Motion of particles and gravitational lensing around the (2+1)-dimensional BTZ black hole in Gauss-Bonnet gravity

被引：24

作者：

Narzilloev, Bakhtiyor ^{[1
,2
,3
,5
]}

Shaymatov, Sanjar ^{[2
,3
,4
,5
,6
,10
]}

Hussain, Ibrar ^{[7
]}

Abdujabbarov, Ahmadjon ^{[3
,5
,6
,8
,9
]}

Ahmedov, Bobomurat ^{[3
,5
,6
]}

Bambi, Cosimo ^{[1
]}

机构：

[1] Fudan Univ, Ctr Field Theory & Particle Phys, Dept Phys, Shanghai 200438, Peoples R China

[2] Akfa Univ, Kichik Halqa Yuli St 17, Tashkent 100095, Uzbekistan

[3] Ulugh Beg Astron Inst, Astron St 33, Tashkent 100052, Uzbekistan

[4] Zheijiang Univ Technol, Inst Theoret Phys & Cosmol, Hangzhou 310023, Peoples R China

[5] Natl Univ Uzbekistan, Tashkent 100174, Uzbekistan

[6] Tashkent Inst Irrigat & Agr Mechanizat Engineers, Kori Niyoziy 39, Tashkent 100000, Uzbekistan

[7] Natl Univ Sci & Technol, Sch Elect Engn & Comp Sci, H-12, Islamabad, Pakistan

[8] Inst Nucl Phys, Ulugbek 1, Tashkent 100214, Uzbekistan

[9] Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China

[10] Tashkent State Tech Univ, Power Engn Fac, Tashkent 100095, Uzbekistan

来源：

EUROPEAN PHYSICAL JOURNAL C | 2021年 / 81卷 / 09期

关键词：

MAGNETIZED ORBITS; CHARGED-PARTICLES; SHADOW; FIELD;

D O I：

10.1140/epjc/s10052-021-09617-4

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We study the motion of test particles and photons in the vicinity of the (2+1)-dimensional Gauss-Bonnet (GB) BTZ black hole. We find that the presence of the coupling constant serves as an attractive gravitational charge, shifting the innermost stable circular orbits outward with respect to the one for this theory in four dimensions. Further, we consider the gravitational lensing, to test the GB gravity in (2+1) dimensions and show that the presence of the GB parameter causes the bending angle to first increase with the increase in the inverse of the closest approach distance, u(0), reaching a peak value for a specific u(0)*, and then decreasing to zero. We also show that the increase in the value of the GB parameter decreases the bending angle, and the increase in the absolute value of the negative cosmological constant produces an opposite effect on this angle.

引用

页数：10

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