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  Astrometric Effects of Gravitational Wave Backgrounds with non-Luminal Propagation Speeds

Mihaylov, D. P., Moore, C. J., Gair, J., Lasenby, A., & Gilmore, G. (2020). Astrometric Effects of Gravitational Wave Backgrounds with non-Luminal Propagation Speeds. Physical Review D, 101 (2): 024038. doi:10.1103/PhysRevD.101.024038.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-A5E8-B Version Permalink: http://hdl.handle.net/21.11116/0000-0005-A5E9-A
Genre: Journal Article

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 Creators:
Mihaylov , Deyan P.1, Author
Moore, Christopher J., Author
Gair, Jonathan1, Author              
Lasenby, Anthony, Author
Gilmore, Gerard, Author
Affiliations:
1Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1933290              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc,Astrophysics, Cosmology and Extragalactic Astrophysics, astro-ph.CO, Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE
 Abstract: A passing gravitational wave causes a deflection in the apparent astrometric positions of distant stars. The effect of the speed of the gravitational wave on this astrometric shift is discussed. A stochastic background of gravitational waves would result in a pattern of astrometric deflections which are correlated on large angular scales. These correlations are quantified and investigated for backgrounds of gravitational waves with sub- and super-luminal group velocities. The statistical properties of the correlations are depicted in two equivalent and related ways: as correlation curves and as angular power spectra. Sub-(super-)luminal gravitational wave backgrounds have the effect of enhancing (suppressing) the power in low-order angular modes. Analytical representations of the redshift-redshift and redshift-astrometry correlations are also derived. The potential for using this effect for constraining the speed of gravity is discussed.

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 Dates: 2019-11-232020
 Publication Status: Published in print
 Pages: 14 pages, 16 figures, accepted for publication in Physical Review D
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 Identifiers: arXiv: 1911.10356
DOI: 10.1103/PhysRevD.101.024038
URI: http://arxiv.org/abs/1911.10356
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Title: Physical Review D
Source Genre: Journal
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Pages: - Volume / Issue: 101 (2) Sequence Number: 024038 Start / End Page: - Identifier: -