The Shadow of a Spherically Accreting Black Hole

被引：189

作者：

Narayan, Ramesh ^{[1
]}

Johnson, Michael D. ^{[1
]}

Gammie, Charles F. ^{[2
,3
]}

机构：

[1] Harvard & Smithsonian, Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA

[2] Univ Illinois, Dept Phys, 1110 West Green St, Urbana, IL 61801 USA

[3] Univ Illinois, Dept Astron, 1002 West Green St, Urbana, IL 61801 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2019年 / 885卷 / 02期

基金：

美国国家科学基金会;

关键词：

RELATIVISTIC RADIATIVE POSTPROCESSOR;

D O I：

10.3847/2041-8213/ab518c

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We explore a simple spherical model of optically thin accretion on a Schwarzschild black hole, and study the properties of the image as seen by a distant observer. We show that a dark circular region in the center?a shadow?is always present. The outer edge of the shadow is located at the photon ring radius <CDATA<i, where M. The location of the shadow edge is independent of the inner radius at which the accreting gas stops radiating. The size of the observed shadow is thus a signature of the spacetime geometry and it is hardly influenced by accretion details. We briefly discuss the relevance of these results for the Event Horizon Telescope image of the supermassive black hole in M87.

引用

页数：6

共 13 条

[1] First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole [J].

Akiyama, Kazunori ;

Alberdi, Antxon ;

Alef, Walter ;

Asada, Keiichi ;

Azulay, Rebecca ;

Baczko, Anne-Kathrin ;

Ball, David ;

Balokovic, Mislav ;

Barrett, John ;

Bintley, Dan ;

Blackburn, Lindy ;

Boland, Wilfred ;

Bouman, Katherine L. ;

Bower, Geoffrey C. ;

Bremer, Michael ;

Brinkerink, Christiaan D. ;

Brissenden, Roger ;

Britzen, Silke ;

Broderick, Avery E. ;

Broguiere, Dominique ;

Bronzwaer, Thomas ;

Byun, Do-Young ;

Carlstrom, John E. ;

Chael, Andrew ;

Chan, Chi-kwan ;

Chatterjee, Shami ;

Chatterjee, Koushik ;

Chen, Ming-Tang ;

Chen, Yongjun ;

Cho, Ilje ;

Christian, Pierre ;

Conway, John E. ;

Cordes, James M. ;

Crew, Geoffrey B. ;

Cui, Yuzhu ;

Davelaar, Jordy ;

De Laurentis, Mariafelicia ;

Deane, Roger ;

Dempsey, Jessica ;

Desvignes, Gregory ;

Dexter, Jason ;

Doeleman, Sheperd S. ;

Eatough, Ralph P. ;

Falcke, Heino ;

Fish, Vincent L. ;

Fomalont, Ed ;

Fraga-Encinas, Raquel ;

Freeman, William T. ;

Friberg, Per ;

Fromm, Christian M. .

ASTROPHYSICAL JOURNAL LETTERS, 2019, 875 (01)

[2]

Bardeen J. M., 1973, BLACK HOLES, V215

[3] THE GRAVITY FIELD OF A PARTICLE [J].

DARWIN, C .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1959, 249 (1257) :180-194

[4] Viewing the shadow of the black hole at the Galactic center [J].

Falcke, H ;

Melia, F ;

Agol, E .

ASTROPHYSICAL JOURNAL, 2000, 528 (01) :L13-L16

[5] Black hole shadows, photon rings, and lensing rings [J].

Gralla, Samuel E. ;

Holz, Daniel E. ;

Wald, Robert M. .

PHYSICAL REVIEW D, 2019, 100 (02)

[6]

Jaroszynski M, 1997, ASTRON ASTROPHYS, V326, P419

[7]

Johnson M. D., 2019, SCIA

[8]

LUMINET JP, 1979, ASTRON ASTROPHYS, V75, P228

[9] HEROIC: 3D general relativistic radiative post-processor with comptonization for black hole accretion discs [J].

Narayan, Ramesh ;

Zhu, Yucong ;

Psaltis, Dimitrios ;

Sadowski, Aleksander .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2016, 457 (01) :608-628

[10] Observable Emission Features of Black Hole GRMHD Jets on Event Horizon Scales [J].

Pu, Hung-Yi ;

Wu, Kinwah ;

Younsi, Ziri ;

Asada, Keiichi ;

Mizuno, Yosuke ;

Nakamura, Masanori .

ASTROPHYSICAL JOURNAL, 2017, 845 (02)

← 1 2 →