Weak field deflection angle by regular black holes with cosmic strings using the Gauss-Bonnet theorem

ALI OVGUN

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

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 a regular black hole with cosmic strings. We discuss that increasing cosmic string parameter μ and mass M0 will increase the bending angle.

Original languageEnglish
Article number104075
JournalPhysical Review D
Volume99
Issue number10
DOIs
StatePublished - 15 May 2019

Fingerprint

Dive into the research topics of 'Weak field deflection angle by regular black holes with cosmic strings using the Gauss-Bonnet theorem'. Together they form a unique fingerprint.

Cite this