Black hole shadow in an expanding universe with a cosmological constant

被引：145

作者：

Perlick, Volker ^{[1
]}

Tsupko, Oleg Yu. ^{[2
]}

Bisnovatyi-Kogan, Gennady S. ^{[2
,3
]}

机构：

[1] Univ Bremen, ZARM, D-28359 Bremen, Germany

[2] Russian Acad Sci, Space Res Inst, Profsoyuznaya 84-32, Moscow 117997, Russia

[3] Natl Res Nucl Univ MEPhI, Moscow Engn Phys Inst, Kashirskoe Shosse 31, Moscow 115409, Russia

来源：

PHYSICAL REVIEW D | 2018年 / 97卷 / 10期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1103/PhysRevD.97.104062

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analytically investigate the influence of a cosmic expansion on the shadow of the Schwarzschild black hole. We suppose that the expansion is driven by a cosmological constant only and use the Kottler (or Schwarzschild-de Sitter) spacetime as a model for a Schwarzschild black hole embedded in a de Sitter universe. We calculate the angular radius of the shadow for an observer who is comoving with the cosmic expansion. It is found that the angular radius of the shadow shrinks to a nonzero finite value if the comoving observer approaches infinity.

引用

页数：11

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