Gravitational lensing by a black-bounce-Reissner–Nordström spacetime
Jing ZhangSchool of Astronomy and Space Science, Nanjing University, Nanjing 210023, ChinaYi XiePurple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, China
2022en
ABI
Abstract
Abstract We investigate the weak and strong deflection gravitational lensing by a black-bounce-Reissner–Nordström spacetime and obtain their lensing observables. Assuming the supermassive black holes in the Galactic Center and at the center of M87, Sgr A* and M87* respectively, as the lenses, we evaluate these observables and assess their detectability. We also intensively compare these lensing signatures with those of various tidal or charged spacetimes. We find that it might be possible to distinguish these spacetimes by measuring the fluxes difference of the lensed images by Sgr A* in its quiet stage.
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Cited by 60 references