Multi-wavelength landscape of the young galaxy cluster RXJ 1257.2+4738 at z = 0.866: II. Morphological properties

Studying the evolution of the morphological distribution of galaxies in different environments can provide important information about the effects of the environment and the physical mechanisms responsible for the morphological transformations. As part of a complete analysis of the young cluster RXJ...

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Detalhes bibliográficos
Autores: Pintos-Castro, I., Pović, Mirjana, Temporin, S.
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2016
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/146407
Acesso em linha:http://hdl.handle.net/10261/146407
Access Level:Acceso aberto
Palavra-chave:Galaxies: clusters: individual: RXJ 1257.2+4738
Galaxies: evolution
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spelling Multi-wavelength landscape of the young galaxy cluster RXJ 1257.2+4738 at z = 0.866: II. Morphological propertiesPintos-Castro, I.Pović, MirjanaTemporin, S.Galaxies: clusters: individual: RXJ 1257.2+4738Galaxies: evolutionStudying the evolution of the morphological distribution of galaxies in different environments can provide important information about the effects of the environment and the physical mechanisms responsible for the morphological transformations. As part of a complete analysis of the young cluster RXJ 1257+4738 at z ~ 0.9, in this work we study the morphological properties of its galaxies. We used non-parametric methods of morphological classification, as implemented in the galSVM code. The classification with the applied method was possible even using ground-based observations, as the r-band imaging from OSIRIS/GTC. We defined very conservative probability limits, taking into account the probability errors, to obtain a trustworthy classification. In this way we were able to classify ~30% of all cluster members and to separate between late-type (LT) and early-type (ET) galaxies. Additionally, when analysing the colour-magnitude diagram, we observed a significant population of blue ET galaxies among the classified ones. We discussed possible explanations for finding this population. Moreover, we studied different physical properties of LT, ET, and blue ET galaxies. They turn out to be comparable, with the exception of the stellar mass that shows that the red ET population is more massive. We also analysed the morphology-density and morphology-radius relations observing that, only when considering the morphological separation between ET and LT galaxies, a mild classical behaviour is obtained. RXJ 1257+4738 is a young galaxy cluster, showing a clumpy structure, which is still in the process of formation, and which could explain the lack of some of the standard morphological relations. This makes this cluster a very attractive case for obtaining higher resolution data and for studying the morphological properties of the entire cluster in more detail and their relation to the environment. © 2016 ESO.I.P.C. acknowledges support from the Faculty of the European Space Astronomy Centre (ESAC). M.P. acknowledges financial support from JAE-Doc program of the Spanish National Research Council (CSIC), co-funded by the European Social Fund. This research has been supported by the Spanish Ministry of Economy and Competitiveness (MINECO) under grants AYA2014-58861-C3-1-P, AYA2014-58861-C3-3-P, AYA2011-29517-C03-01, AYA2010-15169 and AYA2013-42227-P, and by the Junta de Andalucia under grant TIC 114.Peer ReviewedEDP SciencesEuropean Space Astronomy CentreConsejo Superior de Investigaciones Científicas (España)Ministerio de Economía y Competitividad (España)Junta de AndalucíaEuropean CommissionConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2017201720162017info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/146407reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2014-58861-C3-1-Pinfo:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2014-58861-C3-3-Pinfo:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2013-42227-PSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1464072026-05-22T06:33:51Z
dc.title.none.fl_str_mv Multi-wavelength landscape of the young galaxy cluster RXJ 1257.2+4738 at z = 0.866: II. Morphological properties
title Multi-wavelength landscape of the young galaxy cluster RXJ 1257.2+4738 at z = 0.866: II. Morphological properties
spellingShingle Multi-wavelength landscape of the young galaxy cluster RXJ 1257.2+4738 at z = 0.866: II. Morphological properties
Pintos-Castro, I.
Galaxies: clusters: individual: RXJ 1257.2+4738
Galaxies: evolution
title_short Multi-wavelength landscape of the young galaxy cluster RXJ 1257.2+4738 at z = 0.866: II. Morphological properties
title_full Multi-wavelength landscape of the young galaxy cluster RXJ 1257.2+4738 at z = 0.866: II. Morphological properties
title_fullStr Multi-wavelength landscape of the young galaxy cluster RXJ 1257.2+4738 at z = 0.866: II. Morphological properties
title_full_unstemmed Multi-wavelength landscape of the young galaxy cluster RXJ 1257.2+4738 at z = 0.866: II. Morphological properties
title_sort Multi-wavelength landscape of the young galaxy cluster RXJ 1257.2+4738 at z = 0.866: II. Morphological properties
dc.creator.none.fl_str_mv Pintos-Castro, I.
Pović, Mirjana
Temporin, S.
author Pintos-Castro, I.
author_facet Pintos-Castro, I.
Pović, Mirjana
Temporin, S.
author_role author
author2 Pović, Mirjana
Temporin, S.
author2_role author
author
dc.contributor.none.fl_str_mv European Space Astronomy Centre
Consejo Superior de Investigaciones Científicas (España)
Ministerio de Economía y Competitividad (España)
Junta de Andalucía
European Commission
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Galaxies: clusters: individual: RXJ 1257.2+4738
Galaxies: evolution
topic Galaxies: clusters: individual: RXJ 1257.2+4738
Galaxies: evolution
description Studying the evolution of the morphological distribution of galaxies in different environments can provide important information about the effects of the environment and the physical mechanisms responsible for the morphological transformations. As part of a complete analysis of the young cluster RXJ 1257+4738 at z ~ 0.9, in this work we study the morphological properties of its galaxies. We used non-parametric methods of morphological classification, as implemented in the galSVM code. The classification with the applied method was possible even using ground-based observations, as the r-band imaging from OSIRIS/GTC. We defined very conservative probability limits, taking into account the probability errors, to obtain a trustworthy classification. In this way we were able to classify ~30% of all cluster members and to separate between late-type (LT) and early-type (ET) galaxies. Additionally, when analysing the colour-magnitude diagram, we observed a significant population of blue ET galaxies among the classified ones. We discussed possible explanations for finding this population. Moreover, we studied different physical properties of LT, ET, and blue ET galaxies. They turn out to be comparable, with the exception of the stellar mass that shows that the red ET population is more massive. We also analysed the morphology-density and morphology-radius relations observing that, only when considering the morphological separation between ET and LT galaxies, a mild classical behaviour is obtained. RXJ 1257+4738 is a young galaxy cluster, showing a clumpy structure, which is still in the process of formation, and which could explain the lack of some of the standard morphological relations. This makes this cluster a very attractive case for obtaining higher resolution data and for studying the morphological properties of the entire cluster in more detail and their relation to the environment. © 2016 ESO.
publishDate 2016
dc.date.none.fl_str_mv 2016
2017
2017
2017
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
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status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/146407
url http://hdl.handle.net/10261/146407
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
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info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2014-58861-C3-1-P
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2014-58861-C3-3-P
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2013-42227-P
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dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
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