Rotation of galaxies as a signature of cosmic strings in weak lensing surveys

Abstract

Vector perturbations sourced by topological defects can generate rotations in the lensing of background galaxies. This is a potential smoking gun for the existence of defects since rotation generates a curl-like component in the weak lensing signal which is not generated by standard density perturbations at linear order. This rotation signal is calculated as generated by cosmic strings. Future large scale weak lensing surveys should be able to detect this signal even for string tensions an order of magnitude lower than current constraints.

References in corpus (5)

• CMB power spectrum contribution from cosmic strings using field-evolution simulations of the Abelian Higgs model
• Fitting CMB data with cosmic strings and inflation
• Constraints on Supersymmetric Models of Hybrid Inflation
• Cosmic Shear from Scalar-Induced Gravitational Waves
• The Nonlinear Evolution of Galaxy Intrinsic Alignments

Cited by in corpus (6)

• Dynamical behavior of the $C$-metric: charged scalar fields, quasinormal modes and superradiance
• Cosmic stringlike objects in hybrid metric-Palatini gravity
• Cosmic strings in generalized hybrid metric-Palatini gravity
• Ringdown Spectroscopy of Rotating Black Holes Pierced by Cosmic Strings
• Mapping weak lensing distortions in the Kerr metric
• On the Quantization of Burgers Vector and Gravitational Energy in the Space-Time of a Conical Defect