Null geodesics in a magnetically charged stringy black hole spacetime

被引：9
|
作者：
Kuniyal, Ravi Shankar [1 ]
Uniyal, Rashmi [1 ,2 ]
Nandan, Hemwati [1 ]
Purohit, K. D. [3 ]
机构：
[1] Gurukula Kangri Vishwavidyalaya, Dept Phys, Haridwar 249404, Uttarakhand, India
[2] Govt Degree Coll, Dept Phys, Garhwal 249175, Uttarakhand, India
[3] HNB Garhwal Univ, Dept Phys, Srinagar 246174, Garhwal, India
来源：
GENERAL RELATIVITY AND GRAVITATION | 2016年 / 48卷 / 04期
关键词：
Magnetic charged black hole; Electric charged black hole; Null geodesics; Photon orbits; Cone of avoidance; TEST PARTICLES; MOTION; KINEMATICS; FLOWS;
D O I：
10.1007/s10714-016-2041-6
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study the null geodesics of a four-dimensional magnetic charged black hole spacetime arising in string theory. The behaviour of effective potential in view of the different values of black hole parameters are analysed in the equatorial plane. The possible orbits for null geodesics are also discussed in view of the different values of the impact parameter. We have also calculated the frequency shift of photons in this spacetime. The results are compared to those obtained for the electrically charged stringy black hole spacetime and the Schwarzschild black hole spacetime in general relativity.
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页数：19
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