Robust neutrino constraints by combining low redshift observations with the CMB

We illustrate how recently improved low-redshift cosmological measurements can tighten constraints on neutrino properties. In particular we examine the impact of the assumed cosmological model on the constraints. We first consider the new HST H0 = 74.2±3.6 measurement by Riess et al. (2009) and the...

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Detalles Bibliográficos
Autores: Reid, Beth A., Verde, Licia, Jiménez, Raúl (Jiménez Tellado), Mena, Olga
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2010
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/101141
Acceso en línea:https://hdl.handle.net/2445/101141
Access Level:acceso abierto
Palabra clave:Cosmologia
Neutrins
Supernoves
Cosmology
Neutrinos
Supernovae
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spelling Robust neutrino constraints by combining low redshift observations with the CMBReid, Beth A.Verde, LiciaJiménez, Raúl (Jiménez Tellado)Mena, OlgaCosmologiaNeutrinsSupernovesCosmologyNeutrinosSupernovaeWe illustrate how recently improved low-redshift cosmological measurements can tighten constraints on neutrino properties. In particular we examine the impact of the assumed cosmological model on the constraints. We first consider the new HST H0 = 74.2±3.6 measurement by Riess et al. (2009) and the σ8(Ωm/0.25)0.41 = 0.832±0.033 constraint from Rozo et al. (2009) derived from the SDSS maxBCG Cluster Catalog. In a ΛCDM model and when combined with WMAP5 constraints, these low-redshift measurements constrain ∑mν < 0.4 eV at the 95% confidence level. This bound does not relax when allowing for the running of the spectral index or for primordial tensor perturbations. When adding also Supernovae and BAO constraints, we obtain a 95% upper limit of ∑mν < 0.3eV. We test the sensitivity of the neutrino mass constraint to the assumed expansion history by both allowing a dark energy equation of state parameter w≠−1 and by studying a model with coupling between dark energy and dark matter, which allows for variation in w, Ωk, and dark coupling strength ξ. When combining CMB, H0 and the SDSS LRG halo power spectrum from Reid et al. 2009, we find that in this very general model, ∑mν < 0.51 eV with 95% confidence. If we allow the number of relativistic species Nrel to vary in a ΛCDM model with ∑mν = 0, we find Nrel = 3.76+0.63−0.68(+1.38−1.21) for the 68% and 95% confidence intervals. We also report prior-independent constraints, which are in excellent agreement with the Bayesian constraints.Institute of Physics (IOP)2016201620102016info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion21 p.application/pdfhttps://hdl.handle.net/2445/101141Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: http://dx.doi.org/10.1088/1475-7516/2010/01/003Journal Of Cosmology And Astroparticle Physics, 2010, vol. 1001, num. 3http://dx.doi.org/10.1088/1475-7516/2010/01/003info:eu-repo/grantAgreement/EC/FP7/202182(c) IOP Publishing Ltd and Sissa Medialab srl, 2010info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1011412026-05-29T05:05:01Z
dc.title.none.fl_str_mv Robust neutrino constraints by combining low redshift observations with the CMB
title Robust neutrino constraints by combining low redshift observations with the CMB
spellingShingle Robust neutrino constraints by combining low redshift observations with the CMB
Reid, Beth A.
Cosmologia
Neutrins
Supernoves
Cosmology
Neutrinos
Supernovae
title_short Robust neutrino constraints by combining low redshift observations with the CMB
title_full Robust neutrino constraints by combining low redshift observations with the CMB
title_fullStr Robust neutrino constraints by combining low redshift observations with the CMB
title_full_unstemmed Robust neutrino constraints by combining low redshift observations with the CMB
title_sort Robust neutrino constraints by combining low redshift observations with the CMB
dc.creator.none.fl_str_mv Reid, Beth A.
Verde, Licia
Jiménez, Raúl (Jiménez Tellado)
Mena, Olga
author Reid, Beth A.
author_facet Reid, Beth A.
Verde, Licia
Jiménez, Raúl (Jiménez Tellado)
Mena, Olga
author_role author
author2 Verde, Licia
Jiménez, Raúl (Jiménez Tellado)
Mena, Olga
author2_role author
author
author
dc.subject.none.fl_str_mv Cosmologia
Neutrins
Supernoves
Cosmology
Neutrinos
Supernovae
topic Cosmologia
Neutrins
Supernoves
Cosmology
Neutrinos
Supernovae
description We illustrate how recently improved low-redshift cosmological measurements can tighten constraints on neutrino properties. In particular we examine the impact of the assumed cosmological model on the constraints. We first consider the new HST H0 = 74.2±3.6 measurement by Riess et al. (2009) and the σ8(Ωm/0.25)0.41 = 0.832±0.033 constraint from Rozo et al. (2009) derived from the SDSS maxBCG Cluster Catalog. In a ΛCDM model and when combined with WMAP5 constraints, these low-redshift measurements constrain ∑mν < 0.4 eV at the 95% confidence level. This bound does not relax when allowing for the running of the spectral index or for primordial tensor perturbations. When adding also Supernovae and BAO constraints, we obtain a 95% upper limit of ∑mν < 0.3eV. We test the sensitivity of the neutrino mass constraint to the assumed expansion history by both allowing a dark energy equation of state parameter w≠−1 and by studying a model with coupling between dark energy and dark matter, which allows for variation in w, Ωk, and dark coupling strength ξ. When combining CMB, H0 and the SDSS LRG halo power spectrum from Reid et al. 2009, we find that in this very general model, ∑mν < 0.51 eV with 95% confidence. If we allow the number of relativistic species Nrel to vary in a ΛCDM model with ∑mν = 0, we find Nrel = 3.76+0.63−0.68(+1.38−1.21) for the 68% and 95% confidence intervals. We also report prior-independent constraints, which are in excellent agreement with the Bayesian constraints.
publishDate 2010
dc.date.none.fl_str_mv 2010
2016
2016
2016
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/101141
url https://hdl.handle.net/2445/101141
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: http://dx.doi.org/10.1088/1475-7516/2010/01/003
Journal Of Cosmology And Astroparticle Physics, 2010, vol. 1001, num. 3
http://dx.doi.org/10.1088/1475-7516/2010/01/003
info:eu-repo/grantAgreement/EC/FP7/202182
dc.rights.none.fl_str_mv (c) IOP Publishing Ltd and Sissa Medialab srl, 2010
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) IOP Publishing Ltd and Sissa Medialab srl, 2010
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 21 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 (Institut de Ciències del Cosmos (ICCUB))
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 15,811543

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