First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring

doi:10.3847/2041-8213/ab0f43

	First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring
	Akiyama, Kazunori 1,2,3,4; Alberdi, Antxon 5; Alef, Walter 6; Asada, Keiichi 7; Azulay, Rebecca 6,8,9; Baczko, Anne-Kathrin 6; Ball, David 10,11; Balokovic, Mislav 4,12; Barrett, John 2; Bintley, Dan 13
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2019-04-10
卷号	875 期号:1 页码:31
关键词	accretion, accretion disks black hole physics galaxies: individual (M87) galaxies: jets magnetohydrodynamics (MHD) techniques: high angular resolution
ISSN号	2041-8205
DOI	10.3847/2041-8213/ab0f43
通讯作者	Akiyama, Kazunori()
英文摘要	The Event Horizon Telescope (EHT) has mapped the central compact radio source of the elliptical galaxy M87 at 1.3 mm with unprecedented angular resolution. Here we consider the physical implications of the asymmetric ring seen in the 2017 EHT data. To this end, we construct a large library of models based on general relativistic magnetohydrodynamic (GRMHD) simulations and synthetic images produced by general relativistic ray tracing. We compare the observed visibilities with this library and confirm that the asymmetric ring is consistent with earlier predictions of strong gravitational lensing of synchrotron emission from a hot plasma orbiting near the black hole event horizon. The ring radius and ring asymmetry depend on black hole mass and spin, respectively, and both are therefore expected to be stable when observed in future EHT campaigns. Overall, the observed image is consistent with expectations for the shadow of a spinning Kerr black hole as predicted by general relativity. If the black hole spin and M87's large scale jet are aligned, then the black hole spin vector is pointed away from Earth. Models in our library of non-spinning black holes are inconsistent with the observations as they do not produce sufficiently powerful jets. At the same time, in those models that produce a sufficiently powerful jet, the latter is powered by extraction of black hole spin energy through mechanisms akin to the Blandford-Znajek process. We briefly consider alternatives to a black hole for the central compact object. Analysis of existing EHT polarization data and data taken simultaneously at other wavelengths will soon enable new tests of the GRMHD models, as will future EHT campaigns at 230 and 345 GHz.
WOS关键词	RELATIVISTIC MAGNETOHYDRODYNAMIC SIMULATIONS ; ADVECTION-DOMINATED ACCRETION ; SUPERMASSIVE BLACK-HOLE ; SAGITTARIUS A-ASTERISK ; MAGNETICALLY DRIVEN ACCRETION ; GRMHD SIMULATIONS ; EDDINGTON ACCRETION ; JET FORMATION ; FLOWS ; DISKS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000464210800005
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/24598]
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,Sec 4,Roosevelt Rd, Taipei 10617, Taiwan 8.Univ Valencia, Dept Astron & Astrofis, C Dr Moliner 50, E-46100 Valencia, Spain 9.Univ Valencia, Observ Astron, C Catedrat 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. V. Physical Origin of the Asymmetric Ring[J]. ASTROPHYSICAL JOURNAL LETTERS,2019,875(1):31.
APA	Akiyama, Kazunori.,Alberdi, Antxon.,Alef, Walter.,Asada, Keiichi.,Azulay, Rebecca.,...&Zhang, Shuo.(2019).First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring.ASTROPHYSICAL JOURNAL LETTERS,875(1),31.
MLA	Akiyama, Kazunori,et al."First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring".ASTROPHYSICAL JOURNAL LETTERS 875.1(2019):31.