scholarly journals Strong gravitational lensing for the photons coupled to a Weyl tensor in a Kerr black hole spacetime

2017 ◽  
Vol 95 (10) ◽  
Author(s):  
Songbai Chen ◽  
Shangyun Wang ◽  
Yang Huang ◽  
Jiliang Jing ◽  
Shiliang Wang
Author(s):  
Niyaz Uddin Molla ◽  
Ujjal Debnath

We investigate the strong gravitational lensing on equatorial plane as well as quasi-equatorial plane by the Kerr–Newman-Nut-Quintessence (KNNQ) black hole (BH) with the equation of state (EoS) parameter of the quintessence [Formula: see text] and the quintessence density [Formula: see text]. Our results show that the strong gravitational lensing in the KNNQ black hole space–time has some distinct behaviors from those in the backgrounds of the four dimension Kerr black hole. Also, we investigate the strong gravitational lensing on equatorial plane as well as quasi-equatorial plane by the KNNQ BH with the effects of Nut charge, spin parameter and quintessence parameter. First, we calculate the null geodesic equations using the Hamilton–Jacobi separation method. Then we investigate the equatorial lensing by KNNQ black hole. We obtain the deflection angle and deflection coefficients in the equatorial plane, which is affected by EoS parameter of the quintessence [Formula: see text], quintessence density [Formula: see text], Nut parameter [Formula: see text], spin parameter [Formula: see text] and quintessence parameter [Formula: see text] [Formula: see text]. Next, we discuss the lens equation and the observables in the equatorial plane. Finally, we investigate gravitational lensing by the KNNQ black hole in the quasi-equatorial plane. In this work, the quintessence density [Formula: see text], the EoS parameter of the quintessence [Formula: see text], Nut parameter [Formula: see text], spin parameter [Formula: see text] and quintessence parameter [Formula: see text] [Formula: see text] have significant effects on the strong gravitational lensing both in equatorial plane as well as quasi-equatorial plane.


2011 ◽  
Vol 83 (8) ◽  
Author(s):  
Chikun Ding ◽  
Shuai Kang ◽  
Chang-Yong Chen ◽  
Songbai Chen ◽  
Jiliang Jing

2013 ◽  
Vol 88 (10) ◽  
Author(s):  
Chikun Ding ◽  
Changqing Liu ◽  
Yuanyuan Xiao ◽  
Liqun Jiang ◽  
Rong-Gen Cai

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