Light from Reissner-Nordstrom-de Sitter black holes

Abstract

We derive for the first time the form of the spiral null geodesics around the photon sphere of the Reissner-Nordstrom black hole in the de Sitter expanding universe. Moreover, we obtain the principal parameter we need for deriving, according to our method [I. I. Cot\u aescu. {Eur. Phys. J. C.} (2021) 81:32], the black hole shadow and the related redshift as measured by a remote observer situated in the asymptotic zone. We obtain thus a criterion of detecting charged black holes without peculiar velocities when one knows the mass, redshift and the black hole shadow.

14 pages, 3 figures. arXiv admin note: text overlap with arXiv:2011.02434

References in corpus (7)

• Light-bending in Schwarzschild-de-Sitter: projective geometry of the optical metric
• High gas fraction in a CO-selected main-sequence galaxy at $z>3$
• The physical meaning of the de Sitter invariants
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Cited by in corpus (3)

• Shadow and weak deflection angle of extended uncertainty principle black hole surrounded with dark matter
• Kinematics in spatially flat FLRW space-time
• Quantum theory of redshift in de Sitter expanding universe