MacIntosh computer. HIFOGS has been used to establish celestial flux standards using 3 independent approaches: comparison to star models, comparisons to asteroid models and comparisons to laboratory blackbodies. These standards are expected to have wide application in astronomical thermal-infrared spectroscopy.

Published
1995

46. Infrared images of the young cluster NGC 2264

Author

Lada, Charles J, Young, Erick T, and Greene, Thomas P

Subjects
Astrophysics
Abstract

Initial results of an extensive IR imaging survey of the young cluster NGC 2264 and a nearby galactic control field are presented. A large portion of the cluster was imaged in each of the three standard near-IR colors (J, H, and K) with an IR array camera. On the basis of a comparison of these observations, the size of the cluster population is estimated, and the nature of its members is investigated. The cluster is found to contain 360 +/- 130 members. The slope of the K luminosity function of the cluster is significantly steeper than that expected for a cluster of ZAMS stars, and appears to flatten out or turn over at an apparent K magnitude of roughly 13.0-14.0. An analysis of the JHK color-color diagrams of the cluster and control fields shows that approximately 170 sources observed toward the cluster have colors indicative of intrinsic excess IR emission.

Published
1993
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47. IRAS observations of young stellar objects in the Corona Australis dark cloud

Author

Wilking, Bruce A, Greene, Thomas P, Lada, Charles J, Meyer, Michael R, and Young, Erick T

Subjects
Astrophysics
Abstract

The young stellar object (YSO) population associated with the dark cloud complex in Corona Australis is studied by synthesizing IRAS data with newly obtained near-IR and mid-IR photometry and previously published optical/IR data. Twenty-four YSOs in the Cr A complex are identified. The observed range of spectral energy distribution shapes and bolometric luminosities are consistent with those observed in other dark clouds. The duration and efficiency of star formation are found to be similar to the Rho Ophiuchi IR cluster. The low number of YSOs compared to other dark clouds is understood by a reevaluation of the molecular mass of the R Cr A cloud which shows it to be much less massive than previously assumed.

Published
1992
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48. Near-infrared observations of young stellar objects in the Rho Ophiuchi dark cloud

Author

Greene, Thomas P and Young, Erick T

Subjects
Astrophysics
Abstract

We have conducted an imaging survey of 1.4 sq pc of the Rho Ophiuchi dark cloud in the J, H, and K near-infrared photometric bands. Approximately 337 of our 481 detected sources are associated with the cloud, and we estimate that 48 percent of these have near-infrared excesses, indicative of disks or circumstellar material surrounding these young stellar objects (YSOs). The K-band luminosity function is significantly different in different regions of our survey area, suggesting that YSOs in these regions have different ages or mass functions. We estimate that the entire survey area has a high star-formation efficiency, at roughly 23 percent. Finally, our many newly detected sources provide a relatively large, uniformly sensitive sample of objects for study at longer wavelengths to better determine true source luminosities and evolutionary lifetimes.

Published
1992
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49. The Rho Ophiuchi cloud young stellar population - Results of a near-infrared study

Author

Greene, Thomas P and Young, Erick T

Subjects
Astrophysics
Abstract

An imaging survey of 1.4 sq pc of the Rho Ophiuchi dark cloud in the J, H, and K near-infrared photometric bands was conducted. Approximately 332 of the 481 detected sources are associated with the cloud, and 30 percent of these have near-infrared excesses, indicative of disks or circumstellar material surrounding these young stellar objects (YSOs). The K-band luminosity function is significantly different in different regions of the survey area, suggesting that YSOs in these regions have different ages or mass functions. The entire survey area has a high star formation efficiency of about 23 percent. Finally, many newly detected sources provide a relatively large, uniformly sensitive sample of objects for study at longer wavelengths to better determine true source luminosities and evolutionary lifetimes.

Published
1991

50. Transmission Spectroscopy for the Warm Sub-Neptune HD 3167c: Evidence for Molecular Absorption and a Possible High-metallicity Atmosphere.

Author

Mikal-Evans, Thomas, Crossfield, Ian J. M., Benneke, Björn, Kreidberg, Laura, Moses, Julie, Morley, Caroline V., Thorngren, Daniel, Molličre, Paul, Hardegree-Ullman, Kevin K., Brewer, John, Christiansen, Jessie L., Ciardi, David R., Dragomir, Diana, Dressing, Courtney, Fortney, Jonathan J., Gorjian, Varoujan, Greene, Thomas P., Hirsch, Lea A., Howard, Andrew W., and Howell, Steve B.

Published
2021
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