Multi-level images around Kerr-Newman black holes

Autor:	Hou, Yehui, Liu, Peng, Guo, Minyong, Yan, Haopeng, Chen, Bin
Rok vydání:	2022
Předmět:	General Relativity and Quantum Cosmology
Druh dokumentu:	Working Paper
DOI:	10.1088/1361-6382/ac8860
Popis:	We study the lensing effects of Kerr-Newman (KN) black holes and the multi-level images of luminous sources around the black holes. We obtain the analytic forms of the lens equations in KN spacetime and derive approximately their limiting forms for photon emissions near the bounded photon orbits. After deriving the expressions of three key parameters $\gamma$, $\delta$ and $\tau$, we investigate the primary, the secondary and the higher-order images of spherical sources and equatorial disk-like sources. In particular, we find that the charge of KN black hole has a significant effect on the higher-order images. Comment: Minor revisions. Version accepted for publication on CQG as a Special Issue Article on the impact of EHT observations
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2203.02755 Zobrazit plný text záznamu View this record from Arxiv