English

Black hole shadows in fourth-order conformal Weyl gravity

General Relativity and Quantum Cosmology 2018-04-13 v2

Abstract

We calculate the characteristics of the "black hole shadow" for a rotating, neutral black hole in fourth-order conformal Weyl gravity. It is shown that the morphology is not significantly affected by the underlying framework, except for very large masses. Conformal gravity black hole shadows would also significantly differ from their general relativistic counterparts if the values of the main conformal gravity parameters, γ\gamma and κ\kappa, were increased by several orders of magnitude. Such increased values for γ\gamma and κ\kappa are currently ruled out by gravitational phenomenology. Therefore, it is unlikely that these differences in black hole shadows will be detected in future observations, carried out by the Event Horizon Telescope or other such experiments.

Keywords

Cite

@article{arxiv.1611.00399,
  title  = {Black hole shadows in fourth-order conformal Weyl gravity},
  author = {Jonas R. Mureika and Gabriele U. Varieschi},
  journal= {arXiv preprint arXiv:1611.00399},
  year   = {2018}
}

Comments

21 pages, including 2 figures. Minor corrections and references added. Final version to appear in the Canadian Journal of Physics

R2 v1 2026-06-22T16:39:10.496Z