Gravitational lensing of a star by a rotating black hole


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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.

作者简介

V. Dokuchaev

Institute for Nuclear Research; National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)

编辑信件的主要联系方式.
Email: dokuchaev@inr.ac.ru
俄罗斯联邦, Moscow, 117312; Moscow, 115409

N. Nazarova

National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)

Email: dokuchaev@inr.ac.ru
俄罗斯联邦, Moscow, 115409

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