First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole
文献类型：期刊论文
| 作者 | Akiyama,Kazunori3,4,5,6; Alberdi,Antxon7; Alef,Walter8; Asada,Keiichi9; Azulay,Rebecca8,10,11; Baczko,Anne-Kathrin8; Ball,David12; Balokovi?,Mislav6,13; Barrett,John4; Bintley,Dan14 |
| 刊名 | The Astrophysical Journal Letters
 |
| 出版日期 | 2019-04-10 |
| 卷号 | 875期号:1 |
| ISSN号 | 2041-8205 |
| 关键词 | black hole physics galaxies: individual (M87) gravitation techniques: high angular resolution techniques: interferometric |
| DOI | 10.3847/2041-8213/ab1141 |
| 英文摘要 | Abstract We present measurements of the properties of the central radio source in M87 using Event Horizon Telescope data obtained during the 2017 campaign. We develop and fit geometric crescent models (asymmetric rings with interior brightness depressions) using two independent sampling algorithms that consider distinct representations of the visibility data. We show that the crescent family of models is statistically preferred over other comparably complex geometric models that we explore. We calibrate the geometric model parameters using general relativistic magnetohydrodynamic (GRMHD) models of the emission region and estimate physical properties of the source. We further fit images generated from GRMHD models directly to the data. We compare the derived emission region and black hole parameters from these analyses with those recovered from reconstructed images. There is a remarkable consistency among all methods and data sets. We find that >50% of the total flux at arcsecond scales comes from near the horizon, and that the emission is dramatically suppressed interior to this region by a factor >10, providing direct evidence of the predicted shadow of a black hole. Across all methods, we measure a crescent diameter of 42?±?3 μas and constrain its fractional width to be <0.5. Associating the crescent feature with the emission surrounding the black hole shadow, we infer an angular gravitational radius of GM/Dc2?=?3.8?±?0.4 μas. Folding in a distance measurement of gives a black hole mass of . This measurement from lensed emission near the event horizon is consistent with the presence of a central Kerr black hole, as predicted by the general theory of relativity. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:2041-8205-875-1-AB1141 |
| 源URL | [http://119.78.226.72/handle/331011/31829]  |
| 专题 | 中国科学院上海天文台 |
| 作者单位 | 1.Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, People’s Republic of China 2.ASTRON, Oude Hoogeveensedijk 4, 7991 PD Dwingeloo, The Netherlands 3.National Radio Astronomy Observatory, 520 Edgemont Rd, Charlottesville, VA 22903, USA 4.Massachusetts Institute of Technology Haystack Observatory, 99 Millstone Road, Westford, MA 01886, USA 5.National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan 6.Black Hole Initiative at Harvard University, 20 Garden Street, Cambridge, MA 02138, USA 7.Instituto de Astrofísica de Andalucía-CSIC, Glorieta de la Astronomía s/n, E-18008 Granada, Spain 8.Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany 9.Institute of Astronomy and Astrophysics, Academia Sinica, 11F of Astronomy-Mathematics Building, AS/NTU No. 1, Section 4, Roosevelt Rd, Taipei 10617, Taiwan, R.O.C. 10.Departament d’Astronomia i Astrofísica, Universitat de València, C. Dr. Moliner 50, E-46100 Burjassot, València, Spain |
| 推荐引用方式 GB/T 7714 | Akiyama,Kazunori,Alberdi,Antxon,Alef,Walter,et al. First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole[J]. The Astrophysical Journal Letters,2019,875(1). |
| APA | Akiyama,Kazunori.,Alberdi,Antxon.,Alef,Walter.,Asada,Keiichi.,Azulay,Rebecca.,...&Yamaguchi,Paul.(2019).First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole.The Astrophysical Journal Letters,875(1). |
| MLA | Akiyama,Kazunori,et al."First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole".The Astrophysical Journal Letters 875.1(2019). |
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