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Kinematic anisotropies and pulsar timing arrays

Gianmassimo Tasinato Orcid Logo

Physical Review D, Volume: 108, Issue: 10

Swansea University Author: Gianmassimo Tasinato Orcid Logo

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DOI (Published version): 10.1103/physrevd.108.103521

Abstract

Doppler anisotropies, induced by our relative motion with respect to the source rest frame, are a guaranteed property of stochastic gravitational wave backgrounds of cosmological origin. If detected by future pulsar timing array measurements, they will provide interesting information on the physics...

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Published in: Physical Review D
ISSN: 2470-0010 2470-0029
Published: American Physical Society (APS) 2023
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URI: https://cronfa.swan.ac.uk/Record/cronfa65008
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spelling v2 65008 2023-11-17 Kinematic anisotropies and pulsar timing arrays cb754b073d1e4949c5e3db97744d3301 0000-0002-9835-4864 Gianmassimo Tasinato Gianmassimo Tasinato true false 2023-11-17 SPH Doppler anisotropies, induced by our relative motion with respect to the source rest frame, are a guaranteed property of stochastic gravitational wave backgrounds of cosmological origin. If detected by future pulsar timing array measurements, they will provide interesting information on the physics sourcing gravitational waves, which is hard or even impossible to extract from measurements of the isotropic part of the background only. We analytically determine the pulsar response function to kinematic anisotropies, including possible effects due to parity violation, to features in the frequency dependence of the isotropic part of the spectrum, as well as to the presence of extra scalar and vector polarizations. For the first time, we show how the sensitivity to different effects crucially depends on the pulsar configuration with respect to the relative motion among frames. Correspondingly, we propose examples of strategies of detection, each aimed at exploiting future measurements of kinematic anisotropies for characterizing distinct features of the cosmological gravitational wave background. Journal Article Physical Review D 108 10 American Physical Society (APS) 2470-0010 2470-0029 Cosmology, gravitational waves, kinematic anisotropies 16 11 2023 2023-11-16 10.1103/physrevd.108.103521 http://dx.doi.org/10.1103/physrevd.108.103521 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University G. T. is partially funded by the STFC (Grant No. ST/T000813/1). 2023-12-13T11:57:18.9144093 2023-11-17T16:29:06.4256354 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Gianmassimo Tasinato 0000-0002-9835-4864 1 65008__29255__d120e8cd8ef349f5a637defba34e4f9f.pdf 65008.VOR.pdf 2023-12-13T11:52:46.5506630 Output 736544 application/pdf Version of Record true Distributed under the terms of a Creative Commons Attribution 4.0 International License (CC BY 4.0). true eng https://creativecommons.org/licenses/by/4.0/
title Kinematic anisotropies and pulsar timing arrays
spellingShingle Kinematic anisotropies and pulsar timing arrays
Gianmassimo Tasinato
title_short Kinematic anisotropies and pulsar timing arrays
title_full Kinematic anisotropies and pulsar timing arrays
title_fullStr Kinematic anisotropies and pulsar timing arrays
title_full_unstemmed Kinematic anisotropies and pulsar timing arrays
title_sort Kinematic anisotropies and pulsar timing arrays
author_id_str_mv cb754b073d1e4949c5e3db97744d3301
author_id_fullname_str_mv cb754b073d1e4949c5e3db97744d3301_***_Gianmassimo Tasinato
author Gianmassimo Tasinato
author2 Gianmassimo Tasinato
format Journal article
container_title Physical Review D
container_volume 108
container_issue 10
publishDate 2023
institution Swansea University
issn 2470-0010
2470-0029
doi_str_mv 10.1103/physrevd.108.103521
publisher American Physical Society (APS)
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
url http://dx.doi.org/10.1103/physrevd.108.103521
document_store_str 1
active_str 0
description Doppler anisotropies, induced by our relative motion with respect to the source rest frame, are a guaranteed property of stochastic gravitational wave backgrounds of cosmological origin. If detected by future pulsar timing array measurements, they will provide interesting information on the physics sourcing gravitational waves, which is hard or even impossible to extract from measurements of the isotropic part of the background only. We analytically determine the pulsar response function to kinematic anisotropies, including possible effects due to parity violation, to features in the frequency dependence of the isotropic part of the spectrum, as well as to the presence of extra scalar and vector polarizations. For the first time, we show how the sensitivity to different effects crucially depends on the pulsar configuration with respect to the relative motion among frames. Correspondingly, we propose examples of strategies of detection, each aimed at exploiting future measurements of kinematic anisotropies for characterizing distinct features of the cosmological gravitational wave background.
published_date 2023-11-16T11:57:19Z
_version_ 1785167756397641728
score 11.035634

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