Black hole shadow in an expanding universe with a cosmological constant

By V. Perlick, O. Tsupko, G. Bisnovatyi-Kogan. Physical Review D, 2018

148 citations recorded by the source corpus.

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.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/207056c24d840304bdaf81d064a805141b6fbace

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. O. Tsupko
2. Rahul Kumar
3. Sushant G. Ghosh
4. V. Perlick
5. G. Bisnovatyi-Kogan
6. M. Werner
7. A. Rogers

In Nuclear and High Energy Physics

1. Rahul Kumar
2. O. Tsupko
3. Sushant G. Ghosh
4. V. Perlick
5. G. Bisnovatyi-Kogan

Citations in the corpus

• Calculating black hole shadows: Review of analytical studies (2021, methodology): “The influence of the plasma on the shadow was analytically determined, for the case that both the space-time and the plasma are spherically symmetric and static, by Perlick, Tsupko and Bisnovatyi-Kogan [56].”
• Black Hole Parameter Estimation from Its Shadow (2018, methodology): “The black hole shadow in asymptotically de-Sitter spacetime has also been analyzed (Grenzebach et al. 2014; Eiroa & Sendra 2018; Perlick et al. 2018).”