Light from Reissner–Nordstrom–de Sitter black holes
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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. Cotăescu, Eur. Phys. J. C 81, 32 (2021)], 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.
2021 ◽
Vol 81
(1)
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2011 ◽
Vol 26
(39)
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pp. 2923-2950
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The Free Energy for Rotating and Charged Black Holes and Banados, Teitelboim and Zanelli Black Holes
2018 ◽
Vol 73
(11)
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pp. 1061-1073
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2004 ◽
Vol 13
(07)
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pp. 1375-1379
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2011 ◽
Vol 26
(14)
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pp. 999-1007
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2016 ◽
Vol 94
(12)
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pp. 1369-1371
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