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arXiv 1902.04411gr-qc
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利用Gauss-Bonnet定理研究宇宙弦对规则黑洞的弱引力透镜

Weak gravitational lensing of regular black holes with cosmic strings using the Gauss-Bonnet theorem

A. Övgün

摘要:

本文研究了弱场极限下含宇宙弦的规则黑洞时空中的光弯曲。为此,我们将Gauss-Bonnet定理应用于黑洞的光学几何,并利用Gibbons-Werner方法,得到了弱场极限下光的偏转角,这表明光的弯曲是一种全局的拓扑效应.然后,我们证明了等离子体介质对RBCS对光偏转的影响。我们讨论了宇宙弦参数$μ$和质量$M_0$的增大会使弯曲角增大。

英文摘要:

In this paper, we investigate light bending in the spacetime of regular black holes with cosmic strings in weak field limits. To do so, we apply the Gauss-Bonnet theorem to the optical geometry of the black hole; and, using the Gibbons-Werner method, we obtain the deflection angle of light in the weak field limits which shows that the bending of light is a global and topological effect. Afterwards, we demonstrate the effect of a plasma medium on the deflection of light by RBCS. We discuss that increasing cosmic string parameter $μ$ and mass $M_0$ will increase the bending angle.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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