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Enhancing gravitational wave anisotropies with peaked scalar sources

Ema Dimastrogiovanni, Matteo Fasiello, Ameek Malhotra, Gianmassimo Tasinato Orcid Logo

Journal of Cosmology and Astroparticle Physics, Volume: 2023, Issue: 01, Start page: 018

Swansea University Author: Gianmassimo Tasinato Orcid Logo

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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...

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Published in: Journal of Cosmology and Astroparticle Physics
ISSN: 1475-7516
Published: IOP Publishing 2023
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa62473
first_indexed 2023-01-30T15:47:23Z
last_indexed 2023-02-10T04:18:20Z
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spelling 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 BGPS 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 Biosciences Geography and Physics School COLLEGE CODE BGPS 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
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 1
active_str 0
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 2023-01-13T14:22:08Z
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score 11.048042

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