Star formation histories in mergers: the spatially resolved properties of the early-stage merger luminous infrared galaxies IC 1623 and NGC 6090

Cortijo Ferrero, Clara et. al.

Detalhes bibliográficos
Autores: Cortijo Ferrero, Clara, González Delgado, Rosa M., Pérez Jiménez, Enrique, García-Benito, Rubén, López-Fernandez, R., Tadhunter, C
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2017
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:dnet:digitalcsic_::7e183c3490e338b217f77e62d83d8329
Acesso em linha:http://hdl.handle.net/10261/148991
Access Level:acceso abierto
Palavra-chave:Techniques: spectroscopic
Galaxies: evolution
Galaxies: interactions
Galaxies:ISM
Galaxies: star formation
Galaxies: stellar content
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spelling Star formation histories in mergers: the spatially resolved properties of the early-stage merger luminous infrared galaxies IC 1623 and NGC 6090Cortijo Ferrero, ClaraGonzález Delgado, Rosa M.Pérez Jiménez, EnriqueGarcía-Benito, RubénLópez-Fernandez, R.Tadhunter, CTechniques: spectroscopicGalaxies: evolutionGalaxies: interactionsGalaxies:ISMGalaxies: star formationGalaxies: stellar contentCortijo Ferrero, Clara et. al.The role of major mergers in galaxy evolution is investigated through a detailed characterization of the stellar populations, ionized gas properties and star formation rates (SFR) in the earlystage merger luminous infrared galaxies (LIRGs) IC 1623 W and NGC 6090, by analysing optical integral field spectroscopy and high-resolution Hubble Space Telescope imaging. The spectra were processed with the STARLIGHT full spectral fitting code, and the emission lines measured in the residual spectra. The results are compared with non-interacting control spiral galaxies from the Calar Alto Legacy Integral Field Area survey. Merger-induced star formation is extended and recent, as revealed by the young ages (50-80 Myr) and high contributions to light of young stellar populations (50-90 per cent), in agreement with merger simulations in the literature. These early-stage mergers have positive central gradients of the stellar metallicity, with an average similar to 0.6 Z(circle dot). Compared to non-interacting spirals, they have lower central nebular metallicity, and flatter profiles, in agreement with the gas inflow scenario. We find that they are dominated by star formation, although shock excitation cannot be discarded in some regions, where high velocity dispersion is found (170-200 km s(-1)). The average SFR in these earlystage mergers (similar to 23-32 M-circle dot yr(-1)) is enhanced with respect to main-sequence Sbc galaxies by factors of 6-9, slightly above the predictions from classical merger simulations, but still possible in about 15 per cent of major galaxy mergers, where U/LIRGs belong.© 2017 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.The authors acknowledge the support from the Spanish Ministerio de Economia y Competitividad, through projects AYA2014-57490- P,AYA201015081, and Junta de Andalucia FQ1580. ALdA, EADL and RCF thank the hospitality of the IAA and the support of Coordenacao de aperfeicoamento de pessoal de nivel superior (CAPES) and Conselho Nacional de Pesquisa (CNPq). RGD acknowledges the support of CNPq (Brazil) through Programa Ciencia sem Fronteiras (401452/2012-3)Peer reviewedOxford University PressMinisterio de Economía y Competitividad (España)Junta de AndalucíaConselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201720172017info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/148991reponame: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/AYA2014-57490-Phttp://dx.doi.org/10.1093/mnras/stx383Síinfo:eu-repo/semantics/openAccessoai:dnet:digitalcsic_::7e183c3490e338b217f77e62d83d83292026-05-22T06:33:51Z
dc.title.none.fl_str_mv Star formation histories in mergers: the spatially resolved properties of the early-stage merger luminous infrared galaxies IC 1623 and NGC 6090
title Star formation histories in mergers: the spatially resolved properties of the early-stage merger luminous infrared galaxies IC 1623 and NGC 6090
spellingShingle Star formation histories in mergers: the spatially resolved properties of the early-stage merger luminous infrared galaxies IC 1623 and NGC 6090
Cortijo Ferrero, Clara
Techniques: spectroscopic
Galaxies: evolution
Galaxies: interactions
Galaxies:ISM
Galaxies: star formation
Galaxies: stellar content
title_short Star formation histories in mergers: the spatially resolved properties of the early-stage merger luminous infrared galaxies IC 1623 and NGC 6090
title_full Star formation histories in mergers: the spatially resolved properties of the early-stage merger luminous infrared galaxies IC 1623 and NGC 6090
title_fullStr Star formation histories in mergers: the spatially resolved properties of the early-stage merger luminous infrared galaxies IC 1623 and NGC 6090
title_full_unstemmed Star formation histories in mergers: the spatially resolved properties of the early-stage merger luminous infrared galaxies IC 1623 and NGC 6090
title_sort Star formation histories in mergers: the spatially resolved properties of the early-stage merger luminous infrared galaxies IC 1623 and NGC 6090
dc.creator.none.fl_str_mv Cortijo Ferrero, Clara
González Delgado, Rosa M.
Pérez Jiménez, Enrique
García-Benito, Rubén
López-Fernandez, R.
Tadhunter, C
author Cortijo Ferrero, Clara
author_facet Cortijo Ferrero, Clara
González Delgado, Rosa M.
Pérez Jiménez, Enrique
García-Benito, Rubén
López-Fernandez, R.
Tadhunter, C
author_role author
author2 González Delgado, Rosa M.
Pérez Jiménez, Enrique
García-Benito, Rubén
López-Fernandez, R.
Tadhunter, C
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Junta de Andalucía
Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Techniques: spectroscopic
Galaxies: evolution
Galaxies: interactions
Galaxies:ISM
Galaxies: star formation
Galaxies: stellar content
topic Techniques: spectroscopic
Galaxies: evolution
Galaxies: interactions
Galaxies:ISM
Galaxies: star formation
Galaxies: stellar content
description Cortijo Ferrero, Clara et. al.
publishDate 2017
dc.date.none.fl_str_mv 2017
2017
2017
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/10261/148991
url http://hdl.handle.net/10261/148991
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/AYA2014-57490-P
http://dx.doi.org/10.1093/mnras/stx383
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Oxford University Press
publisher.none.fl_str_mv Oxford University Press
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 15.812429

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