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, Kazunori1,2,3,4; Alberdi, Antxon5; Alef, Walter6; Asada, Keiichi7; Azulay, Rebecca6,8,9; Baczko, Anne-Kathrin6; Ball, David10,11; Balokovic, Mislav4,12; Barrett, John2; Bintley, Dan13 |
刊名 | ASTROPHYSICAL JOURNAL LETTERS |
出版日期 | 2019-04-10 |
卷号 | 875期号:1页码:44 |
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 |
通讯作者 | Akiyama, Kazunori() |
英文摘要 | 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 mu as 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/Dc(2) = 3.8 +/- 0.4 mu as. Folding in a distance measurement of 16.8(-0.7)(+0.8) gives a black hole mass of M = 6.5. 0.2 vertical bar(stat) +/- 0.7 vertical bar(sys) x 10(9) M-circle dot. 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. |
WOS关键词 | DIFFERENTIAL EVOLUTION ; GENETIC ALGORITHM ; ACCRETION DISKS ; INNER JET ; RADIO JET ; NUCLEUS ; GALAXY ; DISTRIBUTIONS ; EMISSION ; DISTANCE |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP PUBLISHING LTD |
WOS记录号 | WOS:000464210800006 |
源URL | [http://libir.pmo.ac.cn/handle/332002/24526] |
专题 | 中国科学院紫金山天文台 |
通讯作者 | Akiyama, Kazunori |
作者单位 | 1.Natl Radio Astron Observ, 520 Edgemont Rd, Charlottesville, VA 22903 USA 2.MIT, Haystack Observ, 99 Millstone Rd, Westford, MA 01886 USA 3.Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan 4.Harvard Univ, Black Hole Initiat, 20 Garden St, Cambridge, MA 02138 USA 5.CSIC, Inst Astrofis Andalucia, Glorieta Astron S-N, E-18008 Granada, Spain 6.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany 7.Acad Sinica, Inst Astron & Astrophys, 11F Astron Math Bldg,AS NTU 1,Sect 4,Roosevelt Rd, Taipei 10617, Taiwan 8.Univ Valencia, Dept Astron & Astrofis, C Dr Moliner 50, E-46100 Burjassot, Valencia, Spain 9.Univ Valencia, Observ Astron, C Catedratico Jose Beltran 2, E-46980 Valencia, Spain 10.Univ Arizona, Steward Observ, 933 N Cherry Ave, Tucson, AZ 85721 USA |
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]. ASTROPHYSICAL JOURNAL LETTERS,2019,875(1):44. |
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.ASTROPHYSICAL JOURNAL LETTERS,875(1),44. |
MLA | Akiyama, Kazunori,et al."First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole".ASTROPHYSICAL JOURNAL LETTERS 875.1(2019):44. |
入库方式: OAI收割
来源:紫金山天文台
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