Gauge Independence of Induced Gravitational Waves
General Relativity and Quantum Cosmology
2020-01-29 v3 Cosmology and Nongalactic Astrophysics
High Energy Physics - Phenomenology
Abstract
We study gauge (in)dependence of the gravitational waves (GWs) induced from curvature perturbations. For the GWs produced in a radiation-dominated era, we find that the observable (late-time) GWs in the TT gauge and in the Newtonian gauge are the same in contrast to a claim in the literature. We also mention the interpretation of the gauge dependence of the tensor perturbations which appears in the context of the induced GWs.
Keywords
Cite
@article{arxiv.1912.00785,
title = {Gauge Independence of Induced Gravitational Waves},
author = {Keisuke Inomata and Takahiro Terada},
journal= {arXiv preprint arXiv:1912.00785},
year = {2020}
}
Comments
16 pages, 1 figure; published version (minor revision)