Details

Autor(en) / Beteiligte

• Galison, Peter
• Akiyama, Kazunori
• Bintley, Dan
• Bower, Geoffrey C.
• Byun, Do-Young
• Carlstrom, John E.
• Chael, Andrew
• Chatterjee, Shami
• Chen, Yongjun
• Cheng, Xiaopeng
• Conway, John E.
• Cui, Yuzhu
• Dempsey, Jessica
• Dexter, Jason
• Fish, Vincent L.
• Ford, H. Alyson
• Georgiev, Boris
• Gurwell, Mark
• Hecht, Michael H.
• Ho, Luis C.
• Jiménez-Rosales, Alejandra
• Karami, Mansour
• Karuppusamy, Ramesh
• Kettenis, Mark
• Kim, Jongsoo
• Kocherlakota, Prashant
• Kramer, Carsten
• Kramer, Michael
• Kuo, Cheng-Yu
• Bella, Noemi La
• Lee, Sang-Sung
• Lindqvist, Michael
• Liu, Kuo
• Lonsdale, Colin J.
• Marrone, Daniel P.
• Marscher, Alan P.
• Matsushita, Satoki
• Matthews, Lynn D.
• Moriyama, Kotaro
• Myserlis, Ioannis
• Noutsos, Aristeidis
• Nowak, Michael A.
• Palumbo, Daniel C. M.
• Paraschos, Georgios Filippos
• Parsons, Harriet
• Porth, Oliver
• Pötzl, Felix M.
• Prather, Ben
• Ramakrishnan, Venkatessh
• Ricarte, Angelo
• Roelofs, Freek
• Romero-Cañizales, Cristina
• Roshanineshat, Arash
• Roy, Alan L.
• Rygl, Kazi L. J.
• Satapathy, Kaushik
• Schloerb, F. Peter
• Schonfeld, Jonathan
• Sohn, Bong Won
• Souccar, Kamal
• Turk, Matthew
• van Bemmel, Ilse
• Ward-Thompson, Derek
• Wielgus, Maciek
• Wong, George N.
• Zhang, Shuo
• Zhao, Guang-Yao
• Allardi, Alexander
• Amestica, Rodrigo
• Cárdenas, Mauricio
• Cantzler, Michael
• Caro, Patricio
• Chang, Dominic O.
• Chen, Chung-Chen
• Chilson, Ryan
• Ciechanowicz, Miroslaw
• Graham, Dave
• Heyminck, Stefan
• Hoge, James
• Hostler Schimpf, Shelbi R.
• Howie, Ryan E.
• Kwon, Caleb
• Martin-Cocher, Pierre
• Messias, Hugo
• Meyer-Zhao, Zheng
• Montenegro-Montes, Francisco
• Nishioka, Hiroaki
• Nystrom, George
• Phillips, Neil M.
• Pradel, Nicolas
• Rahlin, Alexandra S.
• Ressler, Sean
• Rodríguez-Montoya, Iván
• Santana, Jorge
• Silva, Kevin M.
• Torstensson, Karl
• Wieching, Gundolf
• Wijnands, Rudy
• Zeballos, Milagros

Titel

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

Ist Teil von

• Astrophysical journal. Letters, 2022-05, Vol.930 (2), p.L12

Ort / Verlag

Austin: The American Astronomical Society

Erscheinungsjahr

2022

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• Abstract 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 μ as (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 × 10 6 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 10 3 –10 5 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.