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Enhancing gravitational wave anisotropies with peaked scalar sources
Journal of Cosmology and Astroparticle Physics, Volume: 2023, Issue: 01, Start page: 018
Swansea University Author:
Gianmassimo Tasinato
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DOI (Published version): 10.1088/1475-7516/2023/01/018
Abstract
Gravitational wave (GW) backgrounds of cosmological origin are expected to be nearly isotropic, with small anisotropies resembling those of the cosmic microwave background. We analyse the case of a scalar-induced GW background and clarify in the process the relation between two different approaches...
Published in: | Journal of Cosmology and Astroparticle Physics |
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ISSN: | 1475-7516 |
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IOP Publishing
2023
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URI: | https://cronfa.swan.ac.uk/Record/cronfa62473 |
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2023-02-09T11:29:07.5381669 v2 62473 2023-01-30 Enhancing gravitational wave anisotropies with peaked scalar sources cb754b073d1e4949c5e3db97744d3301 0000-0002-9835-4864 Gianmassimo Tasinato Gianmassimo Tasinato true false 2023-01-30 SPH Gravitational wave (GW) backgrounds of cosmological origin are expected to be nearly isotropic, with small anisotropies resembling those of the cosmic microwave background. We analyse the case of a scalar-induced GW background and clarify in the process the relation between two different approaches to calculating GW anisotropies. We focus on GW scenarios sourced by a significantly peaked scalar spectrum, which are frequently considered in the context of primordial black holes production. We show that the resulting GW anisotropies are characterised by a distinct frequency dependence. We explore the observational consequences concentrating on a GW background enhanced in the frequency band of space-based GW detectors. We study the detectability of the signal through both cross-correlations among different space-based GW detectors, and among GW and CMB experiments. Journal Article Journal of Cosmology and Astroparticle Physics 2023 01 018 IOP Publishing 1475-7516 13 1 2023 2023-01-13 10.1088/1475-7516/2023/01/018 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University M.F. would like to acknowledge support from the “Atracción de Talento” grant 2019- T1/TIC15784, his work is partially supported by the Spanish Research Agency (Agencia Estatal de Investigación) through the Grant IFT Centro de Excelencia Severo Ochoa No CEX2020- 001007-S, funded by MCIN/AEI/10.13039/501100011033. GT is partially funded by the STFC grant ST/T000813/1 2023-02-09T11:29:07.5381669 2023-01-30T15:44:32.3155305 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Ema Dimastrogiovanni 1 Matteo Fasiello 2 Ameek Malhotra 3 Gianmassimo Tasinato 0000-0002-9835-4864 4 62473__26440__ec42936b33cb47db901fd7ba6ac93c35.pdf 62473.pdf 2023-01-31T08:23:32.3927668 Output 1309310 application/pdf Accepted Manuscript true For the purpose of open access, the authors have applied a Creative Commons Attribution (CC BY) licence to any Author Accepted Manuscript version arising. true eng http://creativecommons.org/licenses/by/4.0/ |
title |
Enhancing gravitational wave anisotropies with peaked scalar sources |
spellingShingle |
Enhancing gravitational wave anisotropies with peaked scalar sources Gianmassimo Tasinato |
title_short |
Enhancing gravitational wave anisotropies with peaked scalar sources |
title_full |
Enhancing gravitational wave anisotropies with peaked scalar sources |
title_fullStr |
Enhancing gravitational wave anisotropies with peaked scalar sources |
title_full_unstemmed |
Enhancing gravitational wave anisotropies with peaked scalar sources |
title_sort |
Enhancing gravitational wave anisotropies with peaked scalar sources |
author_id_str_mv |
cb754b073d1e4949c5e3db97744d3301 |
author_id_fullname_str_mv |
cb754b073d1e4949c5e3db97744d3301_***_Gianmassimo Tasinato |
author |
Gianmassimo Tasinato |
author2 |
Ema Dimastrogiovanni Matteo Fasiello Ameek Malhotra Gianmassimo Tasinato |
format |
Journal article |
container_title |
Journal of Cosmology and Astroparticle Physics |
container_volume |
2023 |
container_issue |
01 |
container_start_page |
018 |
publishDate |
2023 |
institution |
Swansea University |
issn |
1475-7516 |
doi_str_mv |
10.1088/1475-7516/2023/01/018 |
publisher |
IOP Publishing |
college_str |
Faculty of Science and Engineering |
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|
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facultyofscienceandengineering |
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Faculty of Science and Engineering |
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facultyofscienceandengineering |
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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 |
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description |
Gravitational wave (GW) backgrounds of cosmological origin are expected to be nearly isotropic, with small anisotropies resembling those of the cosmic microwave background. We analyse the case of a scalar-induced GW background and clarify in the process the relation between two different approaches to calculating GW anisotropies. We focus on GW scenarios sourced by a significantly peaked scalar spectrum, which are frequently considered in the context of primordial black holes production. We show that the resulting GW anisotropies are characterised by a distinct frequency dependence. We explore the observational consequences concentrating on a GW background enhanced in the frequency band of space-based GW detectors. We study the detectability of the signal through both cross-correlations among different space-based GW detectors, and among GW and CMB experiments. |
published_date |
2023-01-13T04:22:07Z |
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1763754458317062144 |
score |
11.021648 |