Mild evolution of the stellar metallicity gradients of disc galaxies

The metallicity gradients of the stellar populations in disc galaxies and their evolution store relevant information on the disc formation history and on those processes which could mix stars a posteriori, such as migration, bars and/or galaxy-galaxy interactions. Aims. We aim to investigate the evo...

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Detalles Bibliográficos
Autores: Tissera, P.B, MacHado, R.E.G, Vílchez Medina, José Manuel, Pedrosa, S.E, Sanchez-Blazquez, P, Varela, S.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2017
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/167385
Acceso en línea:http://hdl.handle.net/10261/167385
Access Level:acceso abierto
Palabra clave:Galaxies: ISM
Galaxies: evolution
Galaxies: formation
Galaxies: abundances
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network_name_str España
repository_id_str
spelling Mild evolution of the stellar metallicity gradients of disc galaxiesTissera, P.BMacHado, R.E.GVílchez Medina, José ManuelPedrosa, S.ESanchez-Blazquez, PVarela, S.Galaxies: ISMGalaxies: evolutionGalaxies: formationGalaxies: abundancesThe metallicity gradients of the stellar populations in disc galaxies and their evolution store relevant information on the disc formation history and on those processes which could mix stars a posteriori, such as migration, bars and/or galaxy-galaxy interactions. Aims. We aim to investigate the evolution of the metallicity gradients of the whole stellar populations in disc components of simulated galaxies in a cosmological context. Methods. We analyse simulated disc galaxies selected from a cosmological hydrodynamical simulation that includes chemical evolution and a physically motivated supernova feedback capable of driving mass-loaded galactic winds. Results. We detect a mild evolution with redshift in the metallicity slopes of-0.02 ± 0.01 dex kpc-1 from z ~ 1. If the metallicity profiles are normalised by the effective radius of the stellar disc, the slopes show no clear evolution for z< 1, with a median value of approximately-0.23 dex reff -1. As a function of stellar mass, we find that metallicity gradients steepen for stellar masses smaller than ~1010.3M· while the trend reverses for higher stellar masses, in the redshift range z = [0,1]. Galaxies with small stellar masses have discs with larger reff and flatter metallicity gradients than expected. We detect migration albeit weaker than in previous works. Conclusions. Our stellar discs show a mild evolution of the stellar metallicity slopes up to z ~ 1, which is well-matched by the evolution calculated archeologically from the abundance distributions of mono-age stellar populations at z ~ 0. The dispersion in the relations allows for stronger individual evolutions. Overall, supernova feedback could explain the trends but an impact of migration can not be totally discarded. Galaxy-galaxy interactions or small satellite accretions can also contribute to modify the metallicity profiles in the outer parts. Disentangling the effects of these processes for individual galaxies is still a challenge in a cosmological context. © 2017 ESO.This work was partially supported by PICT 2011-0959 and PIP 2012-0396 (Mincyt, Argentina). P.B.T. acknowledges partial support from the Nucleo UNAB 2015 DI-677 of Universidad Andres Bello and Fondecyt 1150334 and the Southern Astrophysics Network (SAN) collaboration funded by Conicyt. R.E.G.M. acknowledges support from Ciencia sem Fronteiras (CNPq, Brazil). P.S.B. acknowledges financial support from the: CONICYT-Chile Basal-CATA PFB-06/2007 and the AYA2013-48226-C3-1-P by the Ministerio de Ciencia e Innovacion. J.M.V. acknowledges financial support from AYA2013-47742-C4-1-P by the Spanish MINECO.Peer ReviewedEDP SciencesComisión Nacional de Investigación Científica y Tecnológica (Chile)Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil)Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina)Fondo para la Investigación Científica y Tecnológica (Argentina)Ministerio de Ciencia, Tecnología e Innovación Productiva (Argentina)Ministerio de Ciencia e Innovación (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2018201820172018info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/167385reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2013-47742-C4-1-PSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1673852026-05-22T06:33:51Z
dc.title.none.fl_str_mv Mild evolution of the stellar metallicity gradients of disc galaxies
title Mild evolution of the stellar metallicity gradients of disc galaxies
spellingShingle Mild evolution of the stellar metallicity gradients of disc galaxies
Tissera, P.B
Galaxies: ISM
Galaxies: evolution
Galaxies: formation
Galaxies: abundances
title_short Mild evolution of the stellar metallicity gradients of disc galaxies
title_full Mild evolution of the stellar metallicity gradients of disc galaxies
title_fullStr Mild evolution of the stellar metallicity gradients of disc galaxies
title_full_unstemmed Mild evolution of the stellar metallicity gradients of disc galaxies
title_sort Mild evolution of the stellar metallicity gradients of disc galaxies
dc.creator.none.fl_str_mv Tissera, P.B
MacHado, R.E.G
Vílchez Medina, José Manuel
Pedrosa, S.E
Sanchez-Blazquez, P
Varela, S.
author Tissera, P.B
author_facet Tissera, P.B
MacHado, R.E.G
Vílchez Medina, José Manuel
Pedrosa, S.E
Sanchez-Blazquez, P
Varela, S.
author_role author
author2 MacHado, R.E.G
Vílchez Medina, José Manuel
Pedrosa, S.E
Sanchez-Blazquez, P
Varela, S.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Comisión Nacional de Investigación Científica y Tecnológica (Chile)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil)
Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina)
Fondo para la Investigación Científica y Tecnológica (Argentina)
Ministerio de Ciencia, Tecnología e Innovación Productiva (Argentina)
Ministerio de Ciencia e Innovación (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Galaxies: ISM
Galaxies: evolution
Galaxies: formation
Galaxies: abundances
topic Galaxies: ISM
Galaxies: evolution
Galaxies: formation
Galaxies: abundances
description The metallicity gradients of the stellar populations in disc galaxies and their evolution store relevant information on the disc formation history and on those processes which could mix stars a posteriori, such as migration, bars and/or galaxy-galaxy interactions. Aims. We aim to investigate the evolution of the metallicity gradients of the whole stellar populations in disc components of simulated galaxies in a cosmological context. Methods. We analyse simulated disc galaxies selected from a cosmological hydrodynamical simulation that includes chemical evolution and a physically motivated supernova feedback capable of driving mass-loaded galactic winds. Results. We detect a mild evolution with redshift in the metallicity slopes of-0.02 ± 0.01 dex kpc-1 from z ~ 1. If the metallicity profiles are normalised by the effective radius of the stellar disc, the slopes show no clear evolution for z< 1, with a median value of approximately-0.23 dex reff -1. As a function of stellar mass, we find that metallicity gradients steepen for stellar masses smaller than ~1010.3M· while the trend reverses for higher stellar masses, in the redshift range z = [0,1]. Galaxies with small stellar masses have discs with larger reff and flatter metallicity gradients than expected. We detect migration albeit weaker than in previous works. Conclusions. Our stellar discs show a mild evolution of the stellar metallicity slopes up to z ~ 1, which is well-matched by the evolution calculated archeologically from the abundance distributions of mono-age stellar populations at z ~ 0. The dispersion in the relations allows for stronger individual evolutions. Overall, supernova feedback could explain the trends but an impact of migration can not be totally discarded. Galaxy-galaxy interactions or small satellite accretions can also contribute to modify the metallicity profiles in the outer parts. Disentangling the effects of these processes for individual galaxies is still a challenge in a cosmological context. © 2017 ESO.
publishDate 2017
dc.date.none.fl_str_mv 2017
2018
2018
2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/167385
url http://hdl.handle.net/10261/167385
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2013-47742-C4-1-P
Sí
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)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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