A1 Refereed original research article in a scientific journal
First Sagittarius A* Event Horizon Telescope Results. V. Testing Astrophysical Models of the Galactic Center Black Hole
Authors: Event Horizon Telescope Collaboration, Akiyama Kazunori, Alberdi Antxon, Alef Walter, Algaba Juan Carlos, Anantua Richard, Asada Keiichi, Azulay Rebecca, Bach Uwe, Baczko Anne-Kathrin, Ball David, Baloković Mislav, Barrett John, Bauböck Michi, Benson Bradford A., Bintley Dan, Blackburn Lindy, Blundell Raymond, Bouman Katherine L., Bower Geoffrey C., Boyce Hope, Bremer Michael, Brinkerink Christiaan D., Brissenden Roger, Britzen Silke, Broderick Avery E., Broguiere Dominique, Bronzwaer Thomas, Bustamante Sandra, Byun Do-Young, Carlstrom John E., Ceccobello Chiara, Chael Andrew, Chan Chi-kwan, Chatterjee Koushik, Chatterjee Shami, Chen Ming-Tang, Chen Yongjun, Cheng Xiaopeng, Cho Ilje, Christian Pierre, Conroy Nicholas S., Conway John E., Cordes James M., Crawford Thomas M., Crew Geoffrey B., Cruz-Osorio Alejandro, Cui Yuzhu, Davelaar Jordy, De Laurentis Mariafelicia, Deane Roger, Dempsey Jessica, Desvignes Gregory, Dexter Jason, Dhruv Vedant, Doeleman Sheperd S., Dougal Sean, Dzib Sergio A., Eatough Ralph P., Emami Razieh, Falcke Heino, Farah Joseph, Fish Vincent L., Fomalont Ed, Ford H. Alyson, Fraga-Encinas Raquel, Freeman William T., Friberg Per, Fromm Christian M., Fuentes Antonio, Galison Peter, Gammie Charles F., García Roberto, Gentaz Olivier, Georgiev Boris, Goddi Ciriaco, Gold Roman, Gómez-Ruiz Arturo I., Gómez José L., Gu Minfeng, Gurwell Mark, Hada Kazuhiro, Haggard Daryl, Haworth Kari, Hecht Michael H., Hesper Ronald, Heumann Dirk, Ho Luis C., Ho Paul, Honma Mareki, Huang Chih-Wei L., Huang Lei, Hughes David H., Ikeda Shiro, Impellizzeri C. M. Violette, Inoue Makoto, Issaoun Sara, James David J., Jannuzi Buell T., Janssen Michael, Jeter Britton, Jiang Wu, Jiménez-Rosales Alejandra, Johnson Michael D., Jorstad Svetlana, Joshi Abhishek V., Jung Taehyun, Karami Mansour, Karuppusamy Ramesh, Kawashima Tomohisa, Keating Garrett K., Kettenis Mark, Kim Dong-Jin, Kim Jae-Young, Kim Jongsoo, Kim Junhan, Kino Motoki, Koay Jun Yi, Kocherlakota Prashant, Kofuji Yutaro, Koch Patrick M., Koyama Shoko, Kramer Carsten, Kramer Michael, Krichbaum Thomas P., Kuo Cheng-Yu, La Bella Noemi, Lauer Tod R., Lee Daeyoung, Lee Sang-Sung, Leung Po Kin, Levis Aviad, Li Zhiyuan, Lico Rocco, Lindahl Greg, Lindqvist Michael, Lisakov Mikhail, Liu Jun, Liu Kuo, Liuzzo Elisabetta, Lo Wen-Ping, Lobanov Andrei P., Loinard Laurent, Lonsdale Colin J., Lu Ru-Sen, Mao Jirong, Marchili Nicola, Markoff Sera, Marrone Daniel P., Marscher Alan P., Martí-Vidal Iván, Matsushita Satoki, Matthews Lynn D., Medeiros Lia, Menten Karl M., Michalik Daniel, Mizuno Izumi, Mizuno Yosuke, Moran James M., Moriyama Kotaro, Moscibrodzka Monika, Müller Cornelia, Mus Alejandro, Musoke Gibwa, Myserlis Ioannis, Nadolski Andrew, Nagai Hiroshi, Nagar Neil M., Nakamura Masanori, Narayan Ramesh, Narayanan Gopal, Natarajan Iniyan, Nathanail Antonios, Navarro Fuentes Santiago, Neilsen Joey, Neri Roberto, Ni Chunchong, Noutsos Aristeidis, Nowak Michael A., Oh Junghwan, Okino Hiroki, Olivares Héctor, Ortiz-León Gisela N., Oyama Tomoaki, Özel Feryal, Palumbo Daniel C. M., Paraschos Georgios Filippos, Park Jongho, Parsons Harriet, Patel Nimesh, Pen Ue-Li, Pesce Dominic W., Piétu Vincent, Plambeck Richard, PopStefanija Aleksandar, Porth Oliver, Pötzl Felix M., Prather Ben, Preciado-López Jorge A., Psaltis Dimitrios, Pu Hung-Yi, Ramakrishnan Venkatessh, Rao Ramprasad, Rawlings Mark G., Raymond Alexander W., Rezzolla Luciano, Ricarte Angelo, Ripperda Bart, Roelofs Freek, Rogers Alan, Ros Eduardo, Romero-Cañizales Cristina, Roshanineshat Arash, Rottmann Helge, Roy Alan L., Ruiz Ignacio, Ruszczyk Chet, Rygl Kazi L. J., Sánchez Salvador, Sánchez-Argüelles David, Sánchez-Portal Miguel, Sasada Mahito, Satapathy Kaushik, Savolainen Tuomas, Schloerb F. Peter, Schonfeld Jonathan, Schuster Karl-Friedrich, Shao Lijing, Shen Zhiqiang, Small Des, Sohn Bong Won, SooHoo Jason, Souccar Kamal, Sun He, Tazaki Fumie, Tetarenko Alexandra J., Tiede Paul, Tilanus Remo P. J., Titus Michael, Torne Pablo, Traianou Efthalia, Trent Tyler, Trippe Sascha, Turk Matthew, van Bemmel Ilse, van Langevelde Huib Jan, van Rossum Daniel R., Vos Jesse, Wagner Jan, Ward-Thompson Derek, Wardle John, Weintroub Jonathan, Wex Norbert, Wharton Robert, Wielgus Maciek, Wiik Kaj, Witzel Gunther, Wondrak Michael F., Wong George N., Wu Qingwen, Yamaguchi Paul, Yoon Doosoo, Young André, Young Ken, Younsi Ziri, Yuan Feng, Yua Ye-Fei, Zensus J. Anton, Zhang Shuo, Zhao Guang-Yao, Zhao Shan-Shan, Tin Lok Chan, Qiu Richard, Ressler Sean, White Chris
Publisher: IOP Publishing Ltd
Publication year: 2022
Journal: Astrophysical Journal Letters
Journal name in source: ASTROPHYSICAL JOURNAL LETTERS
Journal acronym: ASTROPHYS J LETT
Article number: L16
Volume: 930
Issue: 2
Number of pages: 49
ISSN: 2041-8205
eISSN: 2041-8213
DOI: https://doi.org/10.3847/2041-8213/ac6672
Web address : https://iopscience.iop.org/article/10.3847/2041-8213/ac6672
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/175419901
In this paper we provide a first physical interpretation for the Event Horizon Telescope's (EHT) 2017 observations of Sgr A*. Our main approach is to compare resolved EHT data at 230 GHz and unresolved non-EHT observations from radio to X-ray wavelengths to predictions from a library of models based on time-dependent general relativistic magnetohydrodynamics simulations, including aligned, tilted, and stellar-wind-fed simulations; radiative transfer is performed assuming both thermal and nonthermal electron distribution functions. We test the models against 11 constraints drawn from EHT 230 GHz data and observations at 86 GHz, 2.2 mu m, and in the X-ray. All models fail at least one constraint. Light-curve variability provides a particularly severe constraint, failing nearly all strongly magnetized (magnetically arrested disk (MAD)) models and a large fraction of weakly magnetized models. A number of models fail only the variability constraints. We identify a promising cluster of these models, which are MAD and have inclination i <= 30 degrees. They have accretion rate (5.2-9.5) x 10(-9) M (circle dot) yr(-1), bolometric luminosity (6.8-9.2) x 10(35) erg s(-1), and outflow power (1.3-4.8) x 10(38) erg s(-1). We also find that all models with i >= 70 degrees fail at least two constraints, as do all models with equal ion and electron temperature; exploratory, nonthermal model sets tend to have higher 2.2 mu m flux density; and the population of cold electrons is limited by X-ray constraints due to the risk of bremsstrahlung overproduction. Finally, we discuss physical and numerical limitations of the models, highlighting the possible importance of kinetic effects and duration of the simulations.
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