Evolution induced by dry minor mergers onto fast-rotator S0 galaxies

Tapia, Trinidad et al.

Detalles Bibliográficos
Autores: Tapia, Trinidad, González-García, A. César, Borlaff, Alejandro S.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2014
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/136921
Acceso en línea:http://hdl.handle.net/10261/136921
Access Level:acceso abierto
Palabra clave:Galaxies: bulges
Galaxies: evolution
Galaxies: elliptical and lenticular
cD
Galaxies: kinematics and dynamics
Galaxies: structure
Galaxies: interactions
id ES_68addb71e7d2d198e352bbb95bedf0a9
oai_identifier_str oai:digital.csic.es:10261/136921
network_acronym_str ES
network_name_str España
repository_id_str
dc.title.none.fl_str_mv Evolution induced by dry minor mergers onto fast-rotator S0 galaxies
title Evolution induced by dry minor mergers onto fast-rotator S0 galaxies
spellingShingle Evolution induced by dry minor mergers onto fast-rotator S0 galaxies
Tapia, Trinidad
Galaxies: bulges
Galaxies: evolution
Galaxies: elliptical and lenticular
cD
Galaxies: kinematics and dynamics
Galaxies: structure
Galaxies: interactions
title_short Evolution induced by dry minor mergers onto fast-rotator S0 galaxies
title_full Evolution induced by dry minor mergers onto fast-rotator S0 galaxies
title_fullStr Evolution induced by dry minor mergers onto fast-rotator S0 galaxies
title_full_unstemmed Evolution induced by dry minor mergers onto fast-rotator S0 galaxies
title_sort Evolution induced by dry minor mergers onto fast-rotator S0 galaxies
dc.creator.none.fl_str_mv Tapia, Trinidad
González-García, A. César
Borlaff, Alejandro S.
author Tapia, Trinidad
author_facet Tapia, Trinidad
González-García, A. César
Borlaff, Alejandro S.
author_role author
author2 González-García, A. César
Borlaff, Alejandro S.
author2_role author
author
dc.contributor.none.fl_str_mv Comunidad de Madrid
Ministerio de Ciencia e Innovación (España)
Campus de Excelencia Internacional Moncloa
Ministerio de Economía y Competitividad (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Galaxies: bulges
Galaxies: evolution
Galaxies: elliptical and lenticular
cD
Galaxies: kinematics and dynamics
Galaxies: structure
Galaxies: interactions
topic Galaxies: bulges
Galaxies: evolution
Galaxies: elliptical and lenticular
cD
Galaxies: kinematics and dynamics
Galaxies: structure
Galaxies: interactions
description Tapia, Trinidad et al.
publishDate 2014
dc.date.none.fl_str_mv 2014
2016
2016
2016
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/10261/136921
url http://hdl.handle.net/10261/136921
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
S2009/ESP-1496/AstroMadrid
http://dx.doi.org/10.1051/0004-6361/201321386
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
_version_ 1869409977112723456
spelling Evolution induced by dry minor mergers onto fast-rotator S0 galaxiesTapia, TrinidadGonzález-García, A. CésarBorlaff, Alejandro S.Galaxies: bulgesGalaxies: evolutionGalaxies: elliptical and lenticularcDGalaxies: kinematics and dynamicsGalaxies: structureGalaxies: interactionsTapia, Trinidad et al.[Context] Numerical studies have shown that the properties of the S0 galaxies with kinematics intermediate between fast and slow rotators are difficult to explain by a scenario of major mergers.[Aims] We investigate whether the smoother perturbation induced by minor mergers can reproduce these systems.[Methods] We analysed collisionless N-body simulations of intermediate and minor dry mergers onto S0s to determine the structural and kinematic evolution induced by the encounters. The original primary galaxies represent gas-poor fast-rotator S0b and S0c galaxies with high intrinsic ellipticities. The original bulges are intrinsically spherical and have low rotation. Different mass ratios, parent bulges, density ratios, and orbits were studied.[Results] Minor mergers induce a lower decrease of the global rotational support (as provided by λe) than encounters of lower mass ratios, which results in S0s with properties intermediate between fast and slow rotators. The resulting remnants are intrinsically more triaxial, less flattened, and span the whole range of apparent ellipticities up to εe ∼ 0.8. They do not show lower apparent ellipticities in random projections than initially; on the contrary, the formation of oval distortions and the disc thickening increase the percentage of projections at 0.4 < εe < 0.7. In the experiments with S0b progenitor galaxies, minor mergers tend to spin up the bulge and to slightly decrease its intrinsic ellipticity, whereas in the cases of primary S0c galaxies they keep the rotational support of the bulge nearly constant and significantly decrease its intrinsic ellipticity. The remnant bulges remain nearly spherical (B/A ∼ C/A > 0.9), but exhibit a wide range of triaxialities (0.20 < T < 1.00). In the plane of global anisotropy of velocities (δ) vs.? intrinsic ellipticity (εe,intr), some of our models extend the linear trend found in previous major merger simulations towards higher ε e,intr values, while others clearly depart from it (depending on the progenitor S0). This is consistent with the wide dispersion exhibited by real S0s in this diagram compared with ellipticals, which follow the linear trend drawn by major merger simulations.[Conclusions] The smoother changes induced by minor mergers can explain the existence of S0s with intermediate kinematic properties between fast and slow rotators that are difficult to explain with major mergers. The different trends exhibited by ellipticals and S0 galaxies in the δ - εe diagram may be pointing to the different role played by major mergers in the build-up of each morphological type. © ESO 2014.Supported by the Spanish Ministry of Economy and Competitiveness (MINECO) under projects AYA2006-12955, AYA2009-10368, AYA2009-11137, AYA2012- 30717, AYA2010-21322-C03-02, AYA2010-21887-C04-04, and by the Madrid Regional Government through the AstroMadrid Project (CAM S2009/ESP-1496, http://www.laeff.cab.inta-csic.es/projects/astromadrid/main/index.php). Funded by the Spanish MICINN under the Consolider-Ingenio 2010 Program grant CSD2006- 0070: “First Science with the GTC” (http://www.iac.es/consolider-ingenio-gtc/), and by the Spanish programme of International Campus of Excellence Moncloa (CEI). A.C.G.G. is a Ramón y Cajal Fellow of the Spanish MINECO.Peer ReviewedEDP SciencesComunidad de MadridMinisterio de Ciencia e Innovación (España)Campus de Excelencia Internacional MoncloaMinisterio de Economía y Competitividad (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2016201620142016info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/136921reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#S2009/ESP-1496/AstroMadridhttp://dx.doi.org/10.1051/0004-6361/201321386Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1369212026-05-22T06:33:51Z
score 15,811543

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