Galaxy interactions in compact groups - II. Abundance and kinematic anomalies in HCG 91c

© 2015 The Authors. Galaxies in Hickson Compact Group 91 (HCG 91) were observed with the WiFeS integral field spectrograph as part of our ongoing campaign targeting the ionized gas physics and kinematics inside star-forming members of compact groups. Here, we report the discovery of HII regions with...

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Detalhes bibliográficos
Autores: Vogt, F.P.A., Dopita, M.A., Borthakur, S., Verdes-Montenegro, Lourdes, Heckman, T. M., Yun, M.S., Chambers, K.C.
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2015
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:dnet:digitalcsic_::a48aecc8f2b3a1fc99eb8f37edc9e648
Acesso em linha:http://hdl.handle.net/10261/174247
Access Level:acceso abierto
Palavra-chave:Galaxies: evolution
Galaxies: ISM
Galaxies: interactions
Galaxies: individual: HCG 91c
H II regions
ISM: abundances
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spelling Galaxy interactions in compact groups - II. Abundance and kinematic anomalies in HCG 91cVogt, F.P.A.Dopita, M.A.Borthakur, S.Verdes-Montenegro, LourdesHeckman, T. M.Yun, M.S.Chambers, K.C.Galaxies: evolutionGalaxies: ISMGalaxies: interactionsGalaxies: individual: HCG 91cH II regionsISM: abundances© 2015 The Authors. Galaxies in Hickson Compact Group 91 (HCG 91) were observed with the WiFeS integral field spectrograph as part of our ongoing campaign targeting the ionized gas physics and kinematics inside star-forming members of compact groups. Here, we report the discovery of HII regions with abundance and kinematic offsets in the otherwise unremarkable star-forming spiral HCG 91c. The optical emission line analysis of this galaxy reveals that at least three HII regions harbour an oxygen abundance ~0.15 dex lower than expected from their immediate surroundings and from the abundance gradient present in the inner regions of HCG 91c. The same star-forming regions are also associated with a small kinematic offset in the form of a lag of 5-10 km s<sup>-1</sup> with respect to the local circular rotation of the gas. HI observations of HCG 91 from the Very Large Array and broad-band optical images from Pan-STARRS (Panoramic Survey Telescope And Rapid Response System) suggest that HCG 91c is caught early in its interaction with the other members of HCG 91. We discuss different scenarios to explain the origin of the peculiar star-forming regions detected with WiFeS, and show that evidence points towards infalling and collapsing extraplanar gas clouds at the disc-halo interface, possibly as a consequence of long-range gravitational perturbations of HCG91c from the other group members. As such, HCG 91c provides evidence that some of the perturbations possibly associated with the early phase of galaxy evolution in compact groups impact the star-forming disc locally, and on sub-kpc scales.Peer ReviewedOxford University PressConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2019201920152019info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/174247reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésSíinfo:eu-repo/semantics/openAccessoai:dnet:digitalcsic_::a48aecc8f2b3a1fc99eb8f37edc9e6482026-05-22T06:33:51Z
dc.title.none.fl_str_mv Galaxy interactions in compact groups - II. Abundance and kinematic anomalies in HCG 91c
title Galaxy interactions in compact groups - II. Abundance and kinematic anomalies in HCG 91c
spellingShingle Galaxy interactions in compact groups - II. Abundance and kinematic anomalies in HCG 91c
Vogt, F.P.A.
Galaxies: evolution
Galaxies: ISM
Galaxies: interactions
Galaxies: individual: HCG 91c
H II regions
ISM: abundances
title_short Galaxy interactions in compact groups - II. Abundance and kinematic anomalies in HCG 91c
title_full Galaxy interactions in compact groups - II. Abundance and kinematic anomalies in HCG 91c
title_fullStr Galaxy interactions in compact groups - II. Abundance and kinematic anomalies in HCG 91c
title_full_unstemmed Galaxy interactions in compact groups - II. Abundance and kinematic anomalies in HCG 91c
title_sort Galaxy interactions in compact groups - II. Abundance and kinematic anomalies in HCG 91c
dc.creator.none.fl_str_mv Vogt, F.P.A.
Dopita, M.A.
Borthakur, S.
Verdes-Montenegro, Lourdes
Heckman, T. M.
Yun, M.S.
Chambers, K.C.
author Vogt, F.P.A.
author_facet Vogt, F.P.A.
Dopita, M.A.
Borthakur, S.
Verdes-Montenegro, Lourdes
Heckman, T. M.
Yun, M.S.
Chambers, K.C.
author_role author
author2 Dopita, M.A.
Borthakur, S.
Verdes-Montenegro, Lourdes
Heckman, T. M.
Yun, M.S.
Chambers, K.C.
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Galaxies: evolution
Galaxies: ISM
Galaxies: interactions
Galaxies: individual: HCG 91c
H II regions
ISM: abundances
topic Galaxies: evolution
Galaxies: ISM
Galaxies: interactions
Galaxies: individual: HCG 91c
H II regions
ISM: abundances
description © 2015 The Authors. Galaxies in Hickson Compact Group 91 (HCG 91) were observed with the WiFeS integral field spectrograph as part of our ongoing campaign targeting the ionized gas physics and kinematics inside star-forming members of compact groups. Here, we report the discovery of HII regions with abundance and kinematic offsets in the otherwise unremarkable star-forming spiral HCG 91c. The optical emission line analysis of this galaxy reveals that at least three HII regions harbour an oxygen abundance ~0.15 dex lower than expected from their immediate surroundings and from the abundance gradient present in the inner regions of HCG 91c. The same star-forming regions are also associated with a small kinematic offset in the form of a lag of 5-10 km s<sup>-1</sup> with respect to the local circular rotation of the gas. HI observations of HCG 91 from the Very Large Array and broad-band optical images from Pan-STARRS (Panoramic Survey Telescope And Rapid Response System) suggest that HCG 91c is caught early in its interaction with the other members of HCG 91. We discuss different scenarios to explain the origin of the peculiar star-forming regions detected with WiFeS, and show that evidence points towards infalling and collapsing extraplanar gas clouds at the disc-halo interface, possibly as a consequence of long-range gravitational perturbations of HCG91c from the other group members. As such, HCG 91c provides evidence that some of the perturbations possibly associated with the early phase of galaxy evolution in compact groups impact the star-forming disc locally, and on sub-kpc scales.
publishDate 2015
dc.date.none.fl_str_mv 2015
2019
2019
2019
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/10261/174247
url http://hdl.handle.net/10261/174247
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv 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 15,812455

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