弦云中巴丁黑洞的强引力透镜效应

IF 3 3区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Annals of Physics Pub Date : 2025-02-12 DOI:10.1016/j.aop.2025.169957

Bijendra Kumar Vishvakarma , Shubham Kala , Sanjay Siwach

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引用次数: 0

摘要

研究了强场极限下弦云中巴丁黑洞的引力透镜效应。通过与Bardeen黑洞透镜的比较，概述了CoS参数b的影响。对于不同的CoS参数值，根据冲击参数确定了强挠度极限系数。通过使用两个天体物理黑洞透镜SgrA∗和M87∗的参数，我们获得了相对论性图像的放大并确定了相对论性爱因斯坦环。利用EHT观测结果对巴丁黑洞的CoS参数进行了约束。

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Strong gravitational lensing by Bardeen black hole in cloud of strings

We investigate the gravitational lensing by Bardeen black hole in cloud of strings (CoS) in strong field limit. The effect of CoS parameter

b

has been outlined in comparison with Bardeen black hole lens. The strong deflection limit coefficients are determined in terms of impact parameter for various values of CoS parameter. We obtain magnification of relativistic images and determine relativistic Einstein rings by using the parameters of two astrophysical black hole lenses

S g r A^{*}

and

M 8 7^{*}

. We constrain CoS parameter of Bardeen black hole using EHT observations for these black holes.

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来源期刊

Annals of Physics 物理-物理：综合

CiteScore

5.30

自引率

3.30%

发文量

211

审稿时长

47 days

期刊介绍： Annals of Physics presents original work in all areas of basic theoretic physics research. Ideas are developed and fully explored, and thorough treatment is given to first principles and ultimate applications. Annals of Physics emphasizes clarity and intelligibility in the articles it publishes, thus making them as accessible as possible. Readers familiar with recent developments in the field are provided with sufficient detail and background to follow the arguments and understand their significance. The Editors of the journal cover all fields of theoretical physics. Articles published in the journal are typically longer than 20 pages.