Journal
PHYSICAL REVIEW D
Volume 101, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.101.023523
Keywords
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Funding
- World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan
- JSPS Research Fellowship for Young Scientists
- JSPS KAKENHI [JP18J12728]
- Advanced Leading Graduate Course for Photon Science
- IBS [IBS-R018-D1]
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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 transverse-traceless (synchronous) gauge and in the Newtonian gauge arc 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.
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