scholarly journals Gravitational lensing of a star by a rotating black hole

JETP Letters ◽  
2017 ◽  
Vol 106 (10) ◽  
pp. 637-642 ◽  
Author(s):  
V. I. Dokuchaev ◽  
N. O. Nazarova
Keyword(s):  
Black Hole ◽  
Gravitational Lensing ◽  
Rotating Black Hole

scholarly journals Dynamics of the nonrotating and rotating black hole scalarization

2021 ◽  
Vol 103 (6) ◽  
Author(s):  
Daniela D. Doneva ◽  
Stoytcho S. Yazadjiev
Keyword(s):  
Black Hole ◽  
Rotating Black Hole

scholarly journals Null Geodesics and Strong Field Gravitational Lensing in a String Cloud Background

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
M. Sharif ◽  
Sehrish Iftikhar
Keyword(s):  
Black Hole ◽  
Gravitational Lensing ◽  
Galactic Center ◽  
Deflection Angle ◽  
Orbital Motion ◽  
Strong Field ◽  
Schwarzschild Black Hole ◽  
Field Limit ◽  
Null Geodesics ◽  
Supermassive Black Hole

This paper is devoted to studying two interesting issues of a black hole with string cloud background. Firstly, we investigate null geodesics and find unstable orbital motion of particles. Secondly, we calculate deflection angle in strong field limit. We then find positions, magnifications, and observables of relativistic images for supermassive black hole at the galactic center. We conclude that string parameter highly affects the lensing process and results turn out to be quite different from the Schwarzschild black hole.

scholarly journals Gravitational Lensing in Presence of Plasma: Strong Lens Systems, Black Hole Lensing and Shadow

Universe ◽  
2017 ◽  
Vol 3 (3) ◽  
pp. 57 ◽  
Author(s):  
Gennady Bisnovatyi-Kogan ◽  
Oleg Tsupko
Keyword(s):  
Black Hole ◽  
Gravitational Lensing
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