This article is cited in 21 papers

ASTROPHYSICS AND COSMOLOGY

Gravitational lensing of a star by a rotating black hole

V. I. Dokuchaev^ab, N. O. Nazarova<sup>a

a</sup> Institute for Nuclear Research, Russian Academy of Sciences, Moscow, Russia
^b National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow, Russia

Abstract: The gravitational lensing of a finite star moving around a rotating Kerr black hole has been numerically simulated. Calculations for the direct image of the star and for the first and second light echoes have been performed for the star moving with an orbital period of 3.22 h around the supermassive black hole SgrA* at the center of the Galaxy. The time dependences for the observed position of the star on the celestial sphere, radiation flux from the star, frequency of detected radiation, and major and minor semiaxes of the lensed image of the star have been calculated and plotted. The detailed observation of such lensing requires a space interferometer such as the Russian Millimetron project.

Received: 09.10.2017
Revised: 23.10.2017

DOI: 10.7868/S0370274X17220039

 English version: Journal of Experimental and Theoretical Physics Letters, 2017, 106:10, 637–642

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