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Rotating regular black holes in AdS spacetime and its shadow | | Balendra Pratap Singh
; Md Sabir Ali
; Sushant~G.~Ghosh
; | | Date: |
25 Jul 2022 | | Abstract: | The presence of a photon region around the black hole is an essential feature
in receiving the emitted spectrum from the vicinity of the black hole by the
distant observer. In this paper, we investigate the optical properties of
rotating regular anti-de Sitter (AdS) black holes, which characterized by its
mass $(M)$, spin parameter $(a)$, deviation parameter $(k)$ and the
cosmological constant $(Lambda)$ related to the curvature radius via
$(Lambda=-3/l^2)$. We derive the complete null geodesic equations of motion
and study the unstable circular orbits for an observer at given Boyer-Lindquist
coordinates ($r_O,;vartheta_O$) in the domain of outer communication and
trace the photon rings. For the analytical part of our study, we investigate
the observables, namely, shadow radius $(R_s)$ and distortion parameter
$(delta_s)$. These rotating regular AdS black holes have smaller shadows when
compare to the Kerr and regular spacetimes. We also estimate the energy
emission rate of the black hole. | | Source: | arXiv, 2207.11907 | | Services: | Forum | Review | PDF | Favorites | |
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