Formation of kinematic subsystems in stellar spiral-spiral mergers

[EN]We show that kinematically peculiar cores may be generated in stellar spiral-spiral mergers. Kinematic segregation appears as the central bulges transport orbital angular momentum inward to the center of the remnant, while the outer parts keep the spin signature of the precursor disks. The pecul...

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Detalhes bibliográficos
Autores: Balcells, Marc, González-García, A. César
Tipo de documento: artigo
Data de publicação:1998
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/74996
Acesso em linha:http://hdl.handle.net/10261/74996
Access Level:Acceso aberto
Palavra-chave:Galaxies: abundances
Galaxies: elliptical and lenticular, cD
Galaxies: interactions
Galaxies: kinematics and dynamics
Galaxies: peculiar
Incipit
Institute of Heritage Sciences
Instituto de Ciencias del Patrimonio
id ES_bf8ca4c6ade008e84d72d700acfee255
oai_identifier_str oai:digital.csic.es:10261/74996
network_acronym_str ES
network_name_str España
repository_id_str
spelling Formation of kinematic subsystems in stellar spiral-spiral mergersBalcells, MarcGonzález-García, A. CésarGalaxies: abundancesGalaxies: elliptical and lenticular, cDGalaxies: interactionsGalaxies: kinematics and dynamicsGalaxies: peculiarIncipitInstitute of Heritage SciencesInstituto de Ciencias del Patrimonio[EN]We show that kinematically peculiar cores may be generated in stellar spiral-spiral mergers. Kinematic segregation appears as the central bulges transport orbital angular momentum inward to the center of the remnant, while the outer parts keep the spin signature of the precursor disks. The peculiar core is composed mostly of bulge material, and its size best matches that of observed peculiar cores for mergers with unequal galaxy masses (~2:1). Population decoupling is predicted by the rapid radial decrease of the bulge fraction in the remnant. In this scenario, a starburst may pump up the remnant metallicity, but otherwise the high metallicity of the kinematically decoupled core is built on the high metal content of the inner bulges rather than on a high selfenrichment of a population built from scratch out of the precursors’ gas. Mergers with galaxy mass ratios 3:1 and above generate disk galaxies with counterrotating bulges.Peer reviewedInstitute of Physics Publishing201320131998info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/74996reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://iopscience.iop.org/1538-4357/505/2/L109info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/749962026-05-22T06:33:51Z
dc.title.none.fl_str_mv Formation of kinematic subsystems in stellar spiral-spiral mergers
title Formation of kinematic subsystems in stellar spiral-spiral mergers
spellingShingle Formation of kinematic subsystems in stellar spiral-spiral mergers
Balcells, Marc
Galaxies: abundances
Galaxies: elliptical and lenticular, cD
Galaxies: interactions
Galaxies: kinematics and dynamics
Galaxies: peculiar
Incipit
Institute of Heritage Sciences
Instituto de Ciencias del Patrimonio
title_short Formation of kinematic subsystems in stellar spiral-spiral mergers
title_full Formation of kinematic subsystems in stellar spiral-spiral mergers
title_fullStr Formation of kinematic subsystems in stellar spiral-spiral mergers
title_full_unstemmed Formation of kinematic subsystems in stellar spiral-spiral mergers
title_sort Formation of kinematic subsystems in stellar spiral-spiral mergers
dc.creator.none.fl_str_mv Balcells, Marc
González-García, A. César
author Balcells, Marc
author_facet Balcells, Marc
González-García, A. César
author_role author
author2 González-García, A. César
author2_role author
dc.subject.none.fl_str_mv Galaxies: abundances
Galaxies: elliptical and lenticular, cD
Galaxies: interactions
Galaxies: kinematics and dynamics
Galaxies: peculiar
Incipit
Institute of Heritage Sciences
Instituto de Ciencias del Patrimonio
topic Galaxies: abundances
Galaxies: elliptical and lenticular, cD
Galaxies: interactions
Galaxies: kinematics and dynamics
Galaxies: peculiar
Incipit
Institute of Heritage Sciences
Instituto de Ciencias del Patrimonio
description [EN]We show that kinematically peculiar cores may be generated in stellar spiral-spiral mergers. Kinematic segregation appears as the central bulges transport orbital angular momentum inward to the center of the remnant, while the outer parts keep the spin signature of the precursor disks. The peculiar core is composed mostly of bulge material, and its size best matches that of observed peculiar cores for mergers with unequal galaxy masses (~2:1). Population decoupling is predicted by the rapid radial decrease of the bulge fraction in the remnant. In this scenario, a starburst may pump up the remnant metallicity, but otherwise the high metallicity of the kinematically decoupled core is built on the high metal content of the inner bulges rather than on a high selfenrichment of a population built from scratch out of the precursors’ gas. Mergers with galaxy mass ratios 3:1 and above generate disk galaxies with counterrotating bulges.
publishDate 1998
dc.date.none.fl_str_mv 1998
2013
2013
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/74996
url http://hdl.handle.net/10261/74996
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://iopscience.iop.org/1538-4357/505/2/L109
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Institute of Physics Publishing
publisher.none.fl_str_mv Institute of Physics Publishing
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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