Gravitational wave memory in conformally flat spacetimes

Niko Jokela; Keijo Kajantie; Miika Sarkkinen

doi:10.1007/JHEP05(2023)055

Gravitational wave memory in conformally flat spacetimes

Research output: Contribution to journal › Article › Scientific › peer-review

Abstract

We study the gravitational wave memory effect in spacetimes related to flat space by a conformal transformation. The discussion is general but the gravitational wave length scale is assumed to be small compared with the background curvature radius. The general formulas are applied to Friedmann-Robertson-Walker metrics of all spatial curvatures. The effect of new terms stemming from spatial curvature is potentially detectable in future gravitational wave measurements.

Original language	English
Article number	55
Journal	Journal of High Energy Physics
Volume	2023
Issue number	5
Number of pages	29
ISSN	1029-8479
DOIs	https://doi.org/10.1007/JHEP05(2023)055
Publication status	Published - 8 May 2023
MoE publication type	A1 Journal article-refereed

Fields of Science

114 Physical sciences
115 Astronomy, Space science

Access to Document

10.1007/JHEP05(2023)055Licence: CC BY

JHEP05(2023)055Final published version, 493 KBLicence: CC BY

Cite this

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abstract = "We study the gravitational wave memory effect in spacetimes related to flat space by a conformal transformation. The discussion is general but the gravitational wave length scale is assumed to be small compared with the background curvature radius. The general formulas are applied to Friedmann-Robertson-Walker metrics of all spatial curvatures. The effect of new terms stemming from spatial curvature is potentially detectable in future gravitational wave measurements.",

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AU - Sarkkinen, Miika

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AB - We study the gravitational wave memory effect in spacetimes related to flat space by a conformal transformation. The discussion is general but the gravitational wave length scale is assumed to be small compared with the background curvature radius. The general formulas are applied to Friedmann-Robertson-Walker metrics of all spatial curvatures. The effect of new terms stemming from spatial curvature is potentially detectable in future gravitational wave measurements.

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KW - 115 Astronomy, Space science

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