Effect of the cosmological constant on the deflection angle by a rotating cosmic string

Kimet Jusufi, ALI OVGUN

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

We report the effect of the cosmological constant and the internal energy density of a cosmic string on the deflection angle of light in the spacetime of a rotating cosmic string with internal structure. We first revisit the deflection angle by a rotating cosmic string and then provide a generalization using the geodesic equations and the Gauss-Bonnet theorem. We show there is an agreement between the two methods when employing higher-order terms of the linear mass density of the cosmic string. By modifying the integration domain for the global conical topology, we resolve the inconsistency between these two methods previously reported in the literature. We show that the deflection angle is not affected by the rotation of the cosmic string; however, the cosmological constant Λ strongly affects the deflection angle, which generalizes the well-known result.

Original languageEnglish
Article number064030
JournalPhysical Review D
Volume97
Issue number6
DOIs
StatePublished - 15 Mar 2018

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