Testing the cosmic conservation of photon number with type Ia supernovae and ages of old objects
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1007/s10714-017-2317-5 http://hdl.handle.net/11449/175464 |
Resumo: | In this paper, we obtain luminosity distances by using ages of 32 old passive galaxies distributed over the redshift interval 0.11 < z< 1.84 and test the cosmic conservation of photon number by comparing them with 580 distance moduli of type Ia supernovae (SNe Ia) from the so-called Union 2.1 compilation. Our analyses are based on the fact that the method of obtaining ages of galaxies relies on the detailed shape of galaxy spectra but not on galaxy luminosity. Possible departures from cosmic conservation of photon number is parametrized by τ(z) = 2 ε z and τ(z) = ε z/ (1 + z) (for ε = 0 the conservation of photon number is recovered). We find ε=0.016-0.075+0.078 from the first parametrization and ε=-0.18-0.24+0.25 from the second parametrization, both limits at 95% c.l. In this way, no significant departure from cosmic conservation of photon number is verified. In addition, by considering the total age as inferred from Planck (2015) analysis, we find the incubation time ti n c= 1.66 ± 0.29 Gyr and ti n c= 1.23 ± 0.27 Gyr at 68% c.l. for each parametrization, respectively. |
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Repositório Institucional da UNESP |
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Testing the cosmic conservation of photon number with type Ia supernovae and ages of old objectsCosmic opacityGalaxy agesScale distanceType Ia SupernovaeIn this paper, we obtain luminosity distances by using ages of 32 old passive galaxies distributed over the redshift interval 0.11 < z< 1.84 and test the cosmic conservation of photon number by comparing them with 580 distance moduli of type Ia supernovae (SNe Ia) from the so-called Union 2.1 compilation. Our analyses are based on the fact that the method of obtaining ages of galaxies relies on the detailed shape of galaxy spectra but not on galaxy luminosity. Possible departures from cosmic conservation of photon number is parametrized by τ(z) = 2 ε z and τ(z) = ε z/ (1 + z) (for ε = 0 the conservation of photon number is recovered). We find ε=0.016-0.075+0.078 from the first parametrization and ε=-0.18-0.24+0.25 from the second parametrization, both limits at 95% c.l. In this way, no significant departure from cosmic conservation of photon number is verified. In addition, by considering the total age as inferred from Planck (2015) analysis, we find the incubation time ti n c= 1.66 ± 0.29 Gyr and ti n c= 1.23 ± 0.27 Gyr at 68% c.l. for each parametrization, respectively.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Universidade Estadual Paulista (Unesp), Câmpus Experimental de ItapevaFaculdade de Engenharia Guaratinguetá Universidade Estadual Paulista (Unesp)Departamento de Física Universidade Federal de SergipeDepartamento de Física Universidade Federal de Campina GrandeDepartamento de Física Universidade Federal do Rio Grande do NorteDepartamento de Física Universidade do Estado do Rio Grande do NorteUniversidade Estadual Paulista (Unesp), Câmpus Experimental de ItapevaFaculdade de Engenharia Guaratinguetá Universidade Estadual Paulista (Unesp)FAPESP: 2013/26258-4FAPESP: 2017/05859-7CNPq: 303734/2014-0CNPq: 478524/2013-7Universidade Estadual Paulista (Unesp)Universidade Federal de Sergipe (UFS)Universidade Federal de Campina GrandeUniversidade Federal do Rio Grande do NorteUniversidade do Estado do Rio Grande do NorteJesus, J. F. [UNESP]Holanda, R. F.L.Dantas, M. A.2018-12-11T17:15:56Z2018-12-11T17:15:56Z2017-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://dx.doi.org/10.1007/s10714-017-2317-5General Relativity and Gravitation, v. 49, n. 12, 2017.1572-95320001-7701http://hdl.handle.net/11449/17546410.1007/s10714-017-2317-52-s2.0-850334573352-s2.0-85033457335.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengGeneral Relativity and Gravitation0,5980,598info:eu-repo/semantics/openAccess2024-01-21T06:24:39Zoai:repositorio.unesp.br:11449/175464Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T23:36:01.574345Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Testing the cosmic conservation of photon number with type Ia supernovae and ages of old objects |
title |
Testing the cosmic conservation of photon number with type Ia supernovae and ages of old objects |
spellingShingle |
Testing the cosmic conservation of photon number with type Ia supernovae and ages of old objects Jesus, J. F. [UNESP] Cosmic opacity Galaxy ages Scale distance Type Ia Supernovae |
title_short |
Testing the cosmic conservation of photon number with type Ia supernovae and ages of old objects |
title_full |
Testing the cosmic conservation of photon number with type Ia supernovae and ages of old objects |
title_fullStr |
Testing the cosmic conservation of photon number with type Ia supernovae and ages of old objects |
title_full_unstemmed |
Testing the cosmic conservation of photon number with type Ia supernovae and ages of old objects |
title_sort |
Testing the cosmic conservation of photon number with type Ia supernovae and ages of old objects |
author |
Jesus, J. F. [UNESP] |
author_facet |
Jesus, J. F. [UNESP] Holanda, R. F.L. Dantas, M. A. |
author_role |
author |
author2 |
Holanda, R. F.L. Dantas, M. A. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade Federal de Sergipe (UFS) Universidade Federal de Campina Grande Universidade Federal do Rio Grande do Norte Universidade do Estado do Rio Grande do Norte |
dc.contributor.author.fl_str_mv |
Jesus, J. F. [UNESP] Holanda, R. F.L. Dantas, M. A. |
dc.subject.por.fl_str_mv |
Cosmic opacity Galaxy ages Scale distance Type Ia Supernovae |
topic |
Cosmic opacity Galaxy ages Scale distance Type Ia Supernovae |
description |
In this paper, we obtain luminosity distances by using ages of 32 old passive galaxies distributed over the redshift interval 0.11 < z< 1.84 and test the cosmic conservation of photon number by comparing them with 580 distance moduli of type Ia supernovae (SNe Ia) from the so-called Union 2.1 compilation. Our analyses are based on the fact that the method of obtaining ages of galaxies relies on the detailed shape of galaxy spectra but not on galaxy luminosity. Possible departures from cosmic conservation of photon number is parametrized by τ(z) = 2 ε z and τ(z) = ε z/ (1 + z) (for ε = 0 the conservation of photon number is recovered). We find ε=0.016-0.075+0.078 from the first parametrization and ε=-0.18-0.24+0.25 from the second parametrization, both limits at 95% c.l. In this way, no significant departure from cosmic conservation of photon number is verified. In addition, by considering the total age as inferred from Planck (2015) analysis, we find the incubation time ti n c= 1.66 ± 0.29 Gyr and ti n c= 1.23 ± 0.27 Gyr at 68% c.l. for each parametrization, respectively. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-12-01 2018-12-11T17:15:56Z 2018-12-11T17:15:56Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1007/s10714-017-2317-5 General Relativity and Gravitation, v. 49, n. 12, 2017. 1572-9532 0001-7701 http://hdl.handle.net/11449/175464 10.1007/s10714-017-2317-5 2-s2.0-85033457335 2-s2.0-85033457335.pdf |
url |
http://dx.doi.org/10.1007/s10714-017-2317-5 http://hdl.handle.net/11449/175464 |
identifier_str_mv |
General Relativity and Gravitation, v. 49, n. 12, 2017. 1572-9532 0001-7701 10.1007/s10714-017-2317-5 2-s2.0-85033457335 2-s2.0-85033457335.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
General Relativity and Gravitation 0,598 0,598 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129534825857024 |