First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way

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; Laurentis, Mariafelicia De; 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. 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; Bella, Noemi La; 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; Fuentes, Santiago Navarro; 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 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 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 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; Yuan, Ye-Fei; Zensus, J. Anton; Zhang, Shuo; Zhao, Guang-Yao; Zhao, Shan-Shan; Agurto, Claudio; Allardi, Alexander; Amestica, Rodrigo; Araneda, Juan Pablo; Arriagada, Oriel; Berghuis, Jennie L.; Bertarini, Alessandra; Berthold, Ryan; Blanchard, Jay; Brown, Ken; Cárdenas, Mauricio; Cantzler, Michael; Caro, Patricio; Castillo-Domínguez, Edgar; Chan, Tin Lok; Chang, Chih-Cheng; Chang, Dominic O.; Chang, Shu-Hao; Chang, Song-Chu; Chen, Chung-Chen; Chilson, Ryan; Chuter, Tim C.; Ciechanowicz, Miroslaw; Colin-Beltran, Edgar; Coulson, Iain M.; Crowley, Joseph; Degenaar, Nathalie; Dornbusch, Sven; Durán, Carlos A.; Everett, Wendeline B.; Faber, Aaron; Forster, Karl; Fuchs, Miriam M.; Gale, David M.; Geertsema, Gertie; González, Edouard; Graham, Dave; Gueth, Frédéric; Halverson, Nils W.; Han, Chih-Chiang; Han, Kuo-Chang; Hasegawa, Yutaka; Hernández-Rebollar, José Luis; Herrera, Cristian; Herrero-Illana, Ruben; Heyminck, Stefan; Hirota, Akihiko; Hoge, James; Hostler Schimpf, Shelbi R.; Howie, Ryan E.; Huang, Yau-De; Jiang, Homin; Jinchi, Hao; John, David; Kimura, Kimihiro; Klein, Thomas; Kubo, Derek; Kuroda, John; Kwon, Caleb; Lacasse, Richard; Laing, Robert; Leitch, Erik M.; Li, Chao-Te; Liu, Ching-Tang; Liu, Kuan-Yu; Lin, Lupin C.-C.; Lu, Li-Ming; Mac-Auliffe, Felipe; Martin-Cocher, Pierre; Matulonis, Callie; Maute, John K.; Messias, Hugo; Meyer-Zhao, Zheng; Montaña, Alfredo; Montenegro-Montes, Francisco; Montgomerie, William; Moreno Nolasco, Marcos Emir; Muders, Dirk; Nishioka, Hiroaki; Norton, Timothy J.; Nystrom, George; Ogawa, Hideo; Olivares, Rodrigo; Oshiro, Peter; Pérez-Beaupuits, Juan Pablo; Parra, Rodrigo; Phillips, Neil M.; Poirier, Michael; Pradel, Nicolas; Qiu, Richard; Raffin, Philippe A.; Rahlin, Alexandra S.; Ramírez, Jorge; Ressler, Sean; Reynolds, Mark; Rodríguez-Montoya, Iván; Saez-Madain, Alejandro F.; Santana, Jorge; Shaw, Paul; Shirkey, Leslie E.; Silva, Kevin M.; Snow, William; Sousa, Don; Sridharan, T. K.; Stahm, William; Stark, Anthony A.; Test, John; Torstensson, Karl; Venegas, Paulina; Walther, Craig; Wei, Ta-Shun; White, Chris; Wieching, Gundolf; Wijnands, Rudy; Wouterloot, Jan A.; Yu, Chen-Yu; Yu (于威), Wei; Zeballos, Milagros

doi:10.3847/2041-8213/ac6674

Journal Article · Thu May 12 00:00:00 EDT 2022 · The Astrophysical Journal. Letters

DOI:https://doi.org/10.3847/2041-8213/ac6674· OSTI ID:1868453

We present the first Event Horizon Telescope (EHT) observations of Sagittarius A* (Sgr A*), the Galactic center source associated with a supermassive black hole. These observations were conducted in 2017 using a global interferometric array of eight telescopes operating at a wavelength of λ = 1.3 mm. The EHT data resolve a compact emission region with intrahour variability. A variety of imaging and modeling analyses all support an image that is dominated by a bright, thick ring with a diameter of 51.8 ± 2.3 μas (68% credible interval). The ring has modest azimuthal brightness asymmetry and a comparatively dim interior. Using a large suite of numerical simulations, we demonstrate that the EHT images of Sgr A* are consistent with the expected appearance of a Kerr black hole with mass ~4 × 10⁶ M_⊙, which is inferred to exist at this location based on previous infrared observations of individual stellar orbits, as well as maser proper-motion studies. Our model comparisons disfavor scenarios where the black hole is viewed at high inclination (i > 50°), as well as nonspinning black holes and those with retrograde accretion disks. Our results provide direct evidence for the presence of a supermassive black hole at the center of the Milky Way, and for the first time we connect the predictions from dynamical measurements of stellar orbits on scales of 10³–10⁵ gravitational radii to event-horizon-scale images and variability. Furthermore, a comparison with the EHT results for the supermassive black hole M87* shows consistency with the predictions of general relativity spanning over three orders of magnitude in central mass.

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A star in a 15.2-year orbit around the supermassive black hole at the centre of the Milky Way Schödel, R.; Ott, T.; Genzel, R. Nature, Vol. 419, Issue 6908 https://doi.org/10.1038/nature01121	journal	October 2002
The Effects of Tilt on the Time Variability of Millimeter and Infrared Emission from Sagittarius A* White, Christopher J.; Quataert, Eliot The Astrophysical Journal, Vol. 926, Issue 2 https://doi.org/10.3847/1538-4357/ac423c	journal	February 2022
Measuring Distance and Properties of the Milky Way’s Central Supermassive Black Hole with Stellar Orbits Ghez, A. M.; Salim, S.; Weinberg, N. N. The Astrophysical Journal, Vol. 689, Issue 2 https://doi.org/10.1086/592738	journal	December 2008
Metric for rapidly spinning black holes suitable for strong-field tests of the no-hair theorem Johannsen, Tim; Psaltis, Dimitrios Physical Review D, Vol. 83, Issue 12 https://doi.org/10.1103/PhysRevD.83.124015	journal	June 2011
On the fate of gas accreting at a low rate on to a black hole Blandford, R. D.; Begelman, M. C. Monthly Notices of the Royal Astronomical Society, Vol. 303, Issue 1 https://doi.org/10.1046/j.1365-8711.1999.02358.x	journal	February 1999
Identification of Cygnus X-1 with HDE 226868 Bolton, C. T. Nature, Vol. 235, Issue 5336 https://doi.org/10.1038/235271b0	journal	February 1972
The Scattering and Intrinsic Structure of Sagittarius A* at Radio Wavelengths Johnson, Michael D.; Narayan, Ramesh; Psaltis, Dimitrios The Astrophysical Journal, Vol. 865, Issue 2 https://doi.org/10.3847/1538-4357/aadcff	journal	September 2018
First simultaneous NIR/X-ray detection of a flare from Sgr A* Eckart, A.; Baganoff, F. K.; Morris, M. Astronomy & Astrophysics, Vol. 427, Issue 1 https://doi.org/10.1051/0004-6361:20040495	journal	October 2004
The black hole binary A0620-00 McClintock, J. E.; Remillard, R. A. The Astrophysical Journal, Vol. 308 https://doi.org/10.1086/164482	journal	September 1986
First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter The Astrophysical Journal, Vol. 875, Issue 1 https://doi.org/10.3847/2041-8213/ab1141	journal	April 2019
Intrinsic Size of Sagittarius A*: 72 Schwarzschild Radii Lo, K. Y.; Shen, Zhi-Qiang; Zhao, Jun-Hui The Astrophysical Journal, Vol. 508, Issue 1 https://doi.org/10.1086/311726	journal	November 1998
How to tell an accreting boson star from a black hole Olivares, Hector; Younsi, Ziri; Fromm, Christian M. Monthly Notices of the Royal Astronomical Society, Vol. 497, Issue 1 https://doi.org/10.1093/mnras/staa1878	journal	July 2020
The First Measurement of Spectral Lines in a Short-Period Star Bound to the Galaxy’s Central Black Hole: A Paradox of Youth Ghez, A. M.; Duchêne, G.; Matthews, K. The Astrophysical Journal, Vol. 586, Issue 2 https://doi.org/10.1086/374804	journal	April 2003
Resolved magnetic-field structure and variability near the event horizon of Sagittarius A Johnson, M. D.; Fish, V. L.; Doeleman, S. S. Science, Vol. 350, Issue 6265 https://doi.org/10.1126/science.aac7087	journal	December 2015
Observation of Gravitational Waves from a Binary Black Hole Merger Abbott, B. P.; Abbott, R.; Abbott, T. D. Physical Review Letters, Vol. 116, Issue 6 https://doi.org/10.1103/PhysRevLett.116.061102	journal	February 2016
A size of ∼1 au for the radio source Sgr A* at the centre of the Milky Way Shen, Zhi-Qiang; Lo, K. Y.; Liang, M. -C. Nature, Vol. 438, Issue 7064 https://doi.org/10.1038/nature04205	journal	November 2005
Class of Stationary Axisymmetric Solutions of the Einstein-Maxwell-Dilaton-Axion Field Equations García, Alberto; Galtsov, Dmitri; Kechkin, Oleg Physical Review Letters, Vol. 74, Issue 8 https://doi.org/10.1103/PhysRevLett.74.1276	journal	February 1995
Millimeter Flares and vlbi Visibilities from Relativistic Simulations of Magnetized Accretion onto the Galactic Center Black hole Dexter, Jason; Agol, Eric; Fragile, P. Chris The Astrophysical Journal, Vol. 703, Issue 2 https://doi.org/10.1088/0004-637X/703/2/L142	journal	September 2009
The Simultaneous Spectrum of Sagittarius A* from 20 Centimeters to 1 Millimeter and the Nature of the Millimeter Excess Falcke, Heino; Goss, W. M.; Matsuo, Hiroshi The Astrophysical Journal, Vol. 499, Issue 2 https://doi.org/10.1086/305687	journal	June 1998
Magnetically Arrested Disk: an Energetically Efficient Accretion Flow: Fig. 1 Narayan, Ramesh; Igumenshchev, Igor V.; Abramowicz, Marek A. Publications of the Astronomical Society of Japan, Vol. 55, Issue 6 https://doi.org/10.1093/pasj/55.6.L69	journal	December 2003
Radio Sources in Low‐Luminosity Active Galactic Nuclei. I. VLA Detections of Compact, Flat‐Spectrum Cores Nagar, Neil M.; Falcke, Heino; Wilson, Andrew S. The Astrophysical Journal, Vol. 542, Issue 1 https://doi.org/10.1086/309524	journal	October 2000
Mass distribution in the Galactic Center based on interferometric astrometry of multiple stellar orbits Abuter, R.; Aimar, N.; Amorim, A. Astronomy & Astrophysics, Vol. 657 https://doi.org/10.1051/0004-6361/202142465	journal	January 2022
ESTIMATING THE PARAMETERS OF SAGITTARIUS A*'s ACCRETION FLOW VIA MILLIMETER VLBI Broderick, Avery E.; Fish, Vincent L.; Doeleman, Sheperd S. The Astrophysical Journal, Vol. 697, Issue 1 https://doi.org/10.1088/0004-637X/697/1/45	journal	April 2009
1.3 mm WAVELENGTH VLBI OF SAGITTARIUS A*: DETECTION OF TIME-VARIABLE EMISSION ON EVENT HORIZON SCALES Fish, Vincent L.; Doeleman, Sheperd S.; Beaudoin, Christopher The Astrophysical Journal, Vol. 727, Issue 2 https://doi.org/10.1088/2041-8205/727/2/L36	journal	January 2011
THEMIS: A Parameter Estimation Framework for the Event Horizon Telescope Broderick, Avery E.; Gold, Roman; Karami, Mansour The Astrophysical Journal, Vol. 897, Issue 2 https://doi.org/10.3847/1538-4357/ab91a4	journal	July 2020
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rPICARD: A CASA-based calibration pipeline for VLBI data: Calibration and imaging of 7 mm VLBA observations of the AGN jet in M 87 Janssen, M.; Goddi, C.; van Bemmel, I. M. Astronomy & Astrophysics, Vol. 626 https://doi.org/10.1051/0004-6361/201935181	journal	June 2019
Explaining the spectrum of Sagittarius A* with a model of an accreting black hole Narayan, Ramesh; Yi, Insu; Mahadevan, Rohan Nature, Vol. 374, Issue 6523 https://doi.org/10.1038/374623a0	journal	April 1995
Cygnus X-1—a Spectroscopic Binary with a Heavy Companion ? Webster, B. Louise; Murdin, Paul Nature, Vol. 235, Issue 5332 https://doi.org/10.1038/235037a0	journal	January 1972
Characterizing and Mitigating Intraday Variability: Reconstructing Source Structure in Accreting Black Holes with mm-VLBI Broderick, Avery E.; Gold, Roman; Georgiev, Boris The Astrophysical Journal Letters, Vol. 930, Issue 2 https://doi.org/10.3847/2041-8213/ac6584	journal	May 2022
Intense sub-arcsecond structure in the galactic center Balick, B.; Brown, R. L. The Astrophysical Journal, Vol. 194 https://doi.org/10.1086/153242	journal	December 1974
GRMHD simulations of magnetized advection-dominated accretion on a non-spinning black hole: role of outflows: Magnetized advection-dominated accretion Narayan, Ramesh; Sądowski, Aleksander; Penna, Robert F. Monthly Notices of the Royal Astronomical Society, Vol. 426, Issue 4 https://doi.org/10.1111/j.1365-2966.2012.22002.x	journal	October 2012
The Variability of the Black Hole Image in M87 at the Dynamical Timescale Satapathy, Kaushik; Psaltis, Dimitrios; Özel, Feryal The Astrophysical Journal, Vol. 925, Issue 1 https://doi.org/10.3847/1538-4357/ac332e	journal	January 2022
HARM: A Numerical Scheme for General Relativistic Magnetohydrodynamics Gammie, Charles F.; McKinney, Jonathan C.; Toth, Gabor The Astrophysical Journal, Vol. 589, Issue 1 https://doi.org/10.1086/374594	journal	May 2003
The Orbit of the star s2 Around sgr a* from very Large Telescope and keck data Gillessen, S.; Eisenhauer, F.; Fritz, T. K. The Astrophysical Journal, Vol. 707, Issue 2 https://doi.org/10.1088/0004-637X/707/2/L114	journal	December 2009
The Linear Polarization of Sagittarius A*. I. VLA Spectropolarimetry at 4.8 and 8.4 GHz Bower, Geoffrey C.; Backer, Donald C.; Zhao, Jun‐Hui The Astrophysical Journal, Vol. 521, Issue 2 https://doi.org/10.1086/307592	journal	August 1999
Interferometric Measurements of Variable 340 GHz Linear Polarization in Sagittarius A* Marrone, Daniel P.; Moran, James M.; Zhao, Jun‐Hui The Astrophysical Journal, Vol. 640, Issue 1 https://doi.org/10.1086/500106	journal	March 2006
Constraining the Accretion Rate onto Sagittarius A* Using Linear Polarization Quataert, Eliot; Gruzinov, Andrei The Astrophysical Journal, Vol. 545, Issue 2 https://doi.org/10.1086/317845	journal	December 2000
First M87 Event Horizon Telescope Results. II. Array and Instrumentation Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter The Astrophysical Journal, Vol. 875, Issue 1 https://doi.org/10.3847/2041-8213/ab0c96	journal	April 2019
Gravitational Test beyond the First Post-Newtonian Order with the Shadow of the M87 Black Hole Psaltis, Dimitrios; Medeiros, Lia; Christian, Pierre Physical Review Letters, Vol. 125, Issue 14 https://doi.org/10.1103/PhysRevLett.125.141104	journal	October 2020
Sagittarius A* Polarization: No Advection-dominated Accretion Flow, Low Accretion Rate, and Nonthermal Synchrotron Emission Agol, Eric The Astrophysical Journal, Vol. 538, Issue 2 https://doi.org/10.1086/312818	journal	August 2000
On Continued Gravitational Contraction Oppenheimer, J. R.; Snyder, H. Physical Review, Vol. 56, Issue 5 https://doi.org/10.1103/PhysRev.56.455	journal	September 1939
Viewing the Shadow of the Black Hole at the Galactic Center Falcke, Heino; Melia, Fulvio; Agol, Eric The Astrophysical Journal, Vol. 528, Issue 1 https://doi.org/10.1086/312423	journal	January 2000
Convection‐dominated Accretion Flows Quataert, Eliot; Gruzinov, Andrei The Astrophysical Journal, Vol. 539, Issue 2 https://doi.org/10.1086/309267	journal	August 2000
Self‐similar Accretion Flows with Convection Narayan, Ramesh; Igumenshchev, Igor V.; Abramowicz, Marek A. The Astrophysical Journal, Vol. 539, Issue 2 https://doi.org/10.1086/309268	journal	August 2000
Coevolution (Or Not) of Supermassive Black Holes and Host Galaxies Kormendy, John; Ho, Luis C. Annual Review of Astronomy and Astrophysics, Vol. 51, Issue 1 https://doi.org/10.1146/annurev-astro-082708-101811	journal	August 2013
Ab Initio Horizon-scale Simulations of Magnetically Arrested Accretion in Sagittarius A* Fed by Stellar Winds Ressler, Sean M.; White, Christopher J.; Quataert, Eliot The Astrophysical Journal, Vol. 896, Issue 1 https://doi.org/10.3847/2041-8213/ab9532	journal	June 2020
Possible evidence against a massive black hole at the Galactic Centre Goldwurm, A.; Cordier, B.; Paul, J. Nature, Vol. 371, Issue 6498 https://doi.org/10.1038/371589a0	journal	October 1994
Rapid X-ray flaring from the direction of the supermassive black hole at the Galactic Centre Baganoff, F. K.; Bautz, M. W.; Brandt, W. N. Nature, Vol. 413, Issue 6851 https://doi.org/10.1038/35092510	journal	September 2001
First Sagittarius A* Event Horizon Telescope Results. IV. Variability, Morphology, and Black Hole Mass Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter The Astrophysical Journal Letters, Vol. 930, Issue 2 https://doi.org/10.3847/2041-8213/ac6736	journal	May 2022
Selective Dynamical Imaging of Interferometric Data Farah, Joseph; Galison, Peter; Akiyama, Kazunori The Astrophysical Journal Letters, Vol. 930, Issue 2 https://doi.org/10.3847/2041-8213/ac6615	journal	May 2022
The Proper Motion of Sagittarius A*. III. The Case for a Supermassive Black Hole Reid, M. J.; Brunthaler, A. The Astrophysical Journal, Vol. 892, Issue 1 https://doi.org/10.3847/1538-4357/ab76cd	journal	March 2020
First M87 Event Horizon Telescope Results. VII. Polarization of the Ring Akiyama, Kazunori; Algaba, Juan Carlos; Alberdi, Antxon The Astrophysical Journal Letters, Vol. 910, Issue 1 https://doi.org/10.3847/2041-8213/abe71d	journal	March 2021
Gravitational Field of a Spinning Mass as an Example of Algebraically Special Metrics Kerr, Roy P. Physical Review Letters, Vol. 11, Issue 5 https://doi.org/10.1103/PhysRevLett.11.237	journal	September 1963
Radiative Models of sgr a* from Grmhd Simulations Mościbrodzka, Monika; Gammie, Charles F.; Dolence, Joshua C. The Astrophysical Journal, Vol. 706, Issue 1 https://doi.org/10.1088/0004-637X/706/1/497	journal	November 2009
Advection-dominated accretion and the black hole event horizon Narayan, Ramesh; McClintock, Jeffrey E. New Astronomy Reviews, Vol. 51, Issue 10-12 https://doi.org/10.1016/j.newar.2008.03.002	journal	May 2008
Relativistic redshift of the star S0-2 orbiting the Galactic Center supermassive black hole Do, Tuan; Hees, Aurelien; Ghez, Andrea Science, Vol. 365, Issue 6454 https://doi.org/10.1126/science.aav8137	journal	August 2019
Relativistic jets as compact radio sources Blandford, R. D.; Konigl, A. The Astrophysical Journal, Vol. 232 https://doi.org/10.1086/157262	journal	August 1979
Chandra X‐Ray Spectroscopic Imaging of Sagittarius A* and the Central Parsec of the Galaxy Baganoff, F. K.; Maeda, Y.; Morris, M. The Astrophysical Journal, Vol. 591, Issue 2 https://doi.org/10.1086/375145	journal	July 2003
The Spectral Energy Distributions of Low‐Luminosity Active Galactic Nuclei Ho, Luis C. The Astrophysical Journal, Vol. 516, Issue 2 https://doi.org/10.1086/307137	journal	May 1999
First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter The Astrophysical Journal, Vol. 875, Issue 1 https://doi.org/10.3847/2041-8213/ab0ec7	journal	April 2019
Detection of the gravitational redshift in the orbit of the star S2 near the Galactic centre massive black hole Abuter, R.; Amorim, A.; Anugu, N. Astronomy & Astrophysics, Vol. 615 https://doi.org/10.1051/0004-6361/201833718	journal	July 2018
A geometric distance measurement to the Galactic center black hole with 0.3% uncertainty Abuter, R.; Amorim, A.; Bauböck, M. Astronomy & Astrophysics, Vol. 625 https://doi.org/10.1051/0004-6361/201935656	journal	May 2019
General relativistic magnetohydrodynamical simulations of the jet in M 87 Mościbrodzka, Monika; Falcke, Heino; Shiokawa, Hotaka Astronomy & Astrophysics, Vol. 586 https://doi.org/10.1051/0004-6361/201526630	journal	January 2016
Detection of Intrinsic Source Structure at ∼3 Schwarzschild Radii with Millimeter-VLBI Observations of SAGITTARIUS A* Lu, Ru-Sen; Krichbaum, Thomas P.; Roy, Alan L. The Astrophysical Journal, Vol. 859, Issue 1 https://doi.org/10.3847/1538-4357/aabe2e	journal	May 2018
Hybrid Thermal‐Nonthermal Synchrotron Emission from Hot Accretion Flows Ozel, Feryal; Psaltis, Dimitrios; Narayan, Ramesh The Astrophysical Journal, Vol. 541, Issue 1 https://doi.org/10.1086/309396	journal	September 2000
Accretion Disk Evolution with Wind Infall. II. Results of Three‐dimensional Hydrodynamical Simulations with an Illustrative Application to Sagittarius A* Coker, Robert; Melia, Fulvio; Falcke, Heino The Astrophysical Journal, Vol. 523, Issue 2 https://doi.org/10.1086/307770	journal	October 1999
Detection of the Intrinsic Size of Sagittarius A* Through Closure Amplitude Imaging Bower, Geoffrey C.; Falcke, Heino; Herrnstein, Robeson M. Science, Vol. 304, Issue 5671 https://doi.org/10.1126/science.1094023	journal	April 2004
Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign Algaba, J. C.; Anczarski, J.; Asada, K. The Astrophysical Journal Letters, Vol. 911, Issue 1 https://doi.org/10.3847/2041-8213/abef71	journal	April 2021
First M87 Event Horizon Telescope Results. III. Data Processing and Calibration Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter The Astrophysical Journal, Vol. 875, Issue 1 https://doi.org/10.3847/2041-8213/ab0c57	journal	April 2019
Near-infrared flares from accreting gas around the supermassive black hole at the Galactic Centre Genzel, R.; Schödel, R.; Ott, T. Nature, Vol. 425, Issue 6961 https://doi.org/10.1038/nature02065	journal	October 2003
Modelling the thermal X-ray emission around the Galactic Centre from colliding Wolf–Rayet winds Russell, Christopher M. P.; Wang, Q. Daniel; Cuadra, Jorge Monthly Notices of the Royal Astronomical Society, Vol. 464, Issue 4 https://doi.org/10.1093/mnras/stw2584	journal	October 2016
THE POWER OF IMAGING: CONSTRAINING THE PLASMA PROPERTIES OF GRMHD SIMULATIONS USING EHT OBSERVATIONS OF Sgr A* Chan, Chi-Kwan; Psaltis, Dimitrios; Özel, Feryal The Astrophysical Journal, Vol. 799, Issue 1 https://doi.org/10.1088/0004-637X/799/1/1	journal	January 2015
VLBI observations of the compact radio source in the center of the Galaxy Lo, K. Y.; Schilizzi, R. T.; Cohen, M. H. The Astrophysical Journal, Vol. 202 https://doi.org/10.1086/181982	journal	December 1975
First Sagittarius A* Event Horizon Telescope Results. V. Testing Astrophysical Models of the Galactic Center Black Hole Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter The Astrophysical Journal Letters, Vol. 930, Issue 2 https://doi.org/10.3847/2041-8213/ac6672	journal	May 2022
Distinguishing black holes from naked singularities through their accretion disc properties Joshi, Pankaj S.; Malafarina, Daniele; Narayan, Ramesh Classical and Quantum Gravity, Vol. 31, Issue 1 https://doi.org/10.1088/0264-9381/31/1/015002	journal	November 2013
223 GHz VLBI observations of 3C 273 Padin, S.; Woody, D. P.; Hodges, M. W. The Astrophysical Journal, Vol. 360 https://doi.org/10.1086/185800	journal	September 1990
A Universal Power-law Prescription for Variability from Synthetic Images of Black Hole Accretion Flows Georgiev, Boris; Pesce, Dominic W.; Broderick, Avery E. The Astrophysical Journal Letters, Vol. 930, Issue 2 https://doi.org/10.3847/2041-8213/ac65eb	journal	May 2022
First Sagittarius A* Event Horizon Telescope Results. II. EHT and Multiwavelength Observations, Data Processing, and Calibration Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter The Astrophysical Journal Letters, Vol. 930, Issue 2 https://doi.org/10.3847/2041-8213/ac6675	journal	May 2022
An Unambiguous Detection of Faraday Rotation in Sagittarius A* Marrone, Daniel P.; Moran, James M.; Zhao, Jun-Hui The Astrophysical Journal, Vol. 654, Issue 1 https://doi.org/10.1086/510850	journal	December 2006
The Nature of the 10 kilosecond X-ray flare in Sgr A* Markoff, S.; Falcke, H.; Yuan, F. Astronomy & Astrophysics, Vol. 379, Issue 1 https://doi.org/10.1051/0004-6361:20011346	journal	November 2001
The Demography of Massive Dark Objects in Galaxy Centers Magorrian, John; Tremaine, Scott; Richstone, Douglas The Astronomical Journal, Vol. 115, Issue 6 https://doi.org/10.1086/300353	journal	June 1998
A Thermal Bremsstrahlung Model for the Quiescent X‐Ray Emission from Sagittarius A* Quataert, Eliot The Astrophysical Journal, Vol. 575, Issue 2 https://doi.org/10.1086/341425	journal	August 2002
First M87 Event Horizon Telescope Results. VIII. Magnetic Field Structure near The Event Horizon Akiyama, Kazunori; Algaba, Juan Carlos; Alberdi, Antxon The Astrophysical Journal Letters, Vol. 910, Issue 1 https://doi.org/10.3847/2041-8213/abe4de	journal	March 2021
Galactic Nuclei as Collapsed Old Quasars Lynden-Bell, D. Nature, Vol. 223, Issue 5207 https://doi.org/10.1038/223690a0	journal	August 1969
3C 273 : A Star-Like Object with Large Red-Shift Schmidt, M. Nature, Vol. 197, Issue 4872 https://doi.org/10.1038/1971040a0	journal	March 1963
Disks as Inhomogeneous, Anisotropic Gaussian Random Fields Lee, Daeyoung; Gammie, Charles F. The Astrophysical Journal, Vol. 906, Issue 1 https://doi.org/10.3847/1538-4357/abc8f3	journal	January 2021
The Intrinsic Size of Sagittarius A* from 0.35 to 6 cm Bower, Geoffrey C.; Goss, W. M.; Falcke, Heino The Astrophysical Journal, Vol. 648, Issue 2 https://doi.org/10.1086/508019	journal	August 2006
Observational Evidence of Active Galactic Nuclei Feedback Fabian, A. C. Annual Review of Astronomy and Astrophysics, Vol. 50, Issue 1 https://doi.org/10.1146/annurev-astro-081811-125521	journal	September 2012
On the Nature of the Compact Dark Mass at the Galactic Center Broderick, Avery E.; Narayan, Ramesh The Astrophysical Journal, Vol. 638, Issue 1 https://doi.org/10.1086/500930	journal	January 2006
Trigonometric Parallaxes of High-mass Star-forming Regions: Our View of the Milky Way Reid, M. J.; Menten, K. M.; Brunthaler, A. The Astrophysical Journal, Vol. 885, Issue 2 https://doi.org/10.3847/1538-4357/ab4a11	journal	November 2019
Formation of precessing jets by tilted black hole discs in 3D general relativistic MHD simulations Liska, M.; Hesp, C.; Tchekhovskoy, A. Monthly Notices of the Royal Astronomical Society: Letters, Vol. 474, Issue 1 https://doi.org/10.1093/mnrasl/slx174	journal	October 2017
First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter The Astrophysical Journal, Vol. 875, Issue 1 https://doi.org/10.3847/2041-8213/ab0f43	journal	April 2019
Interferometric Detection of Linear Polarization from Sagittarius A* at 230 GHz Bower, Geoffrey C.; Wright, Melvyn C. H.; Falcke, Heino The Astrophysical Journal, Vol. 588, Issue 1 https://doi.org/10.1086/373989	journal	May 2003
Event-horizon-scale structure in the supermassive black hole candidate at the Galactic Centre Doeleman, Sheperd S.; Weintroub, Jonathan; Rogers, Alan E. E. Nature, Vol. 455, Issue 7209 https://doi.org/10.1038/nature07245	journal	September 2008
Hot Accretion Flows Around Black Holes Yuan, Feng; Narayan, Ramesh Annual Review of Astronomy and Astrophysics, Vol. 52, Issue 1 https://doi.org/10.1146/annurev-astro-082812-141003	journal	August 2014

Title: First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way

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Title: First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way

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