Astrometric Effects of Gravitational Wave Backgrounds with non-Luminal Propagation Speeds
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Publication Date
2020-01-21Journal Title
Physical Review D: Particles, Fields, Gravitation and Cosmology
ISSN
1550-2368
Publisher
American Physical Society
Type
Article
This Version
AM
Metadata
Show full item recordCitation
Mihaylov, D., Moore, C. J., Gair, J., Lasenby, A., & Gilmore, G. (2020). Astrometric Effects of Gravitational Wave Backgrounds with non-Luminal Propagation Speeds. Physical Review D: Particles, Fields, Gravitation and Cosmology https://doi.org/10.17863/CAM.46791
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.
Sponsorship
ERC
Funder references
Leverhulme Trust (RPG-2012-541)
European Research Council (320360)
Identifiers
This record's DOI: https://doi.org/10.17863/CAM.46791
This record's URL: https://www.repository.cam.ac.uk/handle/1810/299721
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All rights reserved