Local measurement of $Lambda$ using pulsar timing arrays

We consider the propagation of gravitational waves (GWs) in de Sitter spacetime and how a non-zero value of the cosmological constant might affect their detection in pulsar timing arrays (PTAs). If Λ ≠ 0, the waves are anharmonic in Friedmann-Robertson-Walker coordinates, and although this effect is...

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Detalhes bibliográficos
Autores: Espriu, D. (Domènec), Puigdomènech Bourgon, Daniel
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2013
País:España
Recursos:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositório:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/119131
Acesso em linha:https://hdl.handle.net/2445/119131
Access Level:Acceso aberto
Palavra-chave:Ones gravitacionals
Estels de neutrons
Gravitational waves
Neutron stars
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spelling Local measurement of $Lambda$ using pulsar timing arraysEspriu, D. (Domènec)Puigdomènech Bourgon, DanielOnes gravitacionalsEstels de neutronsGravitational wavesNeutron starsWe consider the propagation of gravitational waves (GWs) in de Sitter spacetime and how a non-zero value of the cosmological constant might affect their detection in pulsar timing arrays (PTAs). If Λ ≠ 0, the waves are anharmonic in Friedmann-Robertson-Walker coordinates, and although this effect is very small it gives rise to noticeable consequences for GWs originating in extragalactic sources such as spiraling black hole binaries. The results indicate that the timing residuals induced by GWs from such sources in PTAs will show a peculiar angular dependence with a marked enhancement around a particular value of the angle subtended by the source and the pulsars, depending mainly on the actual value of the cosmological constant and the distance to the source. The position of the peak could represent a gauge of the value of Λ. The enhancement that the new effect brings about could facilitate the first direct detection of GWs while representing a local measurement of Λ.Institute of Physics (IOP)2018201820132018info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion7 p.application/pdfhttps://hdl.handle.net/2445/119131Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.1088/0004-637X/764/2/163Astrophysical Journal, 2013, vol. 764, num. 2https://doi.org/10.1088/0004-637X/764/2/163(c) American Astronomical Society, 2013info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1191312026-05-29T05:05:01Z
dc.title.none.fl_str_mv Local measurement of $Lambda$ using pulsar timing arrays
title Local measurement of $Lambda$ using pulsar timing arrays
spellingShingle Local measurement of $Lambda$ using pulsar timing arrays
Espriu, D. (Domènec)
Ones gravitacionals
Estels de neutrons
Gravitational waves
Neutron stars
title_short Local measurement of $Lambda$ using pulsar timing arrays
title_full Local measurement of $Lambda$ using pulsar timing arrays
title_fullStr Local measurement of $Lambda$ using pulsar timing arrays
title_full_unstemmed Local measurement of $Lambda$ using pulsar timing arrays
title_sort Local measurement of $Lambda$ using pulsar timing arrays
dc.creator.none.fl_str_mv Espriu, D. (Domènec)
Puigdomènech Bourgon, Daniel
author Espriu, D. (Domènec)
author_facet Espriu, D. (Domènec)
Puigdomènech Bourgon, Daniel
author_role author
author2 Puigdomènech Bourgon, Daniel
author2_role author
dc.subject.none.fl_str_mv Ones gravitacionals
Estels de neutrons
Gravitational waves
Neutron stars
topic Ones gravitacionals
Estels de neutrons
Gravitational waves
Neutron stars
description We consider the propagation of gravitational waves (GWs) in de Sitter spacetime and how a non-zero value of the cosmological constant might affect their detection in pulsar timing arrays (PTAs). If Λ ≠ 0, the waves are anharmonic in Friedmann-Robertson-Walker coordinates, and although this effect is very small it gives rise to noticeable consequences for GWs originating in extragalactic sources such as spiraling black hole binaries. The results indicate that the timing residuals induced by GWs from such sources in PTAs will show a peculiar angular dependence with a marked enhancement around a particular value of the angle subtended by the source and the pulsars, depending mainly on the actual value of the cosmological constant and the distance to the source. The position of the peak could represent a gauge of the value of Λ. The enhancement that the new effect brings about could facilitate the first direct detection of GWs while representing a local measurement of Λ.
publishDate 2013
dc.date.none.fl_str_mv 2013
2018
2018
2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/119131
url https://hdl.handle.net/2445/119131
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1088/0004-637X/764/2/163
Astrophysical Journal, 2013, vol. 764, num. 2
https://doi.org/10.1088/0004-637X/764/2/163
dc.rights.none.fl_str_mv (c) American Astronomical Society, 2013
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) American Astronomical Society, 2013
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 7 p.
application/pdf
dc.publisher.none.fl_str_mv Institute of Physics (IOP)
publisher.none.fl_str_mv Institute of Physics (IOP)
dc.source.none.fl_str_mv Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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