scholarly journals Weak gravitational lensing of quantum perturbed lukewarm black holes and cosmological constant effect

2017 ◽  
Vol 17 (6) ◽  
pp. 052 ◽  
Author(s):  
Hossein Ghaffarnejad ◽  
Mojtaba Amir Mojahedi
Keyword(s):  
Black Holes ◽  
Cosmological Constant ◽  
Gravitational Lensing ◽  
Weak Gravitational Lensing

scholarly journals Image formation in weak gravitational lensing by tidal charged black holes

2010 ◽  
Vol 27 (23) ◽  
pp. 235006 ◽  
Author(s):  
Zsolt Horváth ◽  
László Árpád Gergely ◽  
David Hobill
Keyword(s):  
Black Holes ◽  
Gravitational Lensing ◽  
Image Formation ◽  
Weak Gravitational Lensing ◽  
Charged Black Holes

scholarly journals Weak gravitational lensing by stringy black holes

2020 ◽  
Vol 135 (3) ◽  
Author(s):  
Wajiha Javed ◽  
Muhammad Bilal Khadim ◽  
Jameela Abbas ◽  
Ali Övgün
Keyword(s):  
Black Holes ◽  
Gravitational Lensing ◽  
Weak Gravitational Lensing

scholarly journals Effect of the Hair on Deflection Angle by Asymptotically Flat Black Holes in Einstein-Maxwell-Dilaton Theory

2019 ◽  
Author(s):  
Wajiha Javed ◽  
Jameela Abbas ◽  
Ali Övgün
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Gravitational Lensing ◽  
Deflection Angle ◽  
Maxwell Theory ◽  
Weak Gravitational Lensing ◽  
Asymptotically Flat ◽  
The Deflection Angle ◽  
The Impact ◽  
Hairy Black Hole

In this paper, we are interested in a model of exact asymptotically flat charged hairy black holes in the background of dilaton potential. We study the weak gravitational lensing in the spacetime of hairy black hole in Einstein-Maxwell theory with a non-minimally coupled dilaton and its non-trivial potential. In doing so, we use the optical geometry of the flat charged hairy black hole for some range of parameter $\gamma$. For this purpose, by using Gauss-Bonnet theorem, we obtain the deflection angle of photon in a spherically symmetric and asymptotically flat spacetime. Moreover, we also investigate the impact of plasma medium on weak gravitational lensing by asymptotically flat charged hairy black hole with a  dilaton potential. Our analytically analyses show the effect of the hair on the deflection angle in weak field limits.

scholarly journals Weak Gravitational Lensing by Bocharova-Bronnikove-Melnikov-Bekenstein Black Holes Using Gauss-Bonnet Theorem

2020 ◽  
Author(s):  
Wajiha Javed ◽  
Muhammad Bilal Khadim ◽  
Ali Övgün
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Gravitational Lensing ◽  
Deflection Angle ◽  
Spherically Symmetric ◽  
Plasma Medium ◽  
Weak Gravitational Lensing ◽  
The Deflection Angle ◽  
Bonnet Theorem ◽  
Symmetric Spacetime

In this article, we demonstrate the weak gravitational lensing in the context of Bocharova-Bronnikove-Melnikov-Bekenstein (BBMB) black hole. To this desire, we derive the deflection angle of light in a plasma medium by BBMB black hole using the Gibbons and Werner method. First, we obtain the Gaussian optical curvature and implement the Gauss-Bonnet theorem to investigate the deflection angle for spherically symmetric spacetime of BBMB black hole. Moreover, we also analyze the graphical behavior of deflection angle by BBMB black hole in the presence of plasma medium.

scholarly journals Weak Gravitational Lensing by Stringy Black Holes

2019 ◽  
Author(s):  
Wajiha Javed ◽  
Muhammad Bilal Khadim ◽  
Jameela Abbas ◽  
Ali Övgün
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Gravitational Lensing ◽  
Deflection Angle ◽  
Plasma Medium ◽  
Coupling Constant ◽  
Weak Gravitational Lensing ◽  
Hole Charge ◽  
The Deflection Angle ◽  
Bonnet Theorem

In this paper, we discuss the weak gravitational lensing in the context of stringy black holes. Initially, we examine the deflection angle of photon by charged stringy black hole. For this desire, we compute the Gaussian optical curvature and implement the Gauss-Bonnet theorem to investigate the deflection angle for spherically balanced spacetime of stringy black hole. We also analyze the influence of plasma medium in the weak gravitational lensing for stringy black hole. Moreover, the graphical impact of coupling constant $\alpha$, impact parameter $b$ , black hole charge $Q$ on deflection angle by charged stringy black hole has been studied in plasma as well as non-plasma medium.

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