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

2017/12/31 by Kimet Jusufi, Ali Övgün · 5 citations
Physics and Astronomy · #Astrophysics #COSMIC cancer database #Classical mechanics #Cosmic string #Cosmological constant #Cosmology and Gravitation Theories #Deflection (physics) #Galaxies: Formation, Evolution, Phenomena #Mathematical physics #Physics #Pulsars and Gravitational Waves Research #String (physics) #Theoretical physics #gr-qc

paper · pdf · doi:10.1103/physrevd.97.064030

published as Phys. Rev. D 97, 064030 (2018) · 5 pages, Accepted for publication in Physical Review D

arxiv created 2018/03/08 · openalex publication_date 2018/03/26 · arxiv updated 2018/04/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

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 \mathrm\ensuremathΛ strongly affects the deflection angle, which generalizes the well-known result.

Citations

• Scaling of cosmic string loops
• Gravitational lensing in the Kerr-Randers optical geometry
• Cosmic strings in a space–time with positive cosmological constant
• On an Asymmetrical Metric in the Four-Space of General Relativity
• Bending of light and the cosmological constant
• Correlation of CMB with large-scale structure. II. Weak lensing
• Observation of Gravitational Waves from a Binary Black Hole Merger
• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral

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