Anisotropies of gravitational wave backgrounds: a line of sight approach

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Title: Anisotropies of gravitational wave backgrounds: a line of sight approach
Author(s): Contaldi, CR
Item Type: Journal Article
Abstract: In the weak field regime, gravitational waves can be considered as being made up of collisionless, relativistic tensor modes that travel along null geodesics of the perturbed background metric. We work in this geometric optics picture to calculate the anisotropies in gravitational wave backgrounds resulting from astrophysical and cosmological sources. Our formalism yields expressions for the angular power spectrum of the anisotropies. We show how the anisotropies are sourced by intrinsic, Doppler, Sachs–Wolfe, and Integrated Sachs–Wolfe terms in analogy with Cosmic Microwave Background photons.
Publication Date: 10-May-2017
Date of Acceptance: 8-May-2017
URI: http://hdl.handle.net/10044/1/51369
DOI: https://dx.doi.org/10.1016/j.physletb.2017.05.020
ISSN: 0370-2693
Publisher: Elsevier
Start Page: 9
End Page: 12
Journal / Book Title: Physics Letters B
Volume: 771
Copyright Statement: © 2017 The Author(s ). Published by Elsevier B.V. This is an open access article under the CC-BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.
Sponsor/Funder: Science and Technology Facilities Council (STFC)
Funder's Grant Number: ST/L00044X/1
Keywords: Science & Technology
Physical Sciences
Astronomy & Astrophysics
Physics, Nuclear
Physics, Particles & Fields
Physics
astro-ph.CO
astro-ph.CO
gr-qc
Science & Technology
Physical Sciences
Astronomy & Astrophysics
Physics, Nuclear
Physics, Particles & Fields
Physics
0202 Atomic, Molecular, Nuclear, Particle And Plasma Physics
Nuclear & Particles Physics
Publication Status: Published
Open Access location: http://www.sciencedirect.com/science/article/pii/S0370269317303817
Appears in Collections:Physics
Theoretical Physics
Faculty of Natural Sciences



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