Black hole shadow in an expanding universe with a cosmological constant

Volker Perlick, Oleg Yu. Tsupko, and Gennady S. Bisnovatyi-Kogan
Phys. Rev. D 97, 104062 – Published 29 May 2018

Abstract

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.

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  • Received 13 April 2018

DOI:https://doi.org/10.1103/PhysRevD.97.104062

© 2018 American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & Astrophysics

Authors & Affiliations

Volker Perlick1,*, Oleg Yu. Tsupko2,†, and Gennady S. Bisnovatyi-Kogan2,3,‡

  • 1ZARM, University of Bremen, 28359 Bremen, Germany
  • 2Space Research Institute of Russian Academy of Sciences, Profsoyuznaya 84/32, Moscow 117997, Russia
  • 3National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoe Shosse 31, Moscow 115409, Russia

  • *perlick@zarm.uni-bremen.de
  • tsupko@iki.rssi.ru
  • gkogan@iki.rssi.ru

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Issue

Vol. 97, Iss. 10 — 15 May 2018

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