Shape and kinematics of elliptical galaxies: evolution due to merging at z < 1.5

[EN]Aims. We investigate the evolution in the shape and kinematics of elliptical galaxies in a cosmological framework. Methods. We identified relaxed, elliptical-like objects (ELOs) at redshifts z = 0, z = 0.5, z = 1 and z = 1.5 within a set of hydrodynamic, self-consistent simulations completed for...

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Detalles Bibliográficos
Autores: González-García, A. César, Oñorbe, J., Domínguez-Tenreiro, R., Gómez-Flechoso, M. A.
Tipo de recurso: artículo
Fecha de publicación:2009
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/75153
Acceso en línea:http://hdl.handle.net/10261/75153
Access Level:acceso abierto
Palabra clave:Galaxies: elliptical and lenticular, cD
Galaxies: fundamental parameters
Galaxies: interactions
Galaxies: evolution
Galaxies: formation
Galaxy: kinematics and dynamics
Incipit
Instituto de Ciencias del Patrimonio
Institute of Heritage Sciences
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repository_id_str
spelling Shape and kinematics of elliptical galaxies: evolution due to merging at z < 1.5González-García, A. CésarOñorbe, J.Domínguez-Tenreiro, R.Gómez-Flechoso, M. A.Galaxies: elliptical and lenticular, cDGalaxies: fundamental parametersGalaxies: interactionsGalaxies: evolutionGalaxies: formationGalaxy: kinematics and dynamicsIncipitInstituto de Ciencias del PatrimonioInstitute of Heritage Sciences[EN]Aims. We investigate the evolution in the shape and kinematics of elliptical galaxies in a cosmological framework. Methods. We identified relaxed, elliptical-like objects (ELOs) at redshifts z = 0, z = 0.5, z = 1 and z = 1.5 within a set of hydrodynamic, self-consistent simulations completed for a concordance cosmological model. Results. The population of elliptical systems that we analysed evolve systematically with time becoming rounder in general by z = 0 and also more velocity dispersion supported. We found that this is due primarily to major dry mergers where only a modest amount of angular momentum is involved in the merger event. Despite the general trend, in a significant number of cases the merger event involves a relatively high amount of specific angular momentum, which causes the system in general to acquire higher rotational support and/or a more oblate shape. These evolutionary patterns persist when we study our systems in projection, in simulating true observations, and thus should be evident in future observations.Peer reviewedEDP Sciences201320132009info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/75153reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1051/0004-6361/200811452info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/751532026-05-22T06:33:51Z
dc.title.none.fl_str_mv Shape and kinematics of elliptical galaxies: evolution due to merging at z < 1.5
title Shape and kinematics of elliptical galaxies: evolution due to merging at z < 1.5
spellingShingle Shape and kinematics of elliptical galaxies: evolution due to merging at z < 1.5
González-García, A. César
Galaxies: elliptical and lenticular, cD
Galaxies: fundamental parameters
Galaxies: interactions
Galaxies: evolution
Galaxies: formation
Galaxy: kinematics and dynamics
Incipit
Instituto de Ciencias del Patrimonio
Institute of Heritage Sciences
title_short Shape and kinematics of elliptical galaxies: evolution due to merging at z < 1.5
title_full Shape and kinematics of elliptical galaxies: evolution due to merging at z < 1.5
title_fullStr Shape and kinematics of elliptical galaxies: evolution due to merging at z < 1.5
title_full_unstemmed Shape and kinematics of elliptical galaxies: evolution due to merging at z < 1.5
title_sort Shape and kinematics of elliptical galaxies: evolution due to merging at z < 1.5
dc.creator.none.fl_str_mv González-García, A. César
Oñorbe, J.
Domínguez-Tenreiro, R.
Gómez-Flechoso, M. A.
author González-García, A. César
author_facet González-García, A. César
Oñorbe, J.
Domínguez-Tenreiro, R.
Gómez-Flechoso, M. A.
author_role author
author2 Oñorbe, J.
Domínguez-Tenreiro, R.
Gómez-Flechoso, M. A.
author2_role author
author
author
dc.subject.none.fl_str_mv Galaxies: elliptical and lenticular, cD
Galaxies: fundamental parameters
Galaxies: interactions
Galaxies: evolution
Galaxies: formation
Galaxy: kinematics and dynamics
Incipit
Instituto de Ciencias del Patrimonio
Institute of Heritage Sciences
topic Galaxies: elliptical and lenticular, cD
Galaxies: fundamental parameters
Galaxies: interactions
Galaxies: evolution
Galaxies: formation
Galaxy: kinematics and dynamics
Incipit
Instituto de Ciencias del Patrimonio
Institute of Heritage Sciences
description [EN]Aims. We investigate the evolution in the shape and kinematics of elliptical galaxies in a cosmological framework. Methods. We identified relaxed, elliptical-like objects (ELOs) at redshifts z = 0, z = 0.5, z = 1 and z = 1.5 within a set of hydrodynamic, self-consistent simulations completed for a concordance cosmological model. Results. The population of elliptical systems that we analysed evolve systematically with time becoming rounder in general by z = 0 and also more velocity dispersion supported. We found that this is due primarily to major dry mergers where only a modest amount of angular momentum is involved in the merger event. Despite the general trend, in a significant number of cases the merger event involves a relatively high amount of specific angular momentum, which causes the system in general to acquire higher rotational support and/or a more oblate shape. These evolutionary patterns persist when we study our systems in projection, in simulating true observations, and thus should be evident in future observations.
publishDate 2009
dc.date.none.fl_str_mv 2009
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/10261/75153
url http://hdl.handle.net/10261/75153
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1051/0004-6361/200811452
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 15,812429

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