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Light from Reissner–Nordstrom–de Sitter black holes
Modern Physics Letters A ( IF 1.4 ) Pub Date : 2021-07-23 , DOI: 10.1142/s0217732321501625
Ion I. Cotăescu 1
Affiliation  

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.

中文翻译:

来自 Reissner–Nordstrom–de Sitter 黑洞的光

我们首次推导出德西特膨胀宇宙中 Reissner-Nordstrom 黑洞光子球周围的螺旋零测地线的形式。此外,根据我们的方法 [II Cotăescu,欧元。物理。J.C 81, 32 (2021)],黑洞阴影和相关的红移,由位于渐近区的远程观测者测量。因此,当我们知道质量、红移和黑洞阴影时,我们获得了一个检测带电黑洞而没有特殊速度的标准。
更新日期:2021-07-23
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