Dark energy, D-branes and pulsar timing arrays

Chowdhury, Debika; Tasinato, Gianmassimo; Carrasco, Ivonne Zavala

doi:10.1088/1475-7516/2023/11/090

Journal article 137 views 39 downloads

Dark energy, D-branes and pulsar timing arrays

Debika Chowdhury, Gianmassimo Tasinato

, Ivonne Zavala Carrasco

Journal of Cosmology and Astroparticle Physics, Volume: 2023, Issue: 11, Start page: 090

Swansea University Authors: Debika Chowdhury, Gianmassimo Tasinato , Ivonne Zavala Carrasco

PDF | Version of Record

© 2023 The Author(s). Published by IOP Publishing Ltd on behalf of Sissa Medialab. Distributed under the terms of a Creative Commons Attribution 4.0 International License (CC BY 4.0).
Download (1.51MB)

Check full text

DOI (Published version): 10.1088/1475-7516/2023/11/090

Abstract

Several pulsar timing array (PTA) collaborations recently announced the first detection of a stochastic gravitational wave (GW) background, leaving open the question of its source. We explore the possibility that it originates from cosmic inflation, a guaranteed source of primordial GW. The inflatio...

Full description

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/cronfa65120
Tags:	Add Tag No Tags, Be the first to tag this record!

first_indexed	2023-12-19T16:53:32Z
last_indexed	2023-12-19T16:53:32Z
id	cronfa65120
recordtype	SURis
fullrecord	<?xml version="1.0" encoding="utf-8"?><rfc1807 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><bib-version>v2</bib-version><id>65120</id><entry>2023-11-26</entry><title>Dark energy, D-branes and pulsar timing arrays</title><swanseaauthors><author><sid>c726433050640576f6d649ed6f654826</sid><firstname>Debika</firstname><surname>Chowdhury</surname><name>Debika Chowdhury</name><active>true</active><ethesisStudent>false</ethesisStudent></author><author><sid>cb754b073d1e4949c5e3db97744d3301</sid><ORCID>0000-0002-9835-4864</ORCID><firstname>Gianmassimo</firstname><surname>Tasinato</surname><name>Gianmassimo Tasinato</name><active>true</active><ethesisStudent>false</ethesisStudent></author><author><sid>2fb8d4bb665e9a89d3b3478c17f646f8</sid><ORCID>0000-0002-5589-9928</ORCID><firstname>Ivonne</firstname><surname>Zavala Carrasco</surname><name>Ivonne Zavala Carrasco</name><active>true</active><ethesisStudent>false</ethesisStudent></author></swanseaauthors><date>2023-11-26</date><deptcode>SPH</deptcode><abstract>Several pulsar timing array (PTA) collaborations recently announced the first detection of a stochastic gravitational wave (GW) background, leaving open the question of its source. We explore the possibility that it originates from cosmic inflation, a guaranteed source of primordial GW. The inflationary GW background amplitude is enhanced at PTA scales by a non-standard early cosmological evolution, driven by Dirac-Born-Infeld (DBI) scalar dynamics motivated by string theory. The resulting GW energy density has a broken power-law frequency profile, entering the PTA band with a peak amplitude consistent with the recent GW detection. After this initial DBI kination epoch, the dynamics starts a new phase mainly controlled by the scalar potential. It provides a realization of an early dark energy scenario aimed at relaxing the H0 tension, and a late dark energy model which explains the current cosmological acceleration with no need of a cosmological constant. Hence our mechanism — besides providing a possible explanation for the recent PTA results — connects them with testable properties of the physics of the dark universe.</abstract><type>Journal Article</type><journal>Journal of Cosmology and Astroparticle Physics</journal><volume>2023</volume><journalNumber>11</journalNumber><paginationStart>090</paginationStart><paginationEnd/><publisher>IOP Publishing</publisher><placeOfPublication/><isbnPrint/><isbnElectronic/><issnPrint/><issnElectronic>1475-7516</issnElectronic><keywords>Dark energy theory, gravitational waves / theory, Gravitational waves in GRand beyond: theory , physics of the early universe</keywords><publishedDay>24</publishedDay><publishedMonth>11</publishedMonth><publishedYear>2023</publishedYear><publishedDate>2023-11-24</publishedDate><doi>10.1088/1475-7516/2023/11/090</doi><url>http://dx.doi.org/10.1088/1475-7516/2023/11/090</url><notes/><college>COLLEGE NANME</college><department>Physics</department><CollegeCode>COLLEGE CODE</CollegeCode><DepartmentCode>SPH</DepartmentCode><institution>Swansea University</institution><apcterm/><funders>The authors are partially funded by the STFC grant ST/T000813/1.</funders><projectreference/><lastEdited>2023-12-19T16:57:46.6846268</lastEdited><Created>2023-11-26T13:53:28.4310614</Created><path><level id="1">Faculty of Science and Engineering</level><level id="2">School of Biosciences, Geography and Physics - Physics</level></path><authors><author><firstname>Debika</firstname><surname>Chowdhury</surname><order>1</order></author><author><firstname>Gianmassimo</firstname><surname>Tasinato</surname><orcid>0000-0002-9835-4864</orcid><order>2</order></author><author><firstname>Ivonne</firstname><surname>Zavala Carrasco</surname><orcid>0000-0002-5589-9928</orcid><order>3</order></author></authors><documents><document><filename>65120__29297__0c659e7deedf4ca7bc962e04017d52f4.pdf</filename><originalFilename>65120.VOR.pdf</originalFilename><uploaded>2023-12-19T16:52:11.8838391</uploaded><type>Output</type><contentLength>1586548</contentLength><contentType>application/pdf</contentType><version>Version of Record</version><cronfaStatus>true</cronfaStatus><documentNotes>© 2023 The Author(s). Published by IOP Publishing Ltd on behalf of Sissa Medialab. Distributed under the terms of a Creative Commons Attribution 4.0 International License (CC BY 4.0).</documentNotes><copyrightCorrect>true</copyrightCorrect><language>eng</language><licence>https://creativecommons.org/licenses/by/4.0/</licence></document></documents><OutputDurs/></rfc1807>
spelling	v2 65120 2023-11-26 Dark energy, D-branes and pulsar timing arrays c726433050640576f6d649ed6f654826 Debika Chowdhury Debika Chowdhury 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 2023-11-26 SPH Several pulsar timing array (PTA) collaborations recently announced the first detection of a stochastic gravitational wave (GW) background, leaving open the question of its source. We explore the possibility that it originates from cosmic inflation, a guaranteed source of primordial GW. The inflationary GW background amplitude is enhanced at PTA scales by a non-standard early cosmological evolution, driven by Dirac-Born-Infeld (DBI) scalar dynamics motivated by string theory. The resulting GW energy density has a broken power-law frequency profile, entering the PTA band with a peak amplitude consistent with the recent GW detection. After this initial DBI kination epoch, the dynamics starts a new phase mainly controlled by the scalar potential. It provides a realization of an early dark energy scenario aimed at relaxing the H0 tension, and a late dark energy model which explains the current cosmological acceleration with no need of a cosmological constant. Hence our mechanism — besides providing a possible explanation for the recent PTA results — connects them with testable properties of the physics of the dark universe. Journal Article Journal of Cosmology and Astroparticle Physics 2023 11 090 IOP Publishing 1475-7516 Dark energy theory, gravitational waves / theory, Gravitational waves in GRand beyond: theory , physics of the early universe 24 11 2023 2023-11-24 10.1088/1475-7516/2023/11/090 http://dx.doi.org/10.1088/1475-7516/2023/11/090 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University The authors are partially funded by the STFC grant ST/T000813/1. 2023-12-19T16:57:46.6846268 2023-11-26T13:53:28.4310614 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Debika Chowdhury 1 Gianmassimo Tasinato 0000-0002-9835-4864 2 Ivonne Zavala Carrasco 0000-0002-5589-9928 3 65120__29297__0c659e7deedf4ca7bc962e04017d52f4.pdf 65120.VOR.pdf 2023-12-19T16:52:11.8838391 Output 1586548 application/pdf Version of Record true © 2023 The Author(s). Published by IOP Publishing Ltd on behalf of Sissa Medialab. 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	Dark energy, D-branes and pulsar timing arrays
spellingShingle	Dark energy, D-branes and pulsar timing arrays Debika Chowdhury Gianmassimo Tasinato Ivonne Zavala Carrasco
title_short	Dark energy, D-branes and pulsar timing arrays
title_full	Dark energy, D-branes and pulsar timing arrays
title_fullStr	Dark energy, D-branes and pulsar timing arrays
title_full_unstemmed	Dark energy, D-branes and pulsar timing arrays
title_sort	Dark energy, D-branes and pulsar timing arrays
author_id_str_mv	c726433050640576f6d649ed6f654826 cb754b073d1e4949c5e3db97744d3301 2fb8d4bb665e9a89d3b3478c17f646f8
author_id_fullname_str_mv	c726433050640576f6d649ed6f654826_*_Debika Chowdhury cb754b073d1e4949c5e3db97744d3301__Gianmassimo Tasinato 2fb8d4bb665e9a89d3b3478c17f646f8_**_Ivonne Zavala Carrasco
author	Debika Chowdhury Gianmassimo Tasinato Ivonne Zavala Carrasco
author2	Debika Chowdhury Gianmassimo Tasinato Ivonne Zavala Carrasco
format	Journal article
container_title	Journal of Cosmology and Astroparticle Physics
container_volume	2023
container_issue	11
container_start_page	090
publishDate	2023
institution	Swansea University
issn	1475-7516
doi_str_mv	10.1088/1475-7516/2023/11/090
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
url	http://dx.doi.org/10.1088/1475-7516/2023/11/090
document_store_str	1
active_str	0
description	Several pulsar timing array (PTA) collaborations recently announced the first detection of a stochastic gravitational wave (GW) background, leaving open the question of its source. We explore the possibility that it originates from cosmic inflation, a guaranteed source of primordial GW. The inflationary GW background amplitude is enhanced at PTA scales by a non-standard early cosmological evolution, driven by Dirac-Born-Infeld (DBI) scalar dynamics motivated by string theory. The resulting GW energy density has a broken power-law frequency profile, entering the PTA band with a peak amplitude consistent with the recent GW detection. After this initial DBI kination epoch, the dynamics starts a new phase mainly controlled by the scalar potential. It provides a realization of an early dark energy scenario aimed at relaxing the H0 tension, and a late dark energy model which explains the current cosmological acceleration with no need of a cosmological constant. Hence our mechanism — besides providing a possible explanation for the recent PTA results — connects them with testable properties of the physics of the dark universe.
published_date	2023-11-24T16:57:47Z
_version_	1785730242171633664
score	11.013148

Dark energy, D-branes and pulsar timing arrays

Similar Items