Constraints on a possible evolution of mass density power-law index in strong gravitational lensing from cosmological data
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/10.1093/MNRAS/STX1791 http://hdl.handle.net/11449/175710 |
Resumo: | In this work, by using strong gravitational lensing (SGL) observations along with Type Ia Supernovae (Union2.1) and gamma-ray burst data (GRBs), we propose a new method to study a possible redshift evolution of γ(z), the mass density power-law index of strong gravitational lensing systems. In this analysis, we assume the validity of cosmic distance duality relation and the flat universe. In order to explore the γ(z) behaviour, three different parametrizations are considered, namely: (P1) γ(zl) = γ0 + γ1zl; (P2) γ(zl) = γ0 + γ1zl/(1 + zl); and (P3) γ(zl) = γ0 + γ1ln (1 + zl), where zl corresponds to lens redshift. If γ0 = 2 and γ1 = 0, the singular isothermal sphere model is recovered. Our method is performed on SGL sub-samples defined by different lens redshifts and velocity dispersions. For the former case, the results are in full agreement with each other, while a 1s tension between the sub-samples with low (≤250 km s-1) and high (> 250 km s-1) velocity dispersions was obtained on the (γ0-γ1) plane. By considering the complete SGL sample, we obtain γ0 ≈ 2 and γ1 ≈ 0 within 1s c.l. for all γ(z) parametrizations. However, we find the following best-fitting values of γ1: -0.085; -0.16; and -0.12 for P1, P2 and P3 parametrizations, respectively, suggesting a mild evolution for γ(z). By repeating the analysis with Type Ia Supernovae from Joint Light Analysis compilation, GRBs and SGL systems this mild evolution is reinforced. |
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Constraints on a possible evolution of mass density power-law index in strong gravitational lensing from cosmological dataDistance scaleGravitational lensing: strongSupernovae: generalIn this work, by using strong gravitational lensing (SGL) observations along with Type Ia Supernovae (Union2.1) and gamma-ray burst data (GRBs), we propose a new method to study a possible redshift evolution of γ(z), the mass density power-law index of strong gravitational lensing systems. In this analysis, we assume the validity of cosmic distance duality relation and the flat universe. In order to explore the γ(z) behaviour, three different parametrizations are considered, namely: (P1) γ(zl) = γ0 + γ1zl; (P2) γ(zl) = γ0 + γ1zl/(1 + zl); and (P3) γ(zl) = γ0 + γ1ln (1 + zl), where zl corresponds to lens redshift. If γ0 = 2 and γ1 = 0, the singular isothermal sphere model is recovered. Our method is performed on SGL sub-samples defined by different lens redshifts and velocity dispersions. For the former case, the results are in full agreement with each other, while a 1s tension between the sub-samples with low (≤250 km s-1) and high (> 250 km s-1) velocity dispersions was obtained on the (γ0-γ1) plane. By considering the complete SGL sample, we obtain γ0 ≈ 2 and γ1 ≈ 0 within 1s c.l. for all γ(z) parametrizations. However, we find the following best-fitting values of γ1: -0.085; -0.16; and -0.12 for P1, P2 and P3 parametrizations, respectively, suggesting a mild evolution for γ(z). By repeating the analysis with Type Ia Supernovae from Joint Light Analysis compilation, GRBs and SGL systems this mild evolution is reinforced.Departamento de Física Universidade Federal de SergipeDepartamento de Física Universidade Federal de Campina GrandeDepartamento de Física Téørica e Experimental Universidade Federal do Rio Grande do NorteUniversidade Estadual Paulista (Unesp) - DFQ Faculdade de Engenharia de GuaratinguetáDeen Dayal Upadhyaya College University of Delhi, Sector 3Universidade Estadual Paulista (Unesp) - DFQ Faculdade de Engenharia de GuaratinguetáUniversidade Federal de Sergipe (UFS)Universidade Federal de Campina GrandeUniversidade Federal do Rio Grande do NorteUniversidade Estadual Paulista (Unesp)University of DelhiHolanda, R. F.L.Pereira, S. H. [UNESP]Jain, Deepak2018-12-11T17:17:11Z2018-12-11T17:17:11Z2017-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article3079-3086application/pdfhttp://dx.doi.org/10.1093/MNRAS/STX1791Monthly Notices of the Royal Astronomical Society, v. 471, n. 3, p. 3079-3086, 2017.1365-29660035-8711http://hdl.handle.net/11449/17571010.1093/MNRAS/STX17912-s2.0-850399132002-s2.0-85039913200.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMonthly Notices of the Royal Astronomical Society2,3462,346info:eu-repo/semantics/openAccess2023-11-02T06:10:53Zoai:repositorio.unesp.br:11449/175710Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-11-02T06:10:53Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Constraints on a possible evolution of mass density power-law index in strong gravitational lensing from cosmological data |
title |
Constraints on a possible evolution of mass density power-law index in strong gravitational lensing from cosmological data |
spellingShingle |
Constraints on a possible evolution of mass density power-law index in strong gravitational lensing from cosmological data Holanda, R. F.L. Distance scale Gravitational lensing: strong Supernovae: general |
title_short |
Constraints on a possible evolution of mass density power-law index in strong gravitational lensing from cosmological data |
title_full |
Constraints on a possible evolution of mass density power-law index in strong gravitational lensing from cosmological data |
title_fullStr |
Constraints on a possible evolution of mass density power-law index in strong gravitational lensing from cosmological data |
title_full_unstemmed |
Constraints on a possible evolution of mass density power-law index in strong gravitational lensing from cosmological data |
title_sort |
Constraints on a possible evolution of mass density power-law index in strong gravitational lensing from cosmological data |
author |
Holanda, R. F.L. |
author_facet |
Holanda, R. F.L. Pereira, S. H. [UNESP] Jain, Deepak |
author_role |
author |
author2 |
Pereira, S. H. [UNESP] Jain, Deepak |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Federal de Sergipe (UFS) Universidade Federal de Campina Grande Universidade Federal do Rio Grande do Norte Universidade Estadual Paulista (Unesp) University of Delhi |
dc.contributor.author.fl_str_mv |
Holanda, R. F.L. Pereira, S. H. [UNESP] Jain, Deepak |
dc.subject.por.fl_str_mv |
Distance scale Gravitational lensing: strong Supernovae: general |
topic |
Distance scale Gravitational lensing: strong Supernovae: general |
description |
In this work, by using strong gravitational lensing (SGL) observations along with Type Ia Supernovae (Union2.1) and gamma-ray burst data (GRBs), we propose a new method to study a possible redshift evolution of γ(z), the mass density power-law index of strong gravitational lensing systems. In this analysis, we assume the validity of cosmic distance duality relation and the flat universe. In order to explore the γ(z) behaviour, three different parametrizations are considered, namely: (P1) γ(zl) = γ0 + γ1zl; (P2) γ(zl) = γ0 + γ1zl/(1 + zl); and (P3) γ(zl) = γ0 + γ1ln (1 + zl), where zl corresponds to lens redshift. If γ0 = 2 and γ1 = 0, the singular isothermal sphere model is recovered. Our method is performed on SGL sub-samples defined by different lens redshifts and velocity dispersions. For the former case, the results are in full agreement with each other, while a 1s tension between the sub-samples with low (≤250 km s-1) and high (> 250 km s-1) velocity dispersions was obtained on the (γ0-γ1) plane. By considering the complete SGL sample, we obtain γ0 ≈ 2 and γ1 ≈ 0 within 1s c.l. for all γ(z) parametrizations. However, we find the following best-fitting values of γ1: -0.085; -0.16; and -0.12 for P1, P2 and P3 parametrizations, respectively, suggesting a mild evolution for γ(z). By repeating the analysis with Type Ia Supernovae from Joint Light Analysis compilation, GRBs and SGL systems this mild evolution is reinforced. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-01-01 2018-12-11T17:17:11Z 2018-12-11T17:17:11Z |
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/10.1093/MNRAS/STX1791 Monthly Notices of the Royal Astronomical Society, v. 471, n. 3, p. 3079-3086, 2017. 1365-2966 0035-8711 http://hdl.handle.net/11449/175710 10.1093/MNRAS/STX1791 2-s2.0-85039913200 2-s2.0-85039913200.pdf |
url |
http://dx.doi.org/10.1093/MNRAS/STX1791 http://hdl.handle.net/11449/175710 |
identifier_str_mv |
Monthly Notices of the Royal Astronomical Society, v. 471, n. 3, p. 3079-3086, 2017. 1365-2966 0035-8711 10.1093/MNRAS/STX1791 2-s2.0-85039913200 2-s2.0-85039913200.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Monthly Notices of the Royal Astronomical Society 2,346 2,346 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
3079-3086 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 |
|
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1799964793382109184 |