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Measuring the circular polarization of gravitational waves with pulsar timing arrays

NAYELI CRUZ, Ameek Malhotra Orcid Logo, Gianmassimo Tasinato Orcid Logo, Ivonne Zavala Carrasco Orcid Logo

Physical Review D, Volume: 110, Issue: 10

Swansea University Authors: NAYELI CRUZ, Ameek Malhotra Orcid Logo, Gianmassimo Tasinato Orcid Logo, Ivonne Zavala Carrasco Orcid Logo

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DOI (Published version): 10.1103/physrevd.110.103505

Abstract

The circular polarization of the stochastic gravitational wave background (SGWB) is a key observable for characterizing the origin of the signal detected by Pulsar Timing Array (PTA) collaborations. Both the astrophysical and the cosmological SGWB can have a sizeable amount of circular polarization,...

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Published in: Physical Review D
ISSN: 2470-0010 2470-0029
Published: American Physical Society (APS) 2024
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URI: https://cronfa.swan.ac.uk/Record/cronfa68001
first_indexed 2024-10-17T09:48:30Z
last_indexed 2024-12-06T19:46:10Z
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spelling 2024-12-06T12:37:45.6745383 v2 68001 2024-10-17 Measuring the circular polarization of gravitational waves with pulsar timing arrays cf519a22f0e3a3535b783a56c4ebcf20 NAYELI CRUZ NAYELI CRUZ true false dd6ebf069325cdbdbeb597fa64d48063 0000-0001-8346-9995 Ameek Malhotra Ameek Malhotra true false cb754b073d1e4949c5e3db97744d3301 0000-0002-9835-4864 Gianmassimo Tasinato Gianmassimo Tasinato true false 2fb8d4bb665e9a89d3b3478c17f646f8 0000-0002-5589-9928 Ivonne Zavala Carrasco Ivonne Zavala Carrasco true false 2024-10-17 The circular polarization of the stochastic gravitational wave background (SGWB) is a key observable for characterizing the origin of the signal detected by Pulsar Timing Array (PTA) collaborations. Both the astrophysical and the cosmological SGWB can have a sizeable amount of circular polarization, due to Poisson fluctuations in the source properties for the former, and to parity violating processes in the early universe for the latter. Its measurement is challenging since PTA are blind to the circular polarization monopole, forcing us to turn to anisotropies for detection. We study the sensitivity of current and future PTA datasets to circular polarization anisotropies, focusing on realistic modelling of intrinsic and kinematic anisotropies for astrophysical and cosmological scenarios respectively. Our results indicate that the expected level of circular polarization for the astrophysical SGWB should be within the reach of near future datasets, while for cosmological SGWB circular polarization is a viable target for more advanced SKA-type experiments. Journal Article Physical Review D 110 10 American Physical Society (APS) 2470-0010 2470-0029 7 11 2024 2024-11-07 10.1103/physrevd.110.103505 Swansea authors: Nayeli Marisol Jiménez Cruz, Ameek Malhotra, Gianmassimo Tasinato, Ivonne Zavala COLLEGE NANME COLLEGE CODE Swansea University SU Library paid the OA fee (TA Institutional Deal) We are partially funded by the STFC grants ST/T000813/1 and ST/X000648/1. We also acknowledge the support of the Supercomputing Wales project, which is part-funded by the European Regional Development Fund (ERDF) via Welsh Government. 2024-12-06T12:37:45.6745383 2024-10-17T10:31:11.8004550 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics NAYELI CRUZ 1 Ameek Malhotra 0000-0001-8346-9995 2 Gianmassimo Tasinato 0000-0002-9835-4864 3 Ivonne Zavala Carrasco 0000-0002-5589-9928 4
title Measuring the circular polarization of gravitational waves with pulsar timing arrays
spellingShingle Measuring the circular polarization of gravitational waves with pulsar timing arrays
NAYELI CRUZ
Ameek Malhotra
Gianmassimo Tasinato
Ivonne Zavala Carrasco
title_short Measuring the circular polarization of gravitational waves with pulsar timing arrays
title_full Measuring the circular polarization of gravitational waves with pulsar timing arrays
title_fullStr Measuring the circular polarization of gravitational waves with pulsar timing arrays
title_full_unstemmed Measuring the circular polarization of gravitational waves with pulsar timing arrays
title_sort Measuring the circular polarization of gravitational waves with pulsar timing arrays
author_id_str_mv cf519a22f0e3a3535b783a56c4ebcf20
dd6ebf069325cdbdbeb597fa64d48063
cb754b073d1e4949c5e3db97744d3301
2fb8d4bb665e9a89d3b3478c17f646f8
author_id_fullname_str_mv cf519a22f0e3a3535b783a56c4ebcf20_***_NAYELI CRUZ
dd6ebf069325cdbdbeb597fa64d48063_***_Ameek Malhotra
cb754b073d1e4949c5e3db97744d3301_***_Gianmassimo Tasinato
2fb8d4bb665e9a89d3b3478c17f646f8_***_Ivonne Zavala Carrasco
author NAYELI CRUZ
Ameek Malhotra
Gianmassimo Tasinato
Ivonne Zavala Carrasco
author2 NAYELI CRUZ
Ameek Malhotra
Gianmassimo Tasinato
Ivonne Zavala Carrasco
format Journal article
container_title Physical Review D
container_volume 110
container_issue 10
publishDate 2024
institution Swansea University
issn 2470-0010
2470-0029
doi_str_mv 10.1103/physrevd.110.103505
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
document_store_str 0
active_str 0
description The circular polarization of the stochastic gravitational wave background (SGWB) is a key observable for characterizing the origin of the signal detected by Pulsar Timing Array (PTA) collaborations. Both the astrophysical and the cosmological SGWB can have a sizeable amount of circular polarization, due to Poisson fluctuations in the source properties for the former, and to parity violating processes in the early universe for the latter. Its measurement is challenging since PTA are blind to the circular polarization monopole, forcing us to turn to anisotropies for detection. We study the sensitivity of current and future PTA datasets to circular polarization anisotropies, focusing on realistic modelling of intrinsic and kinematic anisotropies for astrophysical and cosmological scenarios respectively. Our results indicate that the expected level of circular polarization for the astrophysical SGWB should be within the reach of near future datasets, while for cosmological SGWB circular polarization is a viable target for more advanced SKA-type experiments.
published_date 2024-11-07T20:35:18Z
_version_ 1821348534347104256
score 11.04748

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