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33 results on '"Ricarte A"'

1. X-Ray Bright Active Galactic Nuclei in Local Dwarf Galaxies: Insights from eROSITA

Author

Andrea Sacchi, Ákos Bogdán, Urmila Chadayammuri, and Angelo Ricarte

Subjects
X-ray active galactic nuclei, Dwarf galaxies, Accretion, Supermassive black holes, Astrophysics, QB460-466
Abstract

Although supermassive black holes (SMBHs) reside in the heart of virtually every massive galaxy, it remains debated whether dwarf galaxies commonly host SMBHs. Because low-mass galaxies may retain memory of the assembly history of their black holes (BHs), probing the BH occupation fraction of local dwarf galaxies might offer insights into the growth and seeding mechanisms of the first BHs. In this work, we exploit the Western half of the eROSITA all-sky survey (covering 20,000 deg ^2 ) and compile a catalog of accreting SMBHs in local ( D < 200 Mpc) dwarf galaxies. Cleaning our sample from X-ray background sources, X-ray binaries, and ultraluminous X-ray sources, we identify 74 active galactic nucleus (AGN)–dwarf galaxy pairs. Using this large and uniform sample, we derive the luminosity function of the dwarf galaxy AGN, fitting it with a power-law function and obtaining $dN/d{L}_{{\rm{X}}}=(15.9\pm 2.2)\times {L}_{{\rm{X}}}^{-1.63\pm 0.05}$ . Measuring the offset between the dwarf galaxies' centroids and the X-ray sources, we find that ≈50% of the AGN are likely off-nuclear, in agreement with theoretical predictions. We compare the BH-to-stellar mass relation of our sample with the local and high-redshift relations, finding that our sources better adhere to the former, which suggests that local AGN across different mass scales undergo similar growth histories. Finally, we compare our sources with semianalytical models: while our sample’s shallowness prevents distinguishing between different seeding models, we find that the data favor models that keep SMBHs in dwarf galaxies active at a moderate rate, motivating model improvement by comparison to AGN in the dwarf galaxy regime.

Published
2024
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2. Multifrequency Black Hole Imaging for the Next-generation Event Horizon Telescope

Author

Andrew Chael, Sara Issaoun, Dominic W. Pesce, Michael D. Johnson, Angelo Ricarte, Christian M. Fromm, and Yosuke Mizuno

Subjects
Supermassive black holes, Astrophysical black holes, High angular resolution, Astronomical techniques, Astronomy image processing, Relativistic jets, Astrophysics, QB460-466
Abstract

The Event Horizon Telescope (EHT) has produced images of the plasma flow around the supermassive black holes in Sgr A* and M87* with a resolution comparable to the projected size of their event horizons. Observations with the next-generation Event Horizon Telescope (ngEHT) will have significantly improved Fourier plane coverage and will be conducted at multiple frequency bands (86, 230, and 345 GHz), each with a wide bandwidth. At these frequencies, both Sgr A* and M87* transition from optically thin to optically thick. Resolved spectral index maps in the near-horizon and jet-launching regions of these supermassive black hole sources can constrain properties of the emitting plasma that are degenerate in single-frequency images. In addition, combining information from data obtained at multiple frequencies is a powerful tool for interferometric image reconstruction, since gaps in spatial scales in single-frequency observations can be filled in with information from other frequencies. Here we present a new method of simultaneously reconstructing interferometric images at multiple frequencies along with their spectral index maps. The method is based on existing regularized maximum likelihood (RML) methods commonly used for EHT imaging and is implemented in the eht-imaging Python software library. We show results of this method on simulated ngEHT data sets as well as on real data from the Very Long Baseline Array and Atacama Large Millimeter/submillimeter Array. These examples demonstrate that simultaneous RML multifrequency image reconstruction produces higher-quality and more scientifically useful results than is possible from combining independent image reconstructions at each frequency.

Published
2023
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3. Comparison of Polarized Radiative Transfer Codes Used by the EHT Collaboration

Author

Ben S. Prather, Jason Dexter, Monika Moscibrodzka, Hung-Yi Pu, Thomas Bronzwaer, Jordy Davelaar, Ziri Younsi, Charles F. Gammie, Roman Gold, George N. Wong, Kazunori Akiyama, Antxon Alberdi, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Uwe Bach, Anne-Kathrin Baczko, David Ball, Mislav Baloković, John Barrett, Michi Bauböck, Bradford A. Benson, Dan Bintley, Lindy Blackburn, Raymond Blundell, Katherine L. Bouman, Geoffrey C. Bower, Hope Boyce, Michael Bremer, Christiaan D. Brinkerink, Roger Brissenden, Silke Britzen, Avery E. Broderick, Dominique Broguiere, Sandra Bustamante, Do-Young Byun, John E. Carlstrom, Chiara Ceccobello, Andrew Chael, Chi-kwan Chan, Dominic O. Chang, Koushik Chatterjee, Shami Chatterjee, Ming-Tang Chen, Yongjun Chen, Xiaopeng Cheng, Ilje Cho, Pierre Christian, Nicholas S. Conroy, John E. Conway, James M. Cordes, Thomas M. Crawford, Geoffrey B. Crew, Alejandro Cruz-Osorio, Yuzhu Cui, Mariafelicia De Laurentis, Roger Deane, Jessica Dempsey, Gregory Desvignes, Vedant Dhruv, Sheperd S. Doeleman, Sean Dougal, Sergio A. Dzib, Ralph P. Eatough, Razieh Emami, Heino Falcke, Joseph Farah, Vincent L. Fish, Ed Fomalont, H. Alyson Ford, Raquel Fraga-Encinas, William T. Freeman, Per Friberg, Christian M. Fromm, Antonio Fuentes, Peter Galison, Roberto García, Olivier Gentaz, Boris Georgiev, Ciriaco Goddi, Arturo I. Gómez-Ruiz, José L. Gómez, Minfeng Gu, Mark Gurwell, Kazuhiro Hada, Daryl Haggard, Kari Haworth, Michael H. Hecht, Ronald Hesper, Dirk Heumann, Luis C. Ho, Paul Ho, Mareki Honma, Chih-Wei L. Huang, Lei Huang, David H. Hughes, Shiro Ikeda, C. M. Violette Impellizzeri, Makoto Inoue, Sara Issaoun, David J. James, Buell T. Jannuzi, Michael Janssen, Britton Jeter, Wu Jiang, Alejandra Jiménez-Rosales, Michael D. Johnson, Svetlana Jorstad, Abhishek V. Joshi, Taehyun Jung, Mansour Karami, Ramesh Karuppusamy, Tomohisa Kawashima, Garrett K. Keating, Mark Kettenis, Dong-Jin Kim, Jae-Young Kim, Jongsoo Kim, Junhan Kim, Motoki Kino, Jun Yi Koay, Prashant Kocherlakota, Yutaro Kofuji, Shoko Koyama, Carsten Kramer, Michael Kramer, Thomas P. Krichbaum, Cheng-Yu Kuo, Noemi La Bella, Tod R. Lauer, Daeyoung Lee, Sang-Sung Lee, Po Kin Leung, Aviad Levis, Zhiyuan Li, Rocco Lico, Greg Lindahl, Michael Lindqvist, Mikhail Lisakov, Jun Liu, Kuo Liu, Elisabetta Liuzzo, Wen-Ping Lo, Andrei P. Lobanov, Laurent Loinard, Colin J. Lonsdale, Ru-Sen Lu, Nicholas R. MacDonald, Jirong Mao, Nicola Marchili, Sera Markoff, Daniel P. Marrone, Alan P. Marscher, Iván Martí-Vidal, Satoki Matsushita, Lynn D. Matthews, Lia Medeiros, Karl M. Menten, Daniel Michalik, Izumi Mizuno, Yosuke Mizuno, James M. Moran, Kotaro Moriyama, Cornelia Müller, Alejandro Mus, Gibwa Musoke, Ioannis Myserlis, Andrew Nadolski, Hiroshi Nagai, Neil M. Nagar, Masanori Nakamura, Ramesh Narayan, Gopal Narayanan, Iniyan Natarajan, Antonios Nathanail, Santiago Navarro Fuentes, Joey Neilsen, Roberto Neri, Chunchong Ni, Aristeidis Noutsos, Michael A. Nowak, Junghwan Oh, Hiroki Okino, Héctor Olivares, Gisela N. Ortiz-León, Tomoaki Oyama, Feryal Özel, Daniel C. M. Palumbo, Georgios Filippos Paraschos, Jongho Park, Harriet Parsons, Nimesh Patel, Ue-Li Pen, Dominic W. Pesce, Vincent Piétu, Richard Plambeck, Aleksandar PopStefanija, Oliver Porth, Felix M. Pötzl, Jorge A. Preciado-López, Dimitrios Psaltis, Venkatessh Ramakrishnan, Ramprasad Rao, Mark G. Rawlings, Alexander W. Raymond, Luciano Rezzolla, Angelo Ricarte, Bart Ripperda, Freek Roelofs, Alan Rogers, Eduardo Ros, Cristina Romero-Cañizales, Arash Roshanineshat, Helge Rottmann, Alan L. Roy, Ignacio Ruiz, Chet Ruszczyk, Kazi L. J. Rygl, Salvador Sánchez, David Sánchez-Argüelles, Miguel Sánchez-Portal, Mahito Sasada, Kaushik Satapathy, Tuomas Savolainen, F. Peter Schloerb, Jonathan Schonfeld, Karl-Friedrich Schuster, Lijing Shao, Zhiqiang Shen, Des Small, Bong Won Sohn, Jason SooHoo, Kamal Souccar, He Sun, Fumie Tazaki, Alexandra J. Tetarenko, Paul Tiede, Remo P. J. Tilanus, Michael Titus, Pablo Torne, Efthalia Traianou, Tyler Trent, Sascha Trippe, Matthew Turk, Ilse van Bemmel, Huib Jan van Langevelde, Daniel R. van Rossum, Jesse Vos, Jan Wagner, Derek Ward-Thompson, John Wardle, Jonathan Weintroub, Norbert Wex, Robert Wharton, Maciek Wielgus, Kaj Wiik, Gunther Witzel, Michael F. Wondrak, Qingwen Wu, Paul Yamaguchi, Aristomenis Yfantis, Doosoo Yoon, André Young, Ken Young, Wei Yu, Feng Yuan, Ye-Fei Yuan, J. Anton Zensus, Shuo Zhang, Guang-Yao Zhao, Shan-Shan Zhao, and The Event Horizon Telescope Collaboration

Subjects
Supermassive black holes, Radiative transfer simulations, Astronomy software, Astrophysics, QB460-466
Abstract

Interpretation of resolved polarized images of black holes by the Event Horizon Telescope (EHT) requires predictions of the polarized emission observable by an Earth-based instrument for a particular model of the black hole accretion system. Such predictions are generated by general relativistic radiative transfer (GRRT) codes, which integrate the equations of polarized radiative transfer in curved spacetime. A selection of ray-tracing GRRT codes used within the EHT Collaboration is evaluated for accuracy and consistency in producing a selection of test images, demonstrating that the various methods and implementations of radiative transfer calculations are highly consistent. When imaging an analytic accretion model, we find that all codes produce images similar within a pixel-wise normalized mean squared error (NMSE) of 0.012 in the worst case. When imaging a snapshot from a cell-based magnetohydrodynamic simulation, we find all test images to be similar within NMSEs of 0.02, 0.04, 0.04, and 0.12 in Stokes I , Q , U , and V , respectively. We additionally find the values of several image metrics relevant to published EHT results to be in agreement to much better precision than measurement uncertainties.

Published
2023
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4. Constraints From Dwarf Galaxies on Black Hole Seeding and Growth Models With Current and Future Surveys

Author

Urmila Chadayammuri, Ákos Bogdán, Angelo Ricarte, and Priyamvada Natarajan

Subjects
Supermassive BHs, X-ray surveys, Sky surveys, Active galactic nuclei, Astrophysics, QB460-466
Abstract

Dwarf galaxies are promising test beds for constraining models of supermassive and intermediate-mass black holes (MBHs) via their BH occupation fraction (BHOF). Disentangling seeding from the confounding effects of mass assembly over a Hubble time is a challenging problem that we tackle in this study with a suite of semianalytical models (SAMs). We show how the measured BHOF depends on the lowest BH mass or active galactic nucleus (AGN) luminosity achieved by a survey. To tell seeding models apart, we need to detect or model all AGNs brighter than 10 ^37 erg s ^−1 in galaxies of M _* ∼ 10 ^8−10 M _⊙ . Shallower surveys, like eRASS, cannot distinguish between seed models even with the compensation of a much larger survey volume. We show that the AMUSE survey, with its inference of the MBH population underlying the observed AGNs, strongly favors heavy seed models, growing with either a power-law Eddington ratio distribution function or one in which BH accretion is tied to the star formation rate (i.e., the AGN-main sequence, AGN-MS, model). These two growth channels can then be distinguished by the AGN luminosity function at >10 ^40 erg s ^−1 , with the AGN-MS model requiring more accretion than observed at z ∼ 0. Thus, current X-ray observations favor heavy seeds whose Eddington ratios follow a power-law distribution. The different models also predict different radio scaling relations, which we quantify using the fundamental plane of BH activity. We close with recommendations for the design of upcoming multiwavelength campaigns that can optimally detect MBHs in dwarf galaxies.

Published
2023
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5. The Event Horizon Telescope Image of the Quasar NRAO 530

Author

Svetlana Jorstad, Maciek Wielgus, Rocco Lico, Sara Issaoun, Avery E. Broderick, Dominic W. Pesce, Jun Liu, Guang-Yao Zhao, Thomas P. Krichbaum, Lindy Blackburn, Chi-kwan Chan, Michael Janssen, Venkatessh Ramakrishnan, Kazunori Akiyama, Antxon Alberdi, Juan Carlos Algaba, Katherine L. Bouman, Ilje Cho, Antonio Fuentes, José L. Gómez, Mark Gurwell, Michael D. Johnson, Jae-Young Kim, Ru-Sen Lu, Iván Martí-Vidal, Monika Moscibrodzka, Felix M. Pötzl, Efthalia Traianou, Ilse van Bemmel, Walter Alef, Richard Anantua, Keiichi Asada, Rebecca Azulay, Uwe Bach, Anne-Kathrin Baczko, David Ball, Mislav Baloković, John Barrett, Michi Bauböck, Bradford A. Benson, Dan Bintley, Raymond Blundell, Geoffrey C. Bower, Hope Boyce, Michael Bremer, Christiaan D. Brinkerink, Roger Brissenden, Silke Britzen, Dominique Broguiere, Thomas Bronzwaer, Sandra Bustamante, Do-Young Byun, John E. Carlstrom, Chiara Ceccobello, Andrew Chael, Koushik Chatterjee, Shami Chatterjee, Ming-Tang Chen, Yongjun Chen, Xiaopeng Cheng, Pierre Christian, Nicholas S. Conroy, John E. Conway, James M. Cordes, Thomas M. Crawford, Geoffrey B. Crew, Alejandro Cruz-Osorio, Yuzhu Cui, Jordy Davelaar, Mariafelicia De Laurentis, Roger Deane, Jessica Dempsey, Gregory Desvignes, Jason Dexter, Vedant Dhruv, Sheperd S. Doeleman, Sean Dougal, Sergio A. Dzib, Ralph P. Eatough, Razieh Emami, Heino Falcke, Joseph Farah, Vincent L. Fish, Ed Fomalont, H. Alyson Ford, Raquel Fraga-Encinas, William T. Freeman, Per Friberg, Christian M. Fromm, Peter Galison, Charles F. Gammie, Roberto García, Olivier Gentaz, Boris Georgiev, Ciriaco Goddi, Roman Gold, Arturo I. Gómez-Ruiz, Minfeng Gu, Kazuhiro Hada, Daryl Haggard, Kari Haworth, Michael H. Hecht, Ronald Hesper, Dirk Heumann, Luis C. Ho, Paul Ho, Mareki Honma, Chih-Wei L. Huang, Lei Huang, David H. Hughes, Shiro Ikeda, C. M. Violette Impellizzeri, Makoto Inoue, David J. James, Buell T. Jannuzi, Britton Jeter, Wu Jiang, Alejandra Jiménez-Rosales, Abhishek V. Joshi, Taehyun Jung, Mansour Karami, Ramesh Karuppusamy, Tomohisa Kawashima, Garrett K. Keating, Mark Kettenis, Dong-Jin Kim, Jongsoo Kim, Junhan Kim, Motoki Kino, Jun Yi Koay, Prashant Kocherlakota, Yutaro Kofuji, Shoko Koyama, Carsten Kramer, Michael Kramer, Cheng-Yu Kuo, Noemi La Bella, Tod R. Lauer, Daeyoung Lee, Sang-Sung Lee, Po Kin Leung, Aviad Levis, Zhiyuan Li, Greg Lindahl, Michael Lindqvist, Mikhail Lisakov, Kuo Liu, Elisabetta Liuzzo, Wen-Ping Lo, Andrei P. Lobanov, Laurent Loinard, Colin J. Lonsdale, Nicholas R. MacDonald, Jirong Mao, Nicola Marchili, Sera Markoff, Daniel P. Marrone, Alan P. Marscher, Satoki Matsushita, Lynn D. Matthews, Lia Medeiros, Karl M. Menten, Daniel Michalik, Izumi Mizuno, Yosuke Mizuno, James M. Moran, Kotaro Moriyama, Cornelia Müller, Alejandro Mus, Gibwa Musoke, Ioannis Myserlis, Andrew Nadolski, Hiroshi Nagai, Neil M. Nagar, Masanori Nakamura, Ramesh Narayan, Gopal Narayanan, Iniyan Natarajan, Antonios Nathanail, Santiago Navarro Fuentes, Joey Neilsen, Roberto Neri, Chunchong Ni, Aristeidis Noutsos, Michael A. Nowak, Junghwan Oh, Hiroki Okino, Héctor Olivares, Gisela N. Ortiz-León, Tomoaki Oyama, Feryal Özel, Daniel C. M. Palumbo, Georgios Filippos Paraschos, Jongho Park, Harriet Parsons, Nimesh Patel, Ue-Li Pen, Vincent Piétu, Richard Plambeck, Aleksandar PopStefanija, Oliver Porth, Ben Prather, Jorge A. Preciado-López, Dimitrios Psaltis, Hung-Yi Pu, Ramprasad Rao, Mark G. Rawlings, Alexander W. Raymond, Luciano Rezzolla, Angelo Ricarte, Bart Ripperda, Freek Roelofs, Alan Rogers, Eduardo Ros, Cristina Romero-Cañizales, Arash Roshanineshat, Helge Rottmann, Alan L. Roy, Ignacio Ruiz, Chet Ruszczyk, Kazi L. J. Rygl, Salvador Sánchez, David Sánchez-Argüelles, Miguel Sánchez-Portal, Mahito Sasada, Kaushik Satapathy, Tuomas Savolainen, F. Peter Schloerb, Jonathan Schonfeld, Karl-Friedrich Schuster, Lijing Shao, Zhiqiang Shen, Des Small, Bong Won Sohn, Jason SooHoo, Kamal Souccar, He Sun, Fumie Tazaki, Alexandra J. Tetarenko, Paul Tiede, Remo P. J. Tilanus, Michael Titus, Pablo Torne, Tyler Trent, Sascha Trippe, Matthew Turk, Huib Jan van Langevelde, Daniel R. van Rossum, Jesse Vos, Jan Wagner, Derek Ward-Thompson, John Wardle, Jonathan Weintroub, Norbert Wex, Robert Wharton, Kaj Wiik, Gunther Witzel, Michael F. Wondrak, George N. Wong, Qingwen Wu, Paul Yamaguchi, Doosoo Yoon, André Young, Ken Young, Ziri Younsi, Feng Yuan, Ye-Fei Yuan, J. Anton Zensus, Shuo Zhang, and Shan-Shan Zhao

Subjects
Extragalactic astronomy, Astrophysics, QB460-466
Abstract

We report on the observations of the quasar NRAO 530 with the Event Horizon Telescope (EHT) on 2017 April 5−7, when NRAO 530 was used as a calibrator for the EHT observations of Sagittarius A*. At z = 0.902, this is the most distant object imaged by the EHT so far. We reconstruct the first images of the source at 230 GHz, at an unprecedented angular resolution of ∼20 μ as, both in total intensity and in linear polarization (LP). We do not detect source variability, allowing us to represent the whole data set with static images. The images reveal a bright feature located on the southern end of the jet, which we associate with the core. The feature is linearly polarized, with a fractional polarization of ∼5%–8%, and it has a substructure consisting of two components. Their observed brightness temperature suggests that the energy density of the jet is dominated by the magnetic field. The jet extends over 60 μ as along a position angle ∼ −28°. It includes two features with orthogonal directions of polarization (electric vector position angle), parallel and perpendicular to the jet axis, consistent with a helical structure of the magnetic field in the jet. The outermost feature has a particularly high degree of LP, suggestive of a nearly uniform magnetic field. Future EHT observations will probe the variability of the jet structure on microarcsecond scales, while simultaneous multiwavelength monitoring will provide insight into the high-energy emission origin.

Published
2023
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6. Unraveling Twisty Linear Polarization Morphologies in Black Hole Images

Author

Razieh Emami, Angelo Ricarte, George N. Wong, Daniel Palumbo, Dominic Chang, Sheperd S. Doeleman, Avery E. Broderick, Ramesh Narayan, Maciek Wielgus, Lindy Blackburn, Ben S. Prather, Andrew A. Chael, Richard Anantua, Koushik Chatterjee, Ivan Marti-Vidal, Jose L. Gómez, Kazunori Akiyama, Matthew Liska, Lars Hernquist, Grant Tremblay, Mark Vogelsberger, Charles Alcock, Randall Smith, James Steiner, Paul Tiede, and Freek Roelofs

Subjects
Black hole physics, Event horizons, Plasma astrophysics, Magnetohydrodynamical simulations, Astrophysics, QB460-466
Abstract

We investigate general relativistic magnetohydrodynamic simulations to determine the physical origin of the twisty patterns of linear polarization seen in spatially resolved black hole images and explain their morphological dependence on black hole spin. By characterizing the observed emission with a simple analytic ring model, we find that the twisty morphology is determined by the magnetic field structure in the emitting region. Moreover, the dependence of this twisty pattern on spin can be attributed to changes in the magnetic field geometry that occur due to the frame dragging. By studying an analytic ring model, we find that the roles of Doppler boosting and lensing are subdominant. Faraday rotation may cause a systematic shift in the linear polarization pattern, but we find that its impact is subdominant for models with strong magnetic fields and modest ion-to-electron temperature ratios. Models with weaker magnetic fields are much more strongly affected by Faraday rotation and have more complicated emission geometries than can be captured by a ring model. However, these models are currently disfavoured by the recent EHT observations of M87*. Our results suggest that linear polarization maps can provide a probe of the underlying magnetic field structure around a black hole, which may then be usable to indirectly infer black hole spins. The generality of these results should be tested with alternative codes, initial conditions, and plasma physics prescriptions.

Published
2023
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7. The EB Correlation in Resolved Polarized Images: Connections to the Astrophysics of Black Holes

Author

Razieh Emami, Sheperd S. Doeleman, Maciek Wielgus, Dominic Chang, Koushik Chatterjee, Randall Smith, Matthew Liska, James F. Steiner, Angelo Ricarte, Ramesh Narayan, Grant Tremblay, Douglas Finkbeiner, Lars Hernquist, Chi-Kwan Chan, Lindy Blackburn, Ben S. Prather, Paul Tiede, Avery E. Broderick, Mark Vogelsberger, Charles Alcock, and Freek Roelofs

Subjects
Black hole physics, Event horizons, Supermassive black holes, Astrophysics, QB460-466
Abstract

We present an in-depth analysis of the newly proposed correlation function in visibility space, between the E and B modes of linear polarization, hereafter the EB correlation, for a set of time-averaged general relativistic magnetohydrodynamical simulations compared with the phase map from different semianalytic models and the Event Horizon Telescope (EHT) 2017 data for M87*. We demonstrate that the phase map of time-averaged EB correlation contains novel information that might be linked to black hole (BH) spin, accretion state, and electron temperature. A detailed comparison with a semianalytic approach with different azimuthal expansion modes shows that to recover the morphology of real/imaginary part of the correlation function and its phase, we require higher orders of azimuthal modes. To extract the phase features, we use Zernike polynomial reconstruction developing an empirical metric to break degeneracies between models with different BH spins that are qualitatively similar. We use a set of geometrical ring models with various magnetic and velocity field morphologies, showing that both the image space and visibility-based EB -correlation morphologies in magnetically arrested disk simulations can be explained with simple fluid and magnetic field geometries as used in ring models. Standard and normal evolutions by contrast are harder to model, demonstrating that the simple fluid and magnetic field geometries of ring models are not sufficient to describe them owing to higher Faraday rotation depths. A qualitative comparison with the EHT data demonstrates that some of the features in the phase of EB correlation might be well explained by the current models for BH spins and electron temperatures, while others require larger theoretical surveys.

Published
2023
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8. A Search for Pulsars around Sgr A* in the First Event Horizon Telescope Data Set

Author

Pablo Torne, Kuo Liu, Ralph P. Eatough, Jompoj Wongphechauxsorn, James M. Cordes, Gregory Desvignes, Mariafelicia De Laurentis, Michael Kramer, Scott M. Ransom, Shami Chatterjee, Robert Wharton, Ramesh Karuppusamy, Lindy Blackburn, Michael Janssen, Chi-kwan Chan, Geoffrey, B. Crew, Lynn D. Matthews, Ciriaco Goddi, Helge Rottmann, Jan Wagner, Salvador Sánchez, Ignacio Ruiz, Federico Abbate, Geoffrey C. Bower, Juan J. Salamanca, Arturo I. Gómez-Ruiz, Alfredo Herrera-Aguilar, Wu Jiang, Ru-Sen Lu, Ue-Li Pen, Alexander W. Raymond, Lijing Shao, Zhiqiang Shen, Gabriel Paubert, Miguel Sanchez-Portal, Carsten Kramer, Manuel Castillo, Santiago Navarro, David John, Karl-Friedrich Schuster, Michael D. Johnson, Kazi L. J. Rygl, Kazunori Akiyama, Antxon Alberdi, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Uwe Bach, Anne-Kathrin Baczko, David Ball, Mislav Baloković, John Barrett, Michi Bauböck, Bradford A. Benson, Dan Bintley, Raymond Blundell, Katherine L. Bouman, Hope Boyce, Michael Bremer, Christiaan D. Brinkerink, Roger Brissenden, Silke Britzen, Avery E. Broderick, Dominique Broguiere, Thomas Bronzwaer, Sandra Bustamante, Do-Young Byun, John E. Carlstrom, Chiara Ceccobello, Andrew Chael, Dominic O. Chang, Koushik Chatterjee, Ming-Tang Chen, Yongjun Chen, Xiaopeng Cheng, Ilje Cho, Pierre Christian, Nicholas S. Conroy, John E. Conway, Thomas M. Crawford, Alejandro Cruz-Osorio, Yuzhu Cui, Rohan Dahale, Jordy Davelaar, Roger Deane, Jessica Dempsey, Jason Dexter, Vedant Dhruv, Sheperd S. Doeleman, Sean Dougal, Sergio A. Dzib, Razieh Emami, Heino Falcke, Joseph Farah, Vincent L. Fish, Ed Fomalont, H. Alyson Ford, Marianna Foschi, Raquel Fraga-Encinas, William T. Freeman, Per Friberg, Christian M. Fromm, Antonio Fuentes, Peter Galison, Charles F. Gammie, Roberto García, Olivier Gentaz, Boris Georgiev, Roman Gold, José L. Gómez, Minfeng Gu, Mark Gurwell, Kazuhiro Hada, Daryl Haggard, Kari Haworth, Michael H. Hecht, Ronald Hesper, Dirk Heumann, Luis C. Ho, Paul Ho, Mareki Honma, Chih-Wei L. Huang, Lei Huang, David H. Hughes, Shiro Ikeda, C. M. Violette Impellizzeri, Makoto Inoue, Sara Issaoun, David J. James, Buell T. Jannuzi, Britton Jeter, Alejandra Jiménez-Rosales, Svetlana Jorstad, Abhishek V. Joshi, Taehyun Jung, Mansour Karami, Tomohisa Kawashima, Garrett K. Keating, Mark Kettenis, Dong-Jin Kim, Jae-Young Kim, Jongsoo Kim, Junhan Kim, Motoki Kino, Jun Yi Koay, Prashant Kocherlakota, Yutaro Kofuji, Shoko Koyama, Thomas P. Krichbaum, Cheng-Yu Kuo, Noemi La Bella, Tod R. Lauer, Daeyoung Lee, Sang-Sung Lee, Po Kin Leung, Aviad Levis, Zhiyuan Li, Rocco Lico, Greg Lindahl, Michael Lindqvist, Mikhail Lisakov, Jun Liu, Elisabetta Liuzzo, Wen-Ping Lo, Andrei P. Lobanov, Laurent Loinard, Colin J. Lonsdale, Nicholas R. MacDonald, Jirong Mao, Nicola Marchili, Sera Markoff, Daniel P. Marrone, Alan P. Marscher, Iván Martí-Vidal, Satoki Matsushita, Lia Medeiros, Karl M. Menten, Daniel Michalik, Izumi Mizuno, Yosuke Mizuno, James M. Moran, Kotaro Moriyama, Monika Moscibrodzka, Cornelia Müller, Hendrik Müller, Alejandro Mus, Gibwa Musoke, Ioannis Myserlis, Andrew Nadolski, Hiroshi Nagai, Neil M. Nagar, Masanori Nakamura, Ramesh Narayan, Gopal Narayanan, Iniyan Natarajan, Antonios Nathanail, Joey Neilsen, Roberto Neri, Chunchong Ni, Aristeidis Noutsos, Michael A. Nowak, Junghwan Oh, Hiroki Okino, Héctor Olivares, Gisela N. Ortiz-León, Tomoaki Oyama, Feryal Özel, Daniel C. M. Palumbo, Georgios Filippos Paraschos, Jongho Park, Harriet Parsons, Nimesh Patel, Dominic W. Pesce, Vincent Piétu, Richard Plambeck, Aleksandar PopStefanija, Oliver Porth, Felix M. Pötzl, Ben Prather, Jorge A. Preciado-López, Dimitrios Psaltis, Hung-Yi Pu, Venkatessh Ramakrishnan, Ramprasad Rao, Mark G. Rawlings, Luciano Rezzolla, Angelo Ricarte, Bart Ripperda, Freek Roelofs, Alan Rogers, Eduardo Ros, Cristina Romero-Cañizales, Arash Roshanineshat, Alan L. Roy, Chet Ruszczyk, David Sánchez-Argüelles, Mahito Sasada, Kaushik Satapathy, Tuomas Savolainen, F. Peter Schloerb, Jonathan Schonfeld, Des Small, Bong Won Sohn, Jason SooHoo, Kamal Souccar, He Sun, Alexandra J. Tetarenko, Paul Tiede, Remo P. J. Tilanus, Michael Titus, Teresa Toscano, Efthalia Traianou, Tyler Trent, Sascha Trippe, Matthew Turk, Ilse van Bemmel, Huib Jan van Langevelde, Daniel R. van Rossum, Jesse Vos, Derek Ward-Thompson, John Wardle, Jonathan Weintroub, Norbert Wex, Maciek Wielgus, Kaj Wiik, Gunther Witzel, Michael F. Wondrak, George N. Wong, Qingwen Wu, Nitika Yadlapalli, Paul Yamaguchi, Aristomenis Yfantis, Doosoo Yoon, André Young, Ken Young, Ziri Younsi, Wei Yu, Feng Yuan, Ye-Fei Yuan, J. Anton Zensus, Shuo Zhang, Guang-Yao Zhao, and Shan-Shan Zhao

Subjects
Radio pulsars, Pulsars, Magnetars, Neutron stars, Black hole physics, Period search, Astrophysics, QB460-466
Abstract

In 2017 the Event Horizon Telescope (EHT) observed the supermassive black hole at the center of the Milky Way, Sagittarius A* (Sgr A*), at a frequency of 228.1 GHz ( λ = 1.3 mm). The fundamental physics tests that even a single pulsar orbiting Sgr A* would enable motivate searching for pulsars in EHT data sets. The high observing frequency means that pulsars—which typically exhibit steep emission spectra—are expected to be very faint. However, it also negates pulse scattering, an effect that could hinder pulsar detections in the Galactic center. Additionally, magnetars or a secondary inverse Compton emission could be stronger at millimeter wavelengths than at lower frequencies. We present a search for pulsars close to Sgr A* using the data from the three most sensitive stations in the EHT 2017 campaign: the Atacama Large Millimeter/submillimeter Array, the Large Millimeter Telescope, and the IRAM 30 m Telescope. We apply three detection methods based on Fourier-domain analysis, the fast folding algorithm, and single-pulse searches targeting both pulsars and burst-like transient emission. We use the simultaneity of the observations to confirm potential candidates. No new pulsars or significant bursts were found. Being the first pulsar search ever carried out at such high radio frequencies, we detail our analysis methods and give a detailed estimation of the sensitivity of the search. We conclude that the EHT 2017 observations are only sensitive to a small fraction (≲2.2%) of the pulsars that may exist close to Sgr A*, motivating further searches for fainter pulsars in the region.

Published
2023
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9. A Search for Pulsars around Sgr A* in the First Event Horizon Telescope Data Set

Author

Torne, Pablo, primary, Liu, Kuo, additional, Eatough, Ralph P., additional, Wongphechauxsorn, Jompoj, additional, Cordes, James M., additional, Desvignes, Gregory, additional, De Laurentis, Mariafelicia, additional, Kramer, Michael, additional, Ransom, Scott M., additional, Chatterjee, Shami, additional, Wharton, Robert, additional, Karuppusamy, Ramesh, additional, Blackburn, Lindy, additional, Janssen, Michael, additional, Chan, Chi-kwan, additional, Crew, Geoffrey, B., additional, Matthews, Lynn D., additional, Goddi, Ciriaco, additional, Rottmann, Helge, additional, Wagner, Jan, additional, Sánchez, Salvador, additional, Ruiz, Ignacio, additional, Abbate, Federico, additional, Bower, Geoffrey C., additional, Salamanca, Juan J., additional, Gómez-Ruiz, Arturo I., additional, Herrera-Aguilar, Alfredo, additional, Jiang 江, Wu 悟, additional, Lu 路, Ru-Sen 如森, additional, Pen, Ue-Li, additional, Raymond, Alexander W., additional, Shao, Lijing, additional, Shen 沈, Zhiqiang 志强, additional, Paubert, Gabriel, additional, Sanchez-Portal, Miguel, additional, Kramer, Carsten, additional, Castillo, Manuel, additional, Navarro, Santiago, additional, John, David, additional, Schuster, Karl-Friedrich, additional, Johnson, Michael D., additional, Rygl, Kazi L. J., additional, Akiyama, Kazunori, additional, Alberdi, Antxon, additional, Alef, Walter, additional, Algaba, Juan Carlos, additional, Anantua, Richard, additional, Asada, Keiichi, additional, Azulay, Rebecca, additional, Bach, Uwe, additional, Baczko, Anne-Kathrin, additional, Ball, David, additional, Baloković, Mislav, additional, Barrett, John, additional, Bauböck, Michi, additional, Benson, Bradford A., additional, Bintley, Dan, additional, Blundell, Raymond, additional, Bouman, Katherine L., additional, Boyce, Hope, additional, Bremer, Michael, additional, Brinkerink, Christiaan D., additional, Brissenden, Roger, additional, Britzen, Silke, additional, Broderick, Avery E., additional, Broguiere, Dominique, additional, Bronzwaer, Thomas, additional, Bustamante, Sandra, additional, Byun, Do-Young, additional, Carlstrom, John E., additional, Ceccobello, Chiara, additional, Chael, Andrew, additional, Chang, Dominic O., additional, Chatterjee, Koushik, additional, Chen, Ming-Tang, additional, Chen 陈, Yongjun 永军, additional, Cheng, Xiaopeng, additional, Cho, Ilje, additional, Christian, Pierre, additional, Conroy, Nicholas S., additional, Conway, John E., additional, Crawford, Thomas M., additional, Cruz-Osorio, Alejandro, additional, Cui 崔, Yuzhu 玉竹, additional, Dahale, Rohan, additional, Davelaar, Jordy, additional, Deane, Roger, additional, Dempsey, Jessica, additional, Dexter, Jason, additional, Dhruv, Vedant, additional, Doeleman, Sheperd S., additional, Dougal, Sean, additional, Dzib, Sergio A., additional, Emami, Razieh, additional, Falcke, Heino, additional, Farah, Joseph, additional, Fish, Vincent L., additional, Fomalont, Ed, additional, Ford, H. Alyson, additional, Foschi, Marianna, additional, Fraga-Encinas, Raquel, additional, Freeman, William T., additional, Friberg, Per, additional, Fromm, Christian M., additional, Fuentes, Antonio, additional, Galison, Peter, additional, Gammie, Charles F., additional, García, Roberto, additional, Gentaz, Olivier, additional, Georgiev, Boris, additional, Gold, Roman, additional, Gómez, José L., additional, Gu 顾, Minfeng 敏峰, additional, Gurwell, Mark, additional, Hada, Kazuhiro, additional, Haggard, Daryl, additional, Haworth, Kari, additional, Hecht, Michael H., additional, Hesper, Ronald, additional, Heumann, Dirk, additional, Ho 何, Luis C. 子山, additional, Ho, Paul, additional, Honma, Mareki, additional, Huang, Chih-Wei L., additional, Huang 黄, Lei 磊, additional, Hughes, David H., additional, Ikeda, Shiro, additional, Impellizzeri, C. M. Violette, additional, Inoue, Makoto, additional, Issaoun, Sara, additional, James, David J., additional, Jannuzi, Buell T., additional, Jeter, Britton, additional, Jiménez-Rosales, Alejandra, additional, Jorstad, Svetlana, additional, Joshi, Abhishek V., additional, Jung, Taehyun, additional, Karami, Mansour, additional, Kawashima, Tomohisa, additional, Keating, Garrett K., additional, Kettenis, Mark, additional, Kim, Dong-Jin, additional, Kim, Jae-Young, additional, Kim, Jongsoo, additional, Kim, Junhan, additional, Kino, Motoki, additional, Koay, Jun Yi, additional, Kocherlakota, Prashant, additional, Kofuji, Yutaro, additional, Koyama, Shoko, additional, Krichbaum, Thomas P., additional, Kuo, Cheng-Yu, additional, La Bella, Noemi, additional, Lauer, Tod R., additional, Lee, Daeyoung, additional, Lee, Sang-Sung, additional, Leung, Po Kin, additional, Levis, Aviad, additional, Li 李, Zhiyuan 志远, additional, Lico, Rocco, additional, Lindahl, Greg, additional, Lindqvist, Michael, additional, Lisakov, Mikhail, additional, Liu 刘, Jun 俊, additional, Liuzzo, Elisabetta, additional, Lo, Wen-Ping, additional, Lobanov, Andrei P., additional, Loinard, Laurent, additional, Lonsdale, Colin J., additional, MacDonald, Nicholas R., additional, Mao 毛, Jirong 基荣, additional, Marchili, Nicola, additional, Markoff, Sera, additional, Marrone, Daniel P., additional, Marscher, Alan P., additional, Martí-Vidal, Iván, additional, Matsushita, Satoki, additional, Medeiros, Lia, additional, Menten, Karl M., additional, Michalik, Daniel, additional, Mizuno, Izumi, additional, Mizuno, Yosuke, additional, Moran, James M., additional, Moriyama, Kotaro, additional, Moscibrodzka, Monika, additional, Müller, Cornelia, additional, Müller, Hendrik, additional, Mus, Alejandro, additional, Musoke, Gibwa, additional, Myserlis, Ioannis, additional, Nadolski, Andrew, additional, Nagai, Hiroshi, additional, Nagar, Neil M., additional, Nakamura, Masanori, additional, Narayan, Ramesh, additional, Narayanan, Gopal, additional, Natarajan, Iniyan, additional, Nathanail, Antonios, additional, Neilsen, Joey, additional, Neri, Roberto, additional, Ni, Chunchong, additional, Noutsos, Aristeidis, additional, Nowak, Michael A., additional, Oh, Junghwan, additional, Okino, Hiroki, additional, Olivares, Héctor, additional, Ortiz-León, Gisela N., additional, Oyama, Tomoaki, additional, Özel, Feryal, additional, Palumbo, Daniel C. M., additional, Paraschos, Georgios Filippos, additional, Park, Jongho, additional, Parsons, Harriet, additional, Patel, Nimesh, additional, Pesce, Dominic W., additional, Piétu, Vincent, additional, Plambeck, Richard, additional, PopStefanija, Aleksandar, additional, Porth, Oliver, additional, Pötzl, Felix M., additional, Prather, Ben, additional, Preciado-López, Jorge A., additional, Psaltis, Dimitrios, additional, Pu, Hung-Yi, additional, Ramakrishnan, Venkatessh, additional, Rao, Ramprasad, additional, Rawlings, Mark G., additional, Rezzolla, Luciano, additional, Ricarte, Angelo, additional, Ripperda, Bart, additional, Roelofs, Freek, additional, Rogers, Alan, additional, Ros, Eduardo, additional, Romero-Cañizales, Cristina, additional, Roshanineshat, Arash, additional, Roy, Alan L., additional, Ruszczyk, Chet, additional, Sánchez-Argüelles, David, additional, Sasada, Mahito, additional, Satapathy, Kaushik, additional, Savolainen, Tuomas, additional, Schloerb, F. Peter, additional, Schonfeld, Jonathan, additional, Small, Des, additional, Sohn, Bong Won, additional, SooHoo, Jason, additional, Souccar, Kamal, additional, Sun 孙, He 赫, additional, Tetarenko, Alexandra J., additional, Tiede, Paul, additional, Tilanus, Remo P. J., additional, Titus, Michael, additional, Toscano, Teresa, additional, Traianou, Efthalia, additional, Trent, Tyler, additional, Trippe, Sascha, additional, Turk, Matthew, additional, van Bemmel, Ilse, additional, van Langevelde, Huib Jan, additional, van Rossum, Daniel R., additional, Vos, Jesse, additional, Ward-Thompson, Derek, additional, Wardle, John, additional, Weintroub, Jonathan, additional, Wex, Norbert, additional, Wielgus, Maciek, additional, Wiik, Kaj, additional, Witzel, Gunther, additional, Wondrak, Michael F., additional, Wong, George N., additional, Wu 吴, Qingwen 庆文, additional, Yadlapalli, Nitika, additional, Yamaguchi, Paul, additional, Yfantis, Aristomenis, additional, Yoon, Doosoo, additional, Young, André, additional, Young, Ken, additional, Younsi, Ziri, additional, Yu 于, Wei 威, additional, Yuan 袁, Feng 峰, additional, Yuan 袁, Ye-Fei 业飞, additional, Zensus, J. Anton, additional, Zhang, Shuo, additional, Zhao, Guang-Yao, additional, and Zhao 赵, Shan-Shan 杉杉, additional

Published
2023
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10. The EB Correlation in Resolved Polarized Images: Connections to the Astrophysics of Black Holes

Author

Emami, Razieh, primary, Doeleman, Sheperd S., additional, Wielgus, Maciek, additional, Chang, Dominic, additional, Chatterjee, Koushik, additional, Smith, Randall, additional, Liska, Matthew, additional, Steiner, James F., additional, Ricarte, Angelo, additional, Narayan, Ramesh, additional, Tremblay, Grant, additional, Finkbeiner, Douglas, additional, Hernquist, Lars, additional, Chan, Chi-Kwan, additional, Blackburn, Lindy, additional, Prather, Ben S., additional, Tiede, Paul, additional, Broderick, Avery E., additional, Vogelsberger, Mark, additional, Alcock, Charles, additional, and Roelofs, Freek, additional

Published
2023
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11. Comparison of Polarized Radiative Transfer Codes Used by the EHT Collaboration

Author

Prather, Ben S., primary, Dexter, Jason, additional, Moscibrodzka, Monika, additional, Pu, Hung-Yi, additional, Bronzwaer, Thomas, additional, Davelaar, Jordy, additional, Younsi, Ziri, additional, Gammie, Charles F., additional, Gold, Roman, additional, Wong, George N., additional, Akiyama, Kazunori, additional, Alberdi, Antxon, additional, Alef, Walter, additional, Algaba, Juan Carlos, additional, Anantua, Richard, additional, Asada, Keiichi, additional, Azulay, Rebecca, additional, Bach, Uwe, additional, Baczko, Anne-Kathrin, additional, Ball, David, additional, Baloković, Mislav, additional, Barrett, John, additional, Bauböck, Michi, additional, Benson, Bradford A., additional, Bintley, Dan, additional, Blackburn, Lindy, additional, Blundell, Raymond, additional, Bouman, Katherine L., additional, Bower, Geoffrey C., additional, Boyce, Hope, additional, Bremer, Michael, additional, Brinkerink, Christiaan D., additional, Brissenden, Roger, additional, Britzen, Silke, additional, Broderick, Avery E., additional, Broguiere, Dominique, additional, Bustamante, Sandra, additional, Byun, Do-Young, additional, Carlstrom, John E., additional, Ceccobello, Chiara, additional, Chael, Andrew, additional, Chan, Chi-kwan, additional, Chang, Dominic O., additional, Chatterjee, Koushik, additional, Chatterjee, Shami, additional, Chen, Ming-Tang, additional, Chen, Yongjun, additional, Cheng, Xiaopeng, additional, Cho, Ilje, additional, Christian, Pierre, additional, Conroy, Nicholas S., additional, Conway, John E., additional, Cordes, James M., additional, Crawford, Thomas M., additional, Crew, Geoffrey B., additional, Cruz-Osorio, Alejandro, additional, Cui, Yuzhu, additional, De Laurentis, Mariafelicia, additional, Deane, Roger, additional, Dempsey, Jessica, additional, Desvignes, Gregory, additional, Dhruv, Vedant, additional, Doeleman, Sheperd S., additional, Dougal, Sean, additional, Dzib, Sergio A., additional, Eatough, Ralph P., additional, Emami, Razieh, additional, Falcke, Heino, additional, Farah, Joseph, additional, Fish, Vincent L., additional, Fomalont, Ed, additional, Ford, H. Alyson, additional, Fraga-Encinas, Raquel, additional, Freeman, William T., additional, Friberg, Per, additional, Fromm, Christian M., additional, Fuentes, Antonio, additional, Galison, Peter, additional, García, Roberto, additional, Gentaz, Olivier, additional, Georgiev, Boris, additional, Goddi, Ciriaco, additional, Gómez-Ruiz, Arturo I., additional, Gómez, José L., additional, Gu, Minfeng, additional, Gurwell, Mark, additional, Hada, Kazuhiro, additional, Haggard, Daryl, additional, Haworth, Kari, additional, Hecht, Michael H., additional, Hesper, Ronald, additional, Heumann, Dirk, additional, Ho, Luis C., additional, Ho, Paul, additional, Honma, Mareki, additional, Huang, Chih-Wei L., additional, Huang, Lei, additional, Hughes, David H., additional, Ikeda, Shiro, additional, Impellizzeri, C. M. Violette, additional, Inoue, Makoto, additional, Issaoun, Sara, additional, James, David J., additional, Jannuzi, Buell T., additional, Janssen, Michael, additional, Jeter, Britton, additional, Jiang, Wu, additional, Jiménez-Rosales, Alejandra, additional, Johnson, Michael D., additional, Jorstad, Svetlana, additional, Joshi, Abhishek V., additional, Jung, Taehyun, additional, Karami, Mansour, additional, Karuppusamy, Ramesh, additional, Kawashima, Tomohisa, additional, Keating, Garrett K., additional, Kettenis, Mark, additional, Kim, Dong-Jin, additional, Kim, Jae-Young, additional, Kim, Jongsoo, additional, Kim, Junhan, additional, Kino, Motoki, additional, Koay, Jun Yi, additional, Kocherlakota, Prashant, additional, Kofuji, Yutaro, additional, Koyama, Shoko, additional, Kramer, Carsten, additional, Kramer, Michael, additional, Krichbaum, Thomas P., additional, Kuo, Cheng-Yu, additional, La Bella, Noemi, additional, Lauer, Tod R., additional, Lee, Daeyoung, additional, Lee, Sang-Sung, additional, Leung, Po Kin, additional, Levis, Aviad, additional, Li, Zhiyuan, additional, Lico, Rocco, additional, Lindahl, Greg, additional, Lindqvist, Michael, additional, Lisakov, Mikhail, additional, Liu, Jun, additional, Liu, Kuo, additional, Liuzzo, Elisabetta, additional, Lo, Wen-Ping, additional, Lobanov, Andrei P., additional, Loinard, Laurent, additional, Lonsdale, Colin J., additional, Lu, Ru-Sen, additional, MacDonald, Nicholas R., additional, Mao, Jirong, additional, Marchili, Nicola, additional, Markoff, Sera, additional, Marrone, Daniel P., additional, Marscher, Alan P., additional, Martí-Vidal, Iván, additional, Matsushita, Satoki, additional, Matthews, Lynn D., additional, Medeiros, Lia, additional, Menten, Karl M., additional, Michalik, Daniel, additional, Mizuno, Izumi, additional, Mizuno, Yosuke, additional, Moran, James M., additional, Moriyama, Kotaro, additional, Müller, Cornelia, additional, Mus, Alejandro, additional, Musoke, Gibwa, additional, Myserlis, Ioannis, additional, Nadolski, Andrew, additional, Nagai, Hiroshi, additional, Nagar, Neil M., additional, Nakamura, Masanori, additional, Narayan, Ramesh, additional, Narayanan, Gopal, additional, Natarajan, Iniyan, additional, Nathanail, Antonios, additional, Fuentes, Santiago Navarro, additional, Neilsen, Joey, additional, Neri, Roberto, additional, Ni, Chunchong, additional, Noutsos, Aristeidis, additional, Nowak, Michael A., additional, Oh, Junghwan, additional, Okino, Hiroki, additional, Olivares, Héctor, additional, Ortiz-León, Gisela N., additional, Oyama, Tomoaki, additional, Özel, Feryal, additional, Palumbo, Daniel C. M., additional, Paraschos, Georgios Filippos, additional, Park, Jongho, additional, Parsons, Harriet, additional, Patel, Nimesh, additional, Pen, Ue-Li, additional, Pesce, Dominic W., additional, Piétu, Vincent, additional, Plambeck, Richard, additional, PopStefanija, Aleksandar, additional, Porth, Oliver, additional, Pötzl, Felix M., additional, Preciado-López, Jorge A., additional, Psaltis, Dimitrios, additional, Ramakrishnan, Venkatessh, additional, Rao, Ramprasad, additional, Rawlings, Mark G., additional, Raymond, Alexander W., additional, Rezzolla, Luciano, additional, Ricarte, Angelo, additional, Ripperda, Bart, additional, Roelofs, Freek, additional, Rogers, Alan, additional, Ros, Eduardo, additional, Romero-Cañizales, Cristina, additional, Roshanineshat, Arash, additional, Rottmann, Helge, additional, Roy, Alan L., additional, Ruiz, Ignacio, additional, Ruszczyk, Chet, additional, Rygl, Kazi L. J., additional, Sánchez, Salvador, additional, Sánchez-Argüelles, David, additional, Sánchez-Portal, Miguel, additional, Sasada, Mahito, additional, Satapathy, Kaushik, additional, Savolainen, Tuomas, additional, Schloerb, F. Peter, additional, Schonfeld, Jonathan, additional, Schuster, Karl-Friedrich, additional, Shao, Lijing, additional, Shen, Zhiqiang, additional, Small, Des, additional, Sohn, Bong Won, additional, SooHoo, Jason, additional, Souccar, Kamal, additional, Sun, He, additional, Tazaki, Fumie, additional, Tetarenko, Alexandra J., additional, Tiede, Paul, additional, Tilanus, Remo P. J., additional, Titus, Michael, additional, Torne, Pablo, additional, Traianou, Efthalia, additional, Trent, Tyler, additional, Trippe, Sascha, additional, Turk, Matthew, additional, van Bemmel, Ilse, additional, van Langevelde, Huib Jan, additional, van Rossum, Daniel R., additional, Vos, Jesse, additional, Wagner, Jan, additional, Ward-Thompson, Derek, additional, Wardle, John, additional, Weintroub, Jonathan, additional, Wex, Norbert, additional, Wharton, Robert, additional, Wielgus, Maciek, additional, Wiik, Kaj, additional, Witzel, Gunther, additional, Wondrak, Michael F., additional, Wu, Qingwen, additional, Yamaguchi, Paul, additional, Yfantis, Aristomenis, additional, Yoon, Doosoo, additional, Young, André, additional, Young, Ken, additional, Yu, Wei, additional, Yuan, Feng, additional, Yuan, Ye-Fei, additional, Zensus, J. Anton, additional, Zhang, Shuo, additional, Zhao, Guang-Yao, additional, and Zhao, Shan-Shan, additional

Published
2023
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12. Unraveling Twisty Linear Polarization Morphologies in Black Hole Images

Author

Emami, Razieh, primary, Ricarte, Angelo, additional, Wong, George N., additional, Palumbo, Daniel, additional, Chang, Dominic, additional, Doeleman, Sheperd S., additional, Broderick, Avery E., additional, Narayan, Ramesh, additional, Wielgus, Maciek, additional, Blackburn, Lindy, additional, Prather, Ben S., additional, Chael, Andrew A., additional, Anantua, Richard, additional, Chatterjee, Koushik, additional, Marti-Vidal, Ivan, additional, Gómez, Jose L., additional, Akiyama, Kazunori, additional, Liska, Matthew, additional, Hernquist, Lars, additional, Tremblay, Grant, additional, Vogelsberger, Mark, additional, Alcock, Charles, additional, Smith, Randall, additional, Steiner, James, additional, Tiede, Paul, additional, and Roelofs, Freek, additional

Published
2023
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15. The Event Horizon Telescope Image of the Quasar NRAO 530

Author

Jorstad, Svetlana, primary, Wielgus, Maciek, additional, Lico, Rocco, additional, Issaoun, Sara, additional, Broderick, Avery E., additional, Pesce, Dominic W., additional, Liu, Jun, additional, Zhao, Guang-Yao, additional, Krichbaum, Thomas P., additional, Blackburn, Lindy, additional, Chan, Chi-kwan, additional, Janssen, Michael, additional, Ramakrishnan, Venkatessh, additional, Akiyama, Kazunori, additional, Alberdi, Antxon, additional, Algaba, Juan Carlos, additional, Bouman, Katherine L., additional, Cho, Ilje, additional, Fuentes, Antonio, additional, Gómez, José L., additional, Gurwell, Mark, additional, Johnson, Michael D., additional, Kim, Jae-Young, additional, Lu, Ru-Sen, additional, Martí-Vidal, Iván, additional, Moscibrodzka, Monika, additional, Pötzl, Felix M., additional, Traianou, Efthalia, additional, van Bemmel, Ilse, additional, Alef, Walter, additional, Anantua, Richard, additional, Asada, Keiichi, additional, Azulay, Rebecca, additional, Bach, Uwe, additional, Baczko, Anne-Kathrin, additional, Ball, David, additional, Baloković, Mislav, additional, Barrett, John, additional, Bauböck, Michi, additional, Benson, Bradford A., additional, Bintley, Dan, additional, Blundell, Raymond, additional, Bower, Geoffrey C., additional, Boyce, Hope, additional, Bremer, Michael, additional, Brinkerink, Christiaan D., additional, Brissenden, Roger, additional, Britzen, Silke, additional, Broguiere, Dominique, additional, Bronzwaer, Thomas, additional, Bustamante, Sandra, additional, Byun, Do-Young, additional, Carlstrom, John E., additional, Ceccobello, Chiara, additional, Chael, Andrew, additional, Chatterjee, Koushik, additional, Chatterjee, Shami, additional, Chen, Ming-Tang, additional, Chen, Yongjun, additional, Cheng, Xiaopeng, additional, Christian, Pierre, additional, Conroy, Nicholas S., additional, Conway, John E., additional, Cordes, James M., additional, Crawford, Thomas M., additional, Crew, Geoffrey B., additional, Cruz-Osorio, Alejandro, additional, Cui, Yuzhu, additional, Davelaar, Jordy, additional, De Laurentis, Mariafelicia, additional, Deane, Roger, additional, Dempsey, Jessica, additional, Desvignes, Gregory, additional, Dexter, Jason, additional, Dhruv, Vedant, additional, Doeleman, Sheperd S., additional, Dougal, Sean, additional, Dzib, Sergio A., additional, Eatough, Ralph P., additional, Emami, Razieh, additional, Falcke, Heino, additional, Farah, Joseph, additional, Fish, Vincent L., additional, Fomalont, Ed, additional, Ford, H. Alyson, additional, Fraga-Encinas, Raquel, additional, Freeman, William T., additional, Friberg, Per, additional, Fromm, Christian M., additional, Galison, Peter, additional, Gammie, Charles F., additional, García, Roberto, additional, Gentaz, Olivier, additional, Georgiev, Boris, additional, Goddi, Ciriaco, additional, Gold, Roman, additional, Gómez-Ruiz, Arturo I., additional, Gu, Minfeng, additional, Hada, Kazuhiro, additional, Haggard, Daryl, additional, Haworth, Kari, additional, Hecht, Michael H., additional, Hesper, Ronald, additional, Heumann, Dirk, additional, Ho, Luis C., additional, Ho, Paul, additional, Honma, Mareki, additional, Huang, Chih-Wei L., additional, Huang, Lei, additional, Hughes, David H., additional, Ikeda, Shiro, additional, Impellizzeri, C. M. Violette, additional, Inoue, Makoto, additional, James, David J., additional, Jannuzi, Buell T., additional, Jeter, Britton, additional, Jiang, Wu, additional, Jiménez-Rosales, Alejandra, additional, Joshi, Abhishek V., additional, Jung, Taehyun, additional, Karami, Mansour, additional, Karuppusamy, Ramesh, additional, Kawashima, Tomohisa, additional, Keating, Garrett K., additional, Kettenis, Mark, additional, Kim, Dong-Jin, additional, Kim, Jongsoo, additional, Kim, Junhan, additional, Kino, Motoki, additional, Koay, Jun Yi, additional, Kocherlakota, Prashant, additional, Kofuji, Yutaro, additional, Koyama, Shoko, additional, Kramer, Carsten, additional, Kramer, Michael, additional, Kuo, Cheng-Yu, additional, La Bella, Noemi, additional, Lauer, Tod R., additional, Lee, Daeyoung, additional, Lee, Sang-Sung, additional, Leung, Po Kin, additional, Levis, Aviad, additional, Li, Zhiyuan, additional, Lindahl, Greg, additional, Lindqvist, Michael, additional, Lisakov, Mikhail, additional, Liu, Kuo, additional, Liuzzo, Elisabetta, additional, Lo, Wen-Ping, additional, Lobanov, Andrei P., additional, Loinard, Laurent, additional, Lonsdale, Colin J., additional, MacDonald, Nicholas R., additional, Mao, Jirong, additional, Marchili, Nicola, additional, Markoff, Sera, additional, Marrone, Daniel P., additional, Marscher, Alan P., additional, Matsushita, Satoki, additional, Matthews, Lynn D., additional, Medeiros, Lia, additional, Menten, Karl M., additional, Michalik, Daniel, additional, Mizuno, Izumi, additional, Mizuno, Yosuke, additional, Moran, James M., additional, Moriyama, Kotaro, additional, Müller, Cornelia, additional, Mus, Alejandro, additional, Musoke, Gibwa, additional, Myserlis, Ioannis, additional, Nadolski, Andrew, additional, Nagai, Hiroshi, additional, Nagar, Neil M., additional, Nakamura, Masanori, additional, Narayan, Ramesh, additional, Narayanan, Gopal, additional, Natarajan, Iniyan, additional, Nathanail, Antonios, additional, Fuentes, Santiago Navarro, additional, Neilsen, Joey, additional, Neri, Roberto, additional, Ni, Chunchong, additional, Noutsos, Aristeidis, additional, Nowak, Michael A., additional, Oh, Junghwan, additional, Okino, Hiroki, additional, Olivares, Héctor, additional, Ortiz-León, Gisela N., additional, Oyama, Tomoaki, additional, Özel, Feryal, additional, Palumbo, Daniel C. M., additional, Paraschos, Georgios Filippos, additional, Park, Jongho, additional, Parsons, Harriet, additional, Patel, Nimesh, additional, Pen, Ue-Li, additional, Piétu, Vincent, additional, Plambeck, Richard, additional, PopStefanija, Aleksandar, additional, Porth, Oliver, additional, Prather, Ben, additional, Preciado-López, Jorge A., additional, Psaltis, Dimitrios, additional, Pu, Hung-Yi, additional, Rao, Ramprasad, additional, Rawlings, Mark G., additional, Raymond, Alexander W., additional, Rezzolla, Luciano, additional, Ricarte, Angelo, additional, Ripperda, Bart, additional, Roelofs, Freek, additional, Rogers, Alan, additional, Ros, Eduardo, additional, Romero-Cañizales, Cristina, additional, Roshanineshat, Arash, additional, Rottmann, Helge, additional, Roy, Alan L., additional, Ruiz, Ignacio, additional, Ruszczyk, Chet, additional, Rygl, Kazi L. J., additional, Sánchez, Salvador, additional, Sánchez-Argüelles, David, additional, Sánchez-Portal, Miguel, additional, Sasada, Mahito, additional, Satapathy, Kaushik, additional, Savolainen, Tuomas, additional, Schloerb, F. Peter, additional, Schonfeld, Jonathan, additional, Schuster, Karl-Friedrich, additional, Shao, Lijing, additional, Shen, Zhiqiang, additional, Small, Des, additional, Sohn, Bong Won, additional, SooHoo, Jason, additional, Souccar, Kamal, additional, Sun, He, additional, Tazaki, Fumie, additional, Tetarenko, Alexandra J., additional, Tiede, Paul, additional, Tilanus, Remo P. J., additional, Titus, Michael, additional, Torne, Pablo, additional, Trent, Tyler, additional, Trippe, Sascha, additional, Turk, Matthew, additional, van Langevelde, Huib Jan, additional, van Rossum, Daniel R., additional, Vos, Jesse, additional, Wagner, Jan, additional, Ward-Thompson, Derek, additional, Wardle, John, additional, Weintroub, Jonathan, additional, Wex, Norbert, additional, Wharton, Robert, additional, Wiik, Kaj, additional, Witzel, Gunther, additional, Wondrak, Michael F., additional, Wong, George N., additional, Wu, Qingwen, additional, Yamaguchi, Paul, additional, Yoon, Doosoo, additional, Young, André, additional, Young, Ken, additional, Younsi, Ziri, additional, Yuan, Feng, additional, Yuan, Ye-Fei, additional, Zensus, J. Anton, additional, Zhang, Shuo, additional, and Zhao, Shan-Shan, additional

Published
2023
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17. The Photon Ring in M87*

Author

Broderick, Avery E., primary, Pesce, Dominic W., additional, Gold, Roman, additional, Tiede, Paul, additional, Pu, Hung-Yi, additional, Anantua, Richard, additional, Britzen, Silke, additional, Ceccobello, Chiara, additional, Chatterjee, Koushik, additional, Chen, Yongjun, additional, Conroy, Nicholas S., additional, Crew, Geoffrey B., additional, Cruz-Osorio, Alejandro, additional, Cui, Yuzhu, additional, Doeleman, Sheperd S., additional, Emami, Razieh, additional, Farah, Joseph, additional, Fromm, Christian M., additional, Galison, Peter, additional, Georgiev, Boris, additional, Ho, Luis C., additional, James, David J., additional, Jeter, Britton, additional, Jimenez-Rosales, Alejandra, additional, Koay, Jun Yi, additional, Kramer, Carsten, additional, Krichbaum, Thomas P., additional, Lee, Sang-Sung, additional, Lindqvist, Michael, additional, Martí-Vidal, Iván, additional, Menten, Karl M., additional, Mizuno, Yosuke, additional, Moran, James M., additional, Moscibrodzka, Monika, additional, Nathanail, Antonios, additional, Neilsen, Joey, additional, Ni, Chunchong, additional, Park, Jongho, additional, Piétu, Vincent, additional, Rezzolla, Luciano, additional, Ricarte, Angelo, additional, Ripperda, Bart, additional, Shao, Lijing, additional, Tazaki, Fumie, additional, Toma, Kenji, additional, Torne, Pablo, additional, Weintroub, Jonathan, additional, Wielgus, Maciek, additional, Yuan, Feng, additional, Zhao, Shan-Shan, additional, and Zhang, Shuo, additional

Published
2022
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18. Resolving the Inner Parsec of the Blazar J1924–2914 with the Event Horizon Telescope

Author

Issaoun, Sara, primary, Wielgus, Maciek, additional, Jorstad, Svetlana, additional, Krichbaum, Thomas P., additional, Blackburn, Lindy, additional, Janssen, Michael, additional, Chan, Chi-kwan, additional, Pesce, Dominic W., additional, Gómez, José L., additional, Akiyama, Kazunori, additional, Mościbrodzka, Monika, additional, Martí-Vidal, Iván, additional, Chael, Andrew, additional, Lico, Rocco, additional, Liu, Jun, additional, Ramakrishnan, Venkatessh, additional, Lisakov, Mikhail, additional, Fuentes, Antonio, additional, Zhao, Guang-Yao, additional, Moriyama, Kotaro, additional, Broderick, Avery E., additional, Tiede, Paul, additional, MacDonald, Nicholas R., additional, Mizuno, Yosuke, additional, Traianou, Efthalia, additional, Loinard, Laurent, additional, Davelaar, Jordy, additional, Gurwell, Mark, additional, Lu, Ru-Sen, additional, Alberdi, Antxon, additional, Alef, Walter, additional, Algaba, Juan Carlos, additional, Anantua, Richard, additional, Asada, Keiichi, additional, Azulay, Rebecca, additional, Bach, Uwe, additional, Baczko, Anne-Kathrin, additional, Ball, David, additional, Baloković, Mislav, additional, Barrett, John, additional, Bauböck, Michi, additional, Benson, Bradford A., additional, Bintley, Dan, additional, Blundell, Raymond, additional, Boland, Wilfred, additional, Bouman, Katherine L., additional, Bower, Geoffrey C., additional, Boyce, Hope, additional, Bremer, Michael, additional, Brinkerink, Christiaan D., additional, Brissenden, Roger, additional, Britzen, Silke, additional, Broguiere, Dominique, additional, Bronzwaer, Thomas, additional, Bustamante, Sandra, additional, Byun, Do-Young, additional, Carlstrom, John E., additional, Ceccobello, Chiara, additional, Chatterjee, Koushik, additional, Chatterjee, Shami, additional, Chen, Ming-Tang, additional, Chen, Yongjun, additional, Cho, Ilje, additional, Christian, Pierre, additional, Conroy, Nicholas S., additional, Conway, John E., additional, Cordes, James M., additional, Crawford, Thomas M., additional, Crew, Geoffrey B., additional, Cruz-Osorio, Alejandro, additional, Cui, Yuzhu, additional, Laurentis, Mariafelicia De, additional, Deane, Roger, additional, Dempsey, Jessica, additional, Desvignes, Gregory, additional, Dexter, Jason, additional, Doeleman, Sheperd S., additional, Dhruv, Vedant, additional, Dzib Quijano, Sergio Abraham, additional, Eatough, Ralph P., additional, Emami, Razieh, additional, Falcke, Heino, additional, Farah, Joseph, additional, Fish, Vincent L., additional, Fomalont, Ed, additional, Ford, H. Alyson, additional, Fraga-Encinas, Raquel, additional, Freeman, William T., additional, Friberg, Per, additional, Fromm, Christian M., additional, Galison, Peter, additional, Gammie, Charles F., additional, García, Roberto, additional, Gentaz, Olivier, additional, Georgiev, Boris, additional, Goddi, Ciriaco, additional, Gold, Roman, additional, Gómez-Ruiz, Arturo I., additional, Gu, Minfeng, additional, Hada, Kazuhiro, additional, Haggard, Daryl, additional, Hecht, Michael H., additional, Hesper, Ronald, additional, Ho, Luis C., additional, Ho, Paul, additional, Honma, Mareki, additional, Huang, Chih-Wei L., additional, Huang, Lei, additional, Hughes, David H., additional, Ikeda, Shiro, additional, Impellizzeri, C. M. Violette, additional, Inoue, Makoto, additional, James, David J., additional, Jannuzi, Buell T., additional, Jeter, Britton, additional, Jiang, Wu, additional, Jimenez-Rosales, Alejandra, additional, Johnson, Michael D., additional, Joshi, Abhishek V., additional, Jung, Taehyun, additional, Karami, Mansour, additional, Karuppusamy, Ramesh, additional, Kawashima, Tomohisa, additional, Keating, Garrett K., additional, Kettenis, Mark, additional, Kim, Dong-Jin, additional, Kim, Jae-Young, additional, Kim, Jongsoo, additional, Kim, Junhan, additional, Kino, Motoki, additional, Koay, Jun Yi, additional, Kocherlakota, Prashant, additional, Kofuji, Yutaro, additional, Koch, Patrick M., additional, Koyama, Shoko, additional, Kramer, Carsten, additional, Kramer, Michael, additional, Kuo, Cheng-Yu, additional, Bella, Noemi La, additional, Lauer, Tod R., additional, Lee, Daeyoung, additional, Lee, Sang-Sung, additional, Leung, Po Kin, additional, Levis, Aviad, additional, Li, Zhiyuan, additional, Lindahl, Greg, additional, Lindqvist, Michael, additional, Liu, Kuo, additional, Liuzzo, Elisabetta, additional, Lo, Wen-Ping, additional, Lobanov, Andrei P., additional, Lonsdale, Colin, additional, Mao, Jirong, additional, Marchili, Nicola, additional, Markoff, Sera, additional, Marrone, Daniel P., additional, Marscher, Alan P., additional, Matsushita, Satoki, additional, Matthews, Lynn D., additional, Medeiros, Lia, additional, Menten, Karl M., additional, Michalik, Daniel, additional, Mizuno, Izumi, additional, Moran, James M., additional, Müller, Cornelia, additional, Mus, Alejandro, additional, Musoke, Gibwa, additional, Myserlis, Ioannis, additional, Nadolski, Andrew, additional, Nagai, Hiroshi, additional, Nagar, Neil M., additional, Nakamura, Masanori, additional, Narayan, Ramesh, additional, Narayanan, Gopal, additional, Natarajan, Iniyan, additional, Nathanail, Antonios, additional, Neilsen, Joey, additional, Neri, Roberto, additional, Ni, Chunchong, additional, Noutsos, Aristeidis, additional, Nowak, Michael A., additional, Oh, Junghwan, additional, Okino, Hiroki, additional, Olivares, Héctor, additional, Ortiz-León, Gisela N., additional, Oyama, Tomoaki, additional, Özel, Feryal, additional, Palumbo, Daniel C. M., additional, Paraschos, Georgios Filippos, additional, Park, Jongho, additional, Parsons, Harriet, additional, Patel, Nimesh, additional, Pen, Ue-Li, additional, Piétu, Vincent, additional, Plambeck, Richard, additional, PopStefanija, Aleksandar, additional, Porth, Oliver, additional, Pötzl, Felix M., additional, Prather, Ben, additional, Preciado-López, Jorge A., additional, Psaltis, Dimitrios, additional, Pu, Hung-Yi, additional, Rao, Ramprasad, additional, Rawlings, Mark G., additional, Raymond, Alexander W., additional, Rezzolla, Luciano, additional, Ricarte, Angelo, additional, Ripperda, Bart, additional, Roelofs, Freek, additional, Rogers, Alan, additional, Ros, Eduardo, additional, Romero-Canizales, Cristina, additional, Roshanineshat, Arash, additional, Rottmann, Helge, additional, Roy, Alan L., additional, Ruiz, Ignacio, additional, Ruszczyk, Chet, additional, Rygl, Kazi L. J., additional, Sánchez, Salvador, additional, Sánchez-Arguelles, David, additional, Sanchez-Portal, Miguel, additional, Sasada, Mahito, additional, Satapathy, Kaushik, additional, Savolainen, Tuomas, additional, Schloerb, F. Peter, additional, Schuster, Karl-Friedrich, additional, Shao, Lijing, additional, Shen, Zhiqiang, additional, Small, Des, additional, Sohn, Bong Won, additional, SooHoo, Jason, additional, Souccar, Kamal, additional, Sun, He, additional, Tazaki, Fumie, additional, Tetarenko, Alexandra J., additional, Tilanus, Remo P. J., additional, Titus, Michael, additional, Torne, Pablo, additional, Trent, Tyler, additional, Trippe, Sascha, additional, van Bemmel, Ilse, additional, van Langevelde, Huib Jan, additional, van Rossum, Daniel R., additional, Vos, Jesse, additional, Wagner, Jan, additional, Ward-Thompson, Derek, additional, Wardle, John, additional, Weintroub, Jonathan, additional, Wex, Norbert, additional, Wharton, Robert, additional, Wiik, Kaj, additional, Witzel, Gunther, additional, Wondrak, Michael, additional, Wong, George N., additional, Wu, Qingwen, additional, Yamaguchi, Paul, additional, Yoon, Doosoo, additional, Young, André, additional, Young, Ken, additional, Younsi, Ziri, additional, Yuan, Feng, additional, Yuan, Ye-Fei, additional, Zensus, J. Anton, additional, Zhang, Shuo, additional, and Zhao, Shan-Shan, additional

Published
2022
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19. Peering Through the Dust: NuSTAR Observations of Two First-2Mass Red Quasars

Author

Lamassa, Stephanie M, Ricarte, Angelo, Glikman, Eilat, Urry, C. Megan, Stern, Daniel, Yaqoob, Tahir, Lansbury, George B, Civano, Francesca, Boggs, Steve E, and Zhang, Will

Subjects
Astrophysics
Abstract

Some reddened quasars appear to be transitional objects in the paradigm of merger-induced black hole growth/ galaxy evolution, where a heavily obscured nucleus starts to be unveiled by powerful quasar winds evacuating the surrounding cocoon NuSTAR and XMM-Newton/Chandra observations of FIRST-2MASS-selected red quasars F2M 0830+3759 and F2M 1227+3214. We find that though F2M 0830 +3759 is moderately obscured N(sub H) = (2.1 +/- 0.2) x 10 (exp 22) per square centimeter) and F2M 1227+3214 is mildly absorbed (N(sub H),Z =3.4(+0.8/-0.7) X 10(exp -2) along the line of sight, heavier global obscuration may be present in both sources, with N(sub H) = 3.7 (+4.1/-2.6) X 10 (exp 23) per square centimeter) and less than 5.5 X 10(exp 23) per square centimeter) for F2M 0830+3759 and F2M 1227+ 3214, respectively. F2M 0830+3759 also has an excess of soft X-ray emission below 1 of dust and gas. Hard X-ray observations are able to peer through this gas and dust, revealing the properties of circumnuclear obscuration. Here, we present keV, which is well accommodated by a model where 7% of the intrinsic X-ray emission from the active galactic nucleus (AGN) is scattered into the line of sight. While F2M 1227+3214 has a dust-to-gas ratio (E(B - V)/NH) consistent with the Galactic value, the value of E(B - V)/NH for F2M 0830+3759 is lower than the Galactic standard, consistent with the paradigm that the dust resides on galactic scales while the X-ray reprocessing gas originates within the dust sublimation zone of the broad-line region. The X-ray and 6.1 μm luminosities of these red quasars are consistent with the empirical relations derived for high-luminosity, unobscured quasars, extending the parameter space of obscured AGNs previously observed by NuSTAR to higher luminosities.

Published
2016
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20. H.E.S.S. Follow-up Observations of Binary Black Hole Coalescence Events during the Second and Third Gravitational-wave Observing Runs of Advanced LIGO and Advanced Virgo

Author

Abdalla, H., primary, Aharonian, F., additional, Ait Benkhali, F., additional, Angüner, E. O., additional, Ashkar, H., additional, Backes, M., additional, Baghmanyan, V., additional, Barbosa Martins, V., additional, Batzofin, R., additional, Becherini, Y., additional, Berge, D., additional, Bernlöhr, K., additional, Bi, B., additional, Böttcher, M., additional, Boisson, C., additional, Bolmont, J., additional, de Bony de Lavergne, M., additional, Brose, R., additional, Brun, F., additional, Bulik, T., additional, Bylund, T., additional, Cangemi, F., additional, Caroff, S., additional, Casanova, S., additional, Chand, T., additional, Chen, A., additional, Cotter, G., additional, Damascene Mbarubucyeye, J., additional, Devin, J., additional, Djannati-Ataï, A., additional, Egberts, K., additional, Ernenwein, J.-P., additional, Fegan, S., additional, Fiasson, A., additional, Fichet de Clairfontaine, G., additional, Fontaine, G., additional, Funk, S., additional, Gabici, S., additional, Giavitto, G., additional, Giunti, L., additional, Glawion, D., additional, Glicenstein, J. F., additional, Grondin, M.-H., additional, Hinton, J. A., additional, Hörbe, M., additional, Hofmann, W., additional, Holch, T. L., additional, Holler, M., additional, Huang, Zhiqiu, additional, Huber, D., additional, Jamrozy, M., additional, Jankowsky, F., additional, Jung-Richardt, I., additional, Kasai, E., additional, Katarzyński, K., additional, Katz, U., additional, Khélifi, B., additional, Komin, Nu., additional, Konno, R., additional, Kosack, K., additional, Kostunin, D., additional, Kundu, A., additional, Lamanna, G., additional, Le Stum, S., additional, Lemière, A., additional, Lemoine-Goumard, M., additional, Lenain, J.-P., additional, Leuschner, F., additional, Lohse, T., additional, Luashvili, A., additional, Lypova, I., additional, Mackey, J., additional, Majumdar, J., additional, Malyshev, D., additional, Marandon, V., additional, Marchegiani, P., additional, Martí-Devesa, G., additional, Marx, R., additional, Maurin, G., additional, Meintjes, P. J., additional, Mitchell, A., additional, Mohrmann, L., additional, Montanari, A., additional, Moulin, E., additional, Muller, J., additional, Murach, T., additional, de Naurois, M., additional, Nayerhoda, A., additional, Niemiec, J., additional, Priyana Noel, A., additional, O’Brien, P., additional, Ohm, S., additional, Olivera-Nieto, L., additional, de Ona Wilhelmi, E., additional, Ostrowski, M., additional, Panter, M., additional, Parsons, R. D., additional, Peron, G., additional, Poireau, V., additional, Prokhorov, D. A., additional, Prokoph, H., additional, Pühlhofer, G., additional, Punch, M., additional, Quirrenbach, A., additional, Reichherzer, P., additional, Renaud, M., additional, Rieger, F., additional, Rowell, G., additional, Rudak, B., additional, Rueda Ricarte, H., additional, Ruiz-Velasco, E., additional, Sahakian, V., additional, Sailer, S., additional, Salzmann, H., additional, Sanchez, D. A., additional, Santangelo, A., additional, Sasaki, M., additional, Schüssler, F., additional, Schutte, H. M., additional, Schwanke, U., additional, Senniappan, M., additional, Shapopi, J. N. S., additional, Sinha, A., additional, Sol, H., additional, Specovius, A., additional, Spencer, S., additional, Stawarz, Ł., additional, Steinmassl, S., additional, Steppa, C., additional, Sun, L., additional, Takahashi, T., additional, Tanaka, T., additional, Terrier, R., additional, Thorpe-Morgan, C., additional, Tsirou, M., additional, Tsuji, N., additional, Uchiyama, Y., additional, van Eldik, C., additional, Veh, J., additional, Vink, J., additional, Wagner, S. J., additional, Werner, F., additional, White, R., additional, Wierzcholska, A., additional, Wong, Yu Wun, additional, Zacharias, M., additional, Zargaryan, D., additional, Zdziarski, A. A., additional, Zech, A., additional, Zhu, S. J., additional, Zouari, S., additional, and Żywucka, N., additional

Published
2021
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22. Observation of the Gamma-Ray Binary HESS J0632+057 with the H.E.S.S., MAGIC, and VERITAS Telescopes

Author

Adams, C. B., primary, Benbow, W., additional, Brill, A., additional, Buckley, J. H., additional, Capasso, M., additional, Chromey, A. J., additional, Errando, M., additional, Falcone, A., additional, A Farrell, K., additional, Feng, Q., additional, Finley, J. P., additional, M Foote, G., additional, Fortson, L., additional, Furniss, A., additional, Gent, A., additional, Gillanders, G. H., additional, Giuri, C., additional, Gueta, O., additional, Hanna, D., additional, Hassan, T., additional, Hervet, O., additional, Holder, J., additional, Hona, B., additional, Humensky, T. B., additional, Jin, W., additional, Kaaret, P., additional, Kertzman, M., additional, Kieda, D., additional, K Kleiner, T., additional, Krennrich, F., additional, Kumar, S., additional, Lang, M. J., additional, Lundy, M., additional, Maier, G., additional, E McGrath, C., additional, Moriarty, P., additional, Mukherjee, R., additional, Nieto, D., additional, Nievas-Rosillo, M., additional, O’Brien, S., additional, Ong, R. A., additional, Otte, A. N., additional, Park, N., additional, Patel, S., additional, Pfrang, K., additional, Pichel, A., additional, Pohl, M., additional, Prado, R. R., additional, Quinn, J., additional, Ragan, K., additional, Reynolds, P. T., additional, Ribeiro, D., additional, Roache, E., additional, Rovero, A. C., additional, Ryan, J. L., additional, Santander, M., additional, Schlenstedt, S., additional, Sembroski, G. H., additional, Shang, R., additional, Tak, D., additional, Vassiliev, V. V., additional, Weinstein, A., additional, Williams, D. A., additional, J Williamson, T., additional, Acciari, V. A., additional, Ansoldi, S., additional, Antonelli, L. A., additional, Arbet Engels, A., additional, Artero, M., additional, Asano, K., additional, Baack, D., additional, Babić, A., additional, Baquero, A., additional, Barres de Almeida, U., additional, Barrio, J. A., additional, Batković, I., additional, Becerra González, J., additional, Bednarek, W., additional, Bellizzi, L., additional, Bernardini, E., additional, Bernardos, M., additional, Berti, A., additional, Besenrieder, J., additional, Bhattacharyya, W., additional, Bigongiari, C., additional, Biland, A., additional, Blanch, O., additional, Bökenkamp, H., additional, Bonnoli, G., additional, Bošnjak, Ž., additional, Busetto, G., additional, Carosi, R., additional, Ceribella, G., additional, Cerruti, M., additional, Chai, Y., additional, Chilingarian, A., additional, Cikota, S., additional, Colak, S. M., additional, Colombo, E., additional, Contreras, J. L., additional, Cortina, J., additional, Covino, S., additional, D’Amico, G., additional, D’Elia, V., additional, Da Vela, P., additional, Dazzi, F., additional, De Angelis, A., additional, De Lotto, B., additional, Delfino, M., additional, Delgado, J., additional, Delgado Mendez, C., additional, Depaoli, D., additional, Di Pierro, F., additional, Di Venere, L., additional, Do Souto Espiñeira, E., additional, Dominis Prester, D., additional, Donini, A., additional, Dorner, D., additional, Doro, M., additional, Elsaesser, D., additional, Fallah Ramazani, V., additional, Fattorini, A., additional, Fonseca, M. V., additional, Font, L., additional, Fruck, C., additional, Fukami, S., additional, Fukazawa, Y., additional, García López, R. J., additional, Garczarczyk, M., additional, Gasparyan, S., additional, Gaug, M., additional, Giglietto, N., additional, Giordano, F., additional, Gliwny, P., additional, Godinović, N., additional, Green, J. G., additional, Green, D., additional, Hadasch, D., additional, Hahn, A., additional, Heckmann, L., additional, Herrera, J., additional, Hoang, J., additional, Hrupec, D., additional, Hütten, M., additional, Inada, T., additional, Ishio, K., additional, Iwamura, Y., additional, Jiménez Martínez, I., additional, Jormanainen, J., additional, Jouvin, L., additional, Karjalainen, M., additional, Kerszberg, D., additional, Kobayashi, Y., additional, Kubo, H., additional, Kushida, J., additional, Lamastra, A., additional, Lelas, D., additional, Leone, F., additional, Lindfors, E., additional, Linhoff, L., additional, Lombardi, S., additional, Longo, F., additional, López-Coto, R., additional, López-Moya, M., additional, López-Oramas, A., additional, Loporchio, S., additional, Machado de Oliveira Fraga, B., additional, Maggio, C., additional, Majumdar, P., additional, Makariev, M., additional, Mallamaci, M., additional, Maneva, G., additional, Manganaro, M., additional, Mannheim, K., additional, Maraschi, L., additional, Mariotti, M., additional, Martínez, M., additional, Mazin, D., additional, Menchiari, S., additional, Mender, S., additional, Mićanović, S., additional, Miceli, D., additional, Miener, T., additional, Miranda, J. M., additional, Mirzoyan, R., additional, Molina, E., additional, Moralejo, A., additional, Morcuende, D., additional, Moreno, V., additional, Moretti, E., additional, Nakamori, T., additional, Nava, L., additional, Neustroev, V., additional, Nigro, C., additional, Nilsson, K., additional, Nishijima, K., additional, Noda, K., additional, Nozaki, S., additional, Ohtani, Y., additional, Oka, T., additional, Otero-Santos, J., additional, Paiano, S., additional, Palatiello, M., additional, Paneque, D., additional, Paoletti, R., additional, Paredes, J. M., additional, Pavletić, L., additional, Peñil, P., additional, Persic, M., additional, Pihet, M., additional, Prada Moroni, P. G., additional, Prandini, E., additional, Priyadarshi, C., additional, Puljak, I., additional, Rhode, W., additional, Ribó, M., additional, Rico, J., additional, Righi, C., additional, Rugliancich, A., additional, Saha, L., additional, Sahakyan, N., additional, Saito, T., additional, Sakurai, S., additional, Satalecka, K., additional, Saturni, F. G., additional, Schleicher, B., additional, Schmidt, K., additional, Schweizer, T., additional, Sitarek, J., additional, Šnidarić, I., additional, Sobczynska, D., additional, Spolon, A., additional, Stamerra, A., additional, Strišković, J., additional, Strom, D., additional, Strzys, M., additional, Suda, Y., additional, Surić, T., additional, Takahashi, M., additional, Takeishi, R., additional, Tavecchio, F., additional, Temnikov, P., additional, Terzić, T., additional, Teshima, M., additional, Tosti, L., additional, Truzzi, S., additional, Tutone, A., additional, Ubach, S., additional, van Scherpenberg, J., additional, Vanzo, G., additional, Vazquez Acosta, M., additional, Ventura, S., additional, Verguilov, V., additional, Vigorito, C. F., additional, Vitale, V., additional, Vovk, I., additional, Will, M., additional, Wunderlich, C., additional, Yamamoto, T., additional, Zarić, D., additional, Abdalla, H., additional, Aharonian, F., additional, Ait Benkhali, F., additional, Angüner, E. O., additional, Arcaro, C., additional, Ashkar, H., additional, Backes, M., additional, Barbosa Martins, V., additional, Barnard, M., additional, Batzofin, R., additional, Becherini, Y., additional, Berge, D., additional, Bernlöhr, K., additional, Bi, B., additional, Böttcher, M., additional, Boisson, C., additional, Bolmont, J., additional, de Bony de Lavergne, M., additional, Breuhaus, M., additional, Brose, R., additional, Brun, F., additional, Bulik, T., additional, Caroff, S., additional, Casanova, S., additional, Chand, T., additional, Chen, A., additional, Cotter, G., additional, Damascenev Mbarubucyeye, J., additional, Devin, J., additional, Djannati-Ataï, A., additional, Egberts, K., additional, Ernenwein, J.-P., additional, Fegan, S., additional, Fiasson, A., additional, Fichet de Clairfontaine, G., additional, Fontaine, G., additional, Füßling, M., additional, Funk, S., additional, Gabici, S., additional, Giavitto, G., additional, Glawion, D., additional, Glicenstein, J. F., additional, Grondin, M.-H., additional, Hinton, J. A., additional, Hofmann, W., additional, Holch, T. L., additional, Holler, M., additional, Horns, D., additional, Huang, Zhiqiu, additional, Jamrozy, M., additional, Jankowsky, F., additional, Joshi, V., additional, Jung-Richardt, I., additional, Kasai, E., additional, Katarzyński, K., additional, Khélifi, B., additional, Komin, Nu., additional, Kosack, K., additional, Kostunin, D., additional, Le Stum, S., additional, Lemière, A., additional, Lenain, J.-P., additional, Leuschner, F., additional, Levy, C., additional, Lohse, T., additional, Luashvili, A., additional, Lypova, I., additional, Mackey, J., additional, Majumdar, J., additional, Malyshev, D., additional, Marandon, V., additional, Marchegiani, P., additional, Marcowith, A., additional, Martí-Devesa, G., additional, Marx, R., additional, Maurin, G., additional, Meintjes, P. J., additional, Mitchell, A., additional, Moderski, R., additional, Mohrmann, L., additional, Montanari, A., additional, Moulin, E., additional, Muller, J., additional, Murach, T., additional, de Naurois, M., additional, Nayerhoda, A., additional, Niemiec, J., additional, Priyana Noel, A., additional, O’Brien, P., additional, Ohm, S., additional, Olivera-Nieto, L., additional, de Ona Wilhelmi, E., additional, Ostrowski, M., additional, Panny, S., additional, Panter, M., additional, Parsons, R. D., additional, Peron, G., additional, Poireau, V., additional, Prokhorov, D. A., additional, Prokoph, H., additional, Pühlhofer, G., additional, Punch, M., additional, Quirrenbach, A., additional, Reichherzer, P., additional, Reimer, A., additional, Reimer, O., additional, Renaud, M., additional, Rieger, F., additional, Romoli, C., additional, Rowell, G., additional, Rudak, B., additional, Rueda Ricarte, H., additional, Ruiz-Velasco, E., additional, Sahakian, V., additional, Sailer, S., additional, Salzmann, H., additional, Sanchez, D. A., additional, Santangelo, A., additional, Sasaki, M., additional, Schutte, H. M., additional, Schwanke, U., additional, Schüssler, F., additional, Senniappan, M., additional, Shapopi, J. N. S., additional, Simoni, R., additional, Sol, H., additional, Specovius, A., additional, Spencer, S., additional, Steenkamp, R., additional, Steinmassl, S., additional, Sun, L., additional, Takahashi, T., additional, Tanaka, T., additional, Terrier, R., additional, Tsuji, N., additional, Uchiyama, Y., additional, van Eldik, C., additional, van Soelen, B., additional, Veh, J., additional, Venter, C., additional, Vink, J., additional, Wagner, S. J., additional, White, R., additional, Wierzcholska, A., additional, Wun Wong, Yu, additional, Zacharias, M., additional, Zargaryan, D., additional, Zdziarski, A. A., additional, Zech, A., additional, Zhu, S. J., additional, Zouari, S., additional, Żywucka, N., additional, Moritani, Y., additional, and Torres, D. F., additional

Published
2021
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23. A Hidden Population of Massive Black Holes in Simulated Dwarf Galaxies

Author

Ray S. Sharma, Alyson M. Brooks, Michael Tremmel, Jillian Bellovary, Angelo Ricarte, and Thomas R. Quinn

Subjects
Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics::Solar and Stellar Astrophysics, Astronomy and Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics - Astrophysics of Galaxies, Astrophysics::Galaxy Astrophysics
Abstract

We explore the characteristics of actively accreting massive black holes (MBHs) within dwarf galaxies in the Romulus25 cosmological hydrodynamic simulation. We examine the MBH occupation fraction, X-ray active fractions, and active galactic nucleus (AGN) scaling relations within dwarf galaxies of stellar mass 108 M ⊙ < M star < 1010 M ⊙ out to redshift z = 2. In the local universe, the MBH occupation fraction is consistent with observed constraints, dropping below unity at M star < 3 × 1010 M ⊙, M 200 < 3 × 1011 M ⊙. Local dwarf AGN in Romulus25 follow observed scaling relations between AGN X-ray luminosity, stellar mass, and star formation rate, though they exhibit slightly higher active fractions and number densities than comparable X-ray observations. Since z = 2, the MBH occupation fraction has decreased, the population of dwarf AGN has become overall less luminous, and as a result the overall number density of dwarf AGN has diminished. We predict the existence of a large population of MBHs in the local universe with low X-ray luminosities and high contamination from X-ray binaries and the hot interstellar medium that are undetectable by current X-ray surveys. These hidden MBHs make up 76% of all MBHs in local dwarf galaxies and include many MBHs that are undermassive relative to their host galaxy’s stellar mass. Their detection relies on not only greater instrument sensitivity but also better modeling of X-ray contaminants or multiwavelength surveys. Our results indicate that dwarf AGN were substantially more active in the past, despite having low luminosity today, and that future deep X-ray surveys may uncover many hidden MBHs in dwarf galaxies out to at least z = 2.

Published
2022
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24. Searching for TeV Gamma-Ray Emission from SGR 1935+2154 during Its 2020 X-Ray and Radio Bursting Phase

Author

Abdalla, H., primary, Aharonian, F., additional, Ait Benkhali, F., additional, Angüner, E. O., additional, Arcaro, C., additional, Armand, C., additional, Armstrong, T., additional, Ashkar, H., additional, Backes, M., additional, Baghmanyan, V., additional, Barbosa Martins, V., additional, Barnacka, A., additional, Barnard, M., additional, Becherini, Y., additional, Berge, D., additional, Bernlöhr, K., additional, Bi, B., additional, Böttcher, M., additional, Boisson, C., additional, Bolmont, J., additional, de Bony de Lavergne, M., additional, Breuhaus, M., additional, Brose, R., additional, Brun, F., additional, Brun, P., additional, Bryan, M., additional, Büchele, M., additional, Bulik, T., additional, Bylund, T., additional, Cangemi, F., additional, Caroff, S., additional, Carosi, A., additional, Casanova, S., additional, Chambery, P., additional, Chand, T., additional, Chandra, S., additional, Chen, A., additional, Cotter, G., additional, Curyło, M., additional, Damascene Mbarubucyeye, J., additional, Davids, I. D., additional, Davies, J., additional, Deil, C., additional, Devin, J., additional, Dirson, L., additional, Djannati-Ataï, A., additional, Dmytriiev, A., additional, Donath, A., additional, Doroshenko, V., additional, Dreyer, L., additional, Duffy, C., additional, Du Plessis, L., additional, Dyks, J., additional, Egberts, K., additional, Eichhorn, F., additional, Einecke, S., additional, Emery, G., additional, Ernenwein, J.-P., additional, Feijen, K., additional, Fegan, S., additional, Fiasson, A., additional, Fichet de Clairfontaine, G., additional, Fontaine, G., additional, Funk, S., additional, Füßling, M., additional, Gabici, S., additional, Gallant, Y. A., additional, Ghafourizade, S., additional, Giavitto, G., additional, Giunti, L., additional, Glawion, D., additional, Glicenstein, J. F., additional, Grondin, M.-H., additional, Hahn, J., additional, Haupt, M., additional, Hattingh, S., additional, Hermann, G., additional, Hinton, J. A., additional, Hofmann, W., additional, Hoischen, C., additional, Holch, T. L., additional, Holler, M., additional, Hörbe, M., additional, Horns, D., additional, Huang, Z., additional, Huber, D., additional, Jamrozy, M., additional, Jankowsky, D., additional, Jankowsky, F., additional, Jardin-Blicq, A., additional, Joshi, V., additional, Jung-Richardt, I., additional, Kasai, E., additional, Kastendieck, M. A., additional, Katarzyński, K., additional, Katz, U., additional, Khangulyan, D., additional, Khélifi, B., additional, Klepser, S., additional, Kluźniak, W., additional, Komin, Nu., additional, Konno, R., additional, Kosack, K., additional, Kostunin, D., additional, Kreter, M., additional, Kukec Mezek, G., additional, Kundu, A., additional, Lamanna, G., additional, Lemière, A., additional, Lemoine-Goumard, M., additional, Lenain, J.-P., additional, Le Stum, S., additional, Leuschner, F., additional, Levy, C., additional, Lohse, T., additional, Luashvili, A., additional, Lypova, I., additional, Mackey, J., additional, Majumdar, J., additional, Malyshev, D., additional, Marandon, V., additional, Marchegiani, P., additional, Marcowith, A., additional, Mares, A., additional, Martí-Devesa, G., additional, Marx, R., additional, Maurin, G., additional, Meintjes, P. J., additional, Meyer, M., additional, Mitchell, A., additional, Moderski, R., additional, Mohrmann, L., additional, Montanari, A., additional, Moore, C., additional, Morris, P., additional, Moulin, E., additional, Muller, J., additional, Murach, T., additional, Nakashima, K., additional, Nayerhoda, A., additional, de Naurois, M., additional, Ndiyavala, H., additional, Niemiec, J., additional, Oakes, L., additional, O’Brien, P., additional, Odaka, H., additional, Ohm, S., additional, Olivera-Nieto, L., additional, de Ona Wilhelmi, E., additional, Ostrowski, M., additional, Panny, S., additional, Panter, M., additional, Parsons, R. D., additional, Peron, G., additional, Peyaud, B., additional, Piel, Q., additional, Pita, S., additional, Poireau, V., additional, Priyana Noel, A., additional, Prokhorov, D. A., additional, Prokoph, H., additional, Pühlhofer, G., additional, Punch, M., additional, Quirrenbach, A., additional, Raab, S., additional, Rauth, R., additional, Reichherzer, P., additional, Reimer, A., additional, Reimer, O., additional, Remy, Q., additional, Renaud, M., additional, Reville, B., additional, Rieger, F., additional, Rinchiuso, L., additional, Romoli, C., additional, Rowell, G., additional, Rudak, B., additional, Rueda Ricarte, H., additional, Ruiz-Velasco, E., additional, Sahakian, V., additional, Sailer, S., additional, Salzmann, H., additional, Sanchez, D. A., additional, Santangelo, A., additional, Sasaki, M., additional, Schäfer, J., additional, Schüssler, F., additional, Schutte, H. M., additional, Schwanke, U., additional, Seglar-Arroyo, M., additional, Senniappan, M., additional, Seyffert, A. S., additional, Shafi, N., additional, Shapopi, J. N. S., additional, Shiningayamwe, K., additional, Simoni, R., additional, Sinha, A., additional, Sol, H., additional, Spackman, H., additional, Specovius, A., additional, Spencer, S., additional, Spir-Jacob, M., additional, Stawarz, Ł., additional, Sun, L., additional, Steenkamp, R., additional, Stegmann, C., additional, Steinmassl, S., additional, Steppa, C., additional, Takahashi, T., additional, Tanaka, T., additional, Tavernier, T., additional, Taylor, A. M., additional, Terrier, R., additional, Thiersen, J. H. E., additional, Thorpe-Morgan, C., additional, Tiziani, D., additional, Tluczykont, M., additional, Tomankova, L., additional, Trichard, C., additional, Tsirou, M., additional, Tsuji, N., additional, Tuffs, R., additional, Uchiyama, Y., additional, van der Walt, D. J., additional, van Eldik, C., additional, van Rensburg, C., additional, van Soelen, B., additional, Vasileiadis, G., additional, Veh, J., additional, Venter, C., additional, Vincent, P., additional, Vink, J., additional, Völk, H. J., additional, Wadiasingh, Z., additional, Wagner, S. J., additional, Watson, J., additional, Werner, F., additional, White, R., additional, Wierzcholska, A., additional, deWilt, P., additional, Wong, Yu Wun, additional, Yassin, H., additional, Yusafzai, A., additional, Zacharias, M., additional, Zanin, R., additional, Zargaryan, D., additional, Zdziarski, A. A., additional, Zech, A., additional, Zhu, S. J., additional, Zorn, J., additional, Zouari, S., additional, and Żywucka, N., additional

Published
2021
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25. Search for Dark Matter Annihilation Signals from Unidentified Fermi-LAT Objects with H.E.S.S.

Author

Abdalla, H., primary, Aharonian, F., additional, Ait Benkhali, F., additional, Angüner, E. O., additional, Arcaro, C., additional, Armand, C., additional, Armstrong, T., additional, Ashkar, H., additional, Backes, M., additional, Baghmanyan, V., additional, Barbosa-Martins, V., additional, Barnacka, A., additional, Barnard, M., additional, Becherini, Y., additional, Berge, D., additional, Bernlöhr, K., additional, Bi, B., additional, Böttcher, M., additional, Boisson, C., additional, Bolmont, J., additional, de Bony de Lavergne, M., additional, Breuhaus, M., additional, Brose, R., additional, Brun, F., additional, Bulik, T., additional, Bylund, T., additional, Cangemi, F., additional, Caroff, S., additional, Casanova, S., additional, Chambery, P., additional, Catalano, J., additional, Chand, T., additional, Chen, A., additional, Cotter, G., additional, Curyło, M., additional, Dalgleish, H., additional, Mbarubucyeye, J. Damascene, additional, Davids, I. D., additional, Davies, J., additional, Devin, J., additional, Djannati-Ataï, A., additional, Dmytriiev, A., additional, Donath, A., additional, Doroshenko, V., additional, Dreyer, L., additional, du Plessis, L., additional, Duffy, C., additional, Egberts, K., additional, Einecke, S., additional, Emery, G., additional, Ernenwein, J.-P., additional, Feijen, K., additional, Fegan, S., additional, Fiasson, A., additional, de Clairfontaine, G. Fichet, additional, Fontaine, G., additional, Funk, S., additional, Füssling, M., additional, Gabici, S., additional, Gallant, Y. A., additional, Ghafourizade, S., additional, Giavitto, G., additional, Giunti, L., additional, Glawion, D., additional, Glicenstein, J. F., additional, Grondin, M.-H., additional, Hattingh, S., additional, Haupt, M., additional, Hermann, G., additional, Hinton, J. A., additional, Hofmann, W., additional, Hoischen, C., additional, Holch, T. L., additional, Holler, M., additional, Hörbe, M., additional, Horns, D., additional, Huang, Z., additional, Huber, D., additional, Jamrozy, M., additional, Jankowsky, D., additional, Jankowsky, F., additional, Joshi, V., additional, Jung-Richardt, I., additional, Kasai, E., additional, Katarzyński, K., additional, Katz, U., additional, Khangulyan, D., additional, Khélifi, B., additional, Klepser, S., additional, Kluźniak, W., additional, Komin, Nu., additional, Konno, R., additional, Kosack, K., additional, Kostunin, D., additional, Kreter, M., additional, Kukec Mezek, G., additional, Kundu, A., additional, Lamanna, G., additional, Le Stum, S., additional, Lemière, A., additional, Lemoine-Goumard, M., additional, Lenain, J.-P., additional, Leuschner, F., additional, Levy, C., additional, Luashvili, A., additional, Lohse, T., additional, Lypova, I., additional, Mackey, J., additional, Majumdar, J., additional, Malyshev, D., additional, Marandon, V., additional, Marchegiani, P., additional, Marcowith, A., additional, Mares, A., additional, Martí-Devesa, G., additional, Marx, R., additional, Maurin, G., additional, Meintjes, P. J., additional, Meyer, M., additional, Mitchell, A., additional, Moderski, R., additional, Mohrmann, L., additional, Montanari, A., additional, Moore, C., additional, Morris, P., additional, Moulin, E., additional, Muller, J., additional, Murach, T., additional, Nakashima, K., additional, Nayerhoda, A., additional, de Naurois, M., additional, Ndiyavala, H., additional, Niemiec, J., additional, Noel, A., additional, Oberholzer, L., additional, O’Brien, P., additional, Ohm, S., additional, Olivera-Nieto, L., additional, de Ona Wilhelmi, E., additional, Ostrowski, M., additional, Panter, M., additional, Panny, S., additional, Parsons, R. D., additional, Peron, G., additional, Pita, S., additional, Poireau, V., additional, Prokhorov, D. A., additional, Prokoph, H., additional, Pühlhofer, G., additional, Punch, M., additional, Quirrenbach, A., additional, Reichherzer, P., additional, Reimer, A., additional, Reimer, O., additional, Remy, Q., additional, Renaud, M., additional, Rieger, F., additional, Romoli, C., additional, Rowell, G., additional, Rudak, B., additional, Rueda Ricarte, H., additional, Ruiz-Velasco, E., additional, Sahakian, V., additional, Sailer, S., additional, Salzmann, H., additional, Sanchez, D. A., additional, Santangelo, A., additional, Sasaki, M., additional, Schäfer, J., additional, Schüssler, F., additional, Schutte, H. M., additional, Schwanke, U., additional, Senniappan, M., additional, Seyffert, A. S., additional, Shapopi, J. N. S., additional, Shiningayamwe, K., additional, Simoni, R., additional, Sinha, A., additional, Spackman, H., additional, Sol, H., additional, Specovius, A., additional, Spencer, S., additional, Spir-Jacob, M., additional, Stawarz, Ł., additional, Sun, L., additional, Steenkamp, R., additional, Stegmann, C., additional, Steinmassl, S., additional, Steppa, C., additional, Takahashi, T., additional, Tanaka, T., additional, Tavernier, T., additional, Taylor, A. M., additional, Terrier, R., additional, Thorpe-Morgan, C., additional, Thiersen, J. H. E., additional, Tluczykont, M., additional, Tomankova, L., additional, Tsirou, M., additional, Tsuji, M., additional, Tuffs, R., additional, Uchiyama, Y., additional, van der Walt, D. J., additional, van Eldik, C., additional, van Rensburg, C., additional, van Soelen, B., additional, Vasileiadis, G., additional, Veh, J., additional, Venter, C., additional, Vincent, P., additional, Viana, A., additional, Vink, J., additional, Völk, H. J., additional, Wagner, S. J., additional, Werner, F., additional, White, R., additional, Wierzcholska, A., additional, Wong, Yu Wun, additional, Yassin, H., additional, Yusafzai, A., additional, Zacharias, M., additional, Zanin, R., additional, Zargaryan, D., additional, Zdziarski, A. A., additional, Zech, A., additional, Zhu, S. J., additional, Zmija, A., additional, Zorn, J., additional, Zouari, S., additional, and Żywucka, N., additional

Published
2021
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26. The Polarized Image of a Synchrotron-emitting Ring of Gas Orbiting a Black Hole

Author

Narayan, Ramesh, primary, Palumbo, Daniel C. M., additional, Johnson, Michael D., additional, Gelles, Zachary, additional, Himwich, Elizabeth, additional, Chang, Dominic O., additional, Ricarte, Angelo, additional, Dexter, Jason, additional, Gammie, Charles F., additional, Chael, Andrew A., additional, Akiyama, Kazunori, additional, Alberdi, Antxon, additional, Alef, Walter, additional, Algaba, Juan Carlos, additional, Anantua, Richard, additional, Asada, Keiichi, additional, Azulay, Rebecca, additional, Baczko, Anne-Kathrin, additional, Ball, David, additional, Baloković, Mislav, additional, Barrett, John, additional, Benson, Bradford A., additional, Bintley, Dan, additional, Blackburn, Lindy, additional, Blundell, Raymond, additional, Boland, Wilfred, additional, Bouman, Katherine L., additional, Bower, Geoffrey C., additional, Boyce, Hope, additional, Bremer, Michael, additional, Brinkerink, Christiaan D., additional, Brissenden, Roger, additional, Britzen, Silke, additional, Broderick, Avery E., additional, Broguiere, Dominique, additional, Bronzwaer, Thomas, additional, Byun, Do-Young, additional, Carlstrom, John E., additional, Chan, Chi-kwan, additional, Chatterjee, Shami, additional, Chatterjee, Koushik, additional, Chen, Ming-Tang, additional, Chen, Yongjun, additional, Chesler, Paul M., additional, Cho, Ilje, additional, Christian, Pierre, additional, Conway, John E., additional, Cordes, James M., additional, Crawford, Thomas M., additional, Crew, Geoffrey B., additional, Cruz-Osorio, Alejandro, additional, Cui, Yuzhu, additional, Davelaar, Jordy, additional, De Laurentis, Mariafelicia, additional, Deane, Roger, additional, Dempsey, Jessica, additional, Desvignes, Gregory, additional, Doeleman, Sheperd S., additional, Eatough, Ralph P., additional, Falcke, Heino, additional, Farah, Joseph, additional, Fish, Vincent L., additional, Fomalont, Ed, additional, Ford, H. Alyson, additional, Fraga-Encinas, Raquel, additional, Friberg, Per, additional, Fromm, Christian M., additional, Fuentes, Antonio, additional, Galison, Peter, additional, García, Roberto, additional, Gentaz, Olivier, additional, Georgiev, Boris, additional, Goddi, Ciriaco, additional, Gold, Roman, additional, Gómez, José L., additional, Gómez-Ruiz, Arturo I., additional, Gu, Minfeng, additional, Gurwell, Mark, additional, Hada, Kazuhiro, additional, Haggard, Daryl, additional, Hecht, Michael H., additional, Hesper, Ronald, additional, Ho, Luis C., additional, Ho, Paul, additional, Honma, Mareki, additional, Huang, Chih-Wei L., additional, Huang, Lei, additional, Hughes, David H., additional, Ikeda, Shiro, additional, Inoue, Makoto, additional, Issaoun, Sara, additional, James, David J., additional, Jannuzi, Buell T., additional, Janssen, Michael, additional, Jeter, Britton, additional, Jiang, Wu, additional, Jimenez-Rosales, Alejandra, additional, Jorstad, Svetlana, additional, Jung, Taehyun, additional, Karami, Mansour, additional, Karuppusamy, Ramesh, additional, Kawashima, Tomohisa, additional, Keating, Garrett K., additional, Kettenis, Mark, additional, Kim, Dong-Jin, additional, Kim, Jae-Young, additional, Kim, Jongsoo, additional, Kim, Junhan, additional, Kino, Motoki, additional, Koay, Jun Yi, additional, Kofuji, Yutaro, additional, Koch, Patrick M., additional, Koyama, Shoko, additional, Kramer, Michael, additional, Kramer, Carsten, additional, Krichbaum, Thomas P., additional, Kuo, Cheng-Yu, additional, Lauer, Tod R., additional, Lee, Sang-Sung, additional, Levis, Aviad, additional, Li, Yan-Rong, additional, Li, Zhiyuan, additional, Lindqvist, Michael, additional, Lico, Rocco, additional, Lindahl, Greg, additional, Liu, Jun, additional, Liu, Kuo, additional, Liuzzo, Elisabetta, additional, Lo, Wen-Ping, additional, Lobanov, Andrei P., additional, Loinard, Laurent, additional, Lonsdale, Colin, additional, Lu, Ru-Sen, additional, MacDonald, Nicholas R., additional, Mao, Jirong, additional, Marchili, Nicola, additional, Markoff, Sera, additional, Marrone, Daniel P., additional, Marscher, Alan P., additional, Martí-Vidal, Iván, additional, Matsushita, Satoki, additional, Matthews, Lynn D., additional, Medeiros, Lia, additional, Menten, Karl M., additional, Mizuno, Izumi, additional, Mizuno, Yosuke, additional, Moran, James M., additional, Moriyama, Kotaro, additional, Moscibrodzka, Monika, additional, Müller, Cornelia, additional, Musoke, Gibwa, additional, Mejías, Alejandro Mus, additional, Nagai, Hiroshi, additional, Nagar, Neil M., additional, Nakamura, Masanori, additional, Narayanan, Gopal, additional, Natarajan, Iniyan, additional, Nathanail, Antonios, additional, Neilsen, Joey, additional, Neri, Roberto, additional, Ni, Chunchong, additional, Noutsos, Aristeidis, additional, Nowak, Michael A., additional, Okino, Hiroki, additional, Olivares, Héctor, additional, Ortiz-León, Gisela N., additional, Oyama, Tomoaki, additional, Özel, Feryal, additional, Park, Jongho, additional, Patel, Nimesh, additional, Pen, Ue-Li, additional, Pesce, Dominic W., additional, Piétu, Vincent, additional, Plambeck, Richard, additional, PopStefanija, Aleksandar, additional, Porth, Oliver, additional, Pötzl, Felix M., additional, Prather, Ben, additional, Preciado-López, Jorge A., additional, Psaltis, Dimitrios, additional, Pu, Hung-Yi, additional, Ramakrishnan, Venkatessh, additional, Rao, Ramprasad, additional, Rawlings, Mark G., additional, Raymond, Alexander W., additional, Rezzolla, Luciano, additional, Ripperda, Bart, additional, Roelofs, Freek, additional, Rogers, Alan, additional, Ros, Eduardo, additional, Rose, Mel, additional, Roshanineshat, Arash, additional, Rottmann, Helge, additional, Roy, Alan L., additional, Ruszczyk, Chet, additional, Rygl, Kazi L. J., additional, Sánchez, Salvador, additional, Sánchez-Arguelles, David, additional, Sasada, Mahito, additional, Savolainen, Tuomas, additional, Schloerb, F. Peter, additional, Schuster, Karl-Friedrich, additional, Shao, Lijing, additional, Shen, Zhiqiang, additional, Small, Des, additional, Sohn, Bong Won, additional, SooHoo, Jason, additional, Sun, He, additional, Tazaki, Fumie, additional, Tetarenko, Alexandra J., additional, Tiede, Paul, additional, Tilanus, Remo P. J., additional, Titus, Michael, additional, Toma, Kenji, additional, Torne, Pablo, additional, Trent, Tyler, additional, Traianou, Efthalia, additional, Trippe, Sascha, additional, van Bemmel, Ilse, additional, van Langevelde, Huib Jan, additional, van Rossum, Daniel R., additional, Wagner, Jan, additional, Ward-Thompson, Derek, additional, Wardle, John, additional, Weintroub, Jonathan, additional, Wex, Norbert, additional, Wharton, Robert, additional, Wielgus, Maciek, additional, Wong, George N., additional, Wu, Qingwen, additional, Yoon, Doosoo, additional, Young, André, additional, Young, Ken, additional, Younsi, Ziri, additional, Yuan, Feng, additional, Yuan, Ye-Fei, additional, Zensus, J. Anton, additional, Zhao, Guang-Yao, additional, and Zhao, Shan-Shan, additional

Published
2021
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28. Unveiling the First Black Holes WithJWST:Multi-wavelength Spectral Predictions

Author

Fabio Pacucci, Angelo Ricarte, Priyamvada Natarajan, Bhaskar Agarwal, Andrea Ferrara, Erik Zackrisson, Nico Cappelluti, Natarajan, Priyamvada, Pacucci, Fabio, Ferrara, Andrea, Agarwal, Bhaskar, Ricarte, Angelo, Zackrisson, Erik, and Cappelluti, Nico

Subjects
Physics, Supermassive black hole, Cosmology and Nongalactic Astrophysics (astro-ph.CO), 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astronomy and Astrophysics, Quasar, Multi wavelength, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Astrophysics - Astrophysics of Galaxies, 01 natural sciences, General Relativity and Quantum Cosmology, 13. Climate action, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), 0103 physical sciences, Dark Ages, Astrophysics::Solar and Stellar Astrophysics, 010303 astronomy & astrophysics, Reionization, Astrophysics::Galaxy Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

Growing the supermassive black holes (~10^9 Msun) that power the detected luminous, highest redshift quasars (z > 6) from light seeds - the remnants of the first stars - within ~ 1 Gyr of the Big Bang poses a timing challenge for growth models. The formation of massive black hole seeds via direct collapse with initial masses ~ 10^4 - 10^5 Msun alleviates this problem. Physical conditions required to form these massive direct collapse black hole (DCBH) seeds are available in the early universe. These viable DCBH formation sites, satellite halos of star-forming galaxies, merge and acquire a stellar component. These produce a new, transient class of objects at high redshift, Obese Black hole Galaxies (OBGs), where the luminosity produced by accretion onto the black hole outshines the stellar component. Therefore, the OBG stage offers a unique way to discriminate between light and massive initial seeds. We predict the multi-wavelength energy output of OBGs and growing Pop III remnants at a fiducial redshift (z = 9), exploring both standard and slim disk accretion onto the growing central black hole for high and low metallicities of the associated stellar population. With our computed templates, we derive the selection criteria for OBGs, that comprise a pre-selection that eliminates blue sources; followed by color-color cuts ([F_{070W} - F_{220W}] > 0; -0.3 < [F_{200W} - F_{444W}] < 0.3) and when available, a high ratio of X-ray flux to rest-frame optical flux (F_X/F_{444W} >> 1) (Abridged)., 12 pages, 13 figures, accepted, in press, ApJ

Published
2017
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30. The Chandra COSMOS Legacy Survey: Energy Spectrum of the Cosmic X-Ray Background and Constraints on Undetected Populations

Author

Cappelluti, Nico, primary, Li, Yanxia, additional, Ricarte, Angelo, additional, Agarwal, Bhaskar, additional, Allevato, Viola, additional, Ananna, Tonima Tasnim, additional, Ajello, Marco, additional, Civano, Francesca, additional, Comastri, Andrea, additional, Elvis, Martin, additional, Finoguenov, Alexis, additional, Gilli, Roberto, additional, Hasinger, Günther, additional, Marchesi, Stefano, additional, Natarajan, Priyamvada, additional, Pacucci, Fabio, additional, Treister, E., additional, and Urry, C. Megan, additional

Published
2017
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31. PEERING THROUGH THE DUST:NuSTAROBSERVATIONS OF TWO FIRST-2MASS RED QUASARS

Author

LaMassa, Stephanie M., primary, Ricarte, Angelo, additional, Glikman, Eilat, additional, Urry, C. Megan, additional, Stern, Daniel, additional, Yaqoob, Tahir, additional, Lansbury, George B., additional, Civano, Francesca, additional, Boggs, Steve E., additional, Brandt, W. N., additional, Chen, Chien-Ting J., additional, Christensen, Finn E., additional, Craig, William W., additional, Hailey, Chuck J., additional, Harrison, Fiona, additional, Hickox, Ryan C., additional, Koss, Michael, additional, Ricci, Claudio, additional, Treister, Ezequiel, additional, and Zhang, Will, additional

Published
2016
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33. RESOLVING THE MOTH AT MILLIMETER WAVELENGTHS

Author

Ricarte, Angelo, primary, Moldvai, Noel, additional, Hughes, A. Meredith, additional, Duchêne, Gaspard, additional, Williams, Jonathan P., additional, Andrews, Sean M., additional, and Wilner, David J., additional

Published
2013
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