Satellites around massive galaxies since z∼ 2

The accretion of minor satellites has been postulated as the most likely mechanism to explain the significant size evolution of massive galaxies over cosmic time. Using a sample of 629 massive (M_star~ 10^11 M_⊙) galaxies from the near-infrared Palomar/DEEP-2 survey, we explore what fraction of thes...

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Detalles Bibliográficos
Autores: Mármol Queraltó, E., Trujillo, I., Pérez González, Pablo Guillermo, Varela, J., Barro, G.
Tipo de recurso: artículo
Fecha de publicación:2012
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/45093
Acceso en línea:https://hdl.handle.net/20.500.14352/45093
Access Level:acceso abierto
Palabra clave:52
Goods nicmos survey
Size evolution
Elliptic galaxies
Velocity dispersion
Spatial-distribution
Spitzer/Irac sources
Pair fraction
Fir analysis
Stellar
Redshifts
Astrofísica
Astronomía (Física)
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oai_identifier_str oai:docta.ucm.es:20.500.14352/45093
network_acronym_str ES
network_name_str España
repository_id_str
spelling Satellites around massive galaxies since z∼ 2Mármol Queraltó, E.Trujillo, I.Pérez González, Pablo GuillermoVarela, J.Barro, G.52Goods nicmos surveySize evolutionElliptic galaxiesVelocity dispersionSpatial-distributionSpitzer/Irac sourcesPair fractionFir analysisStellarRedshiftsAstrofísicaAstronomía (Física)The accretion of minor satellites has been postulated as the most likely mechanism to explain the significant size evolution of massive galaxies over cosmic time. Using a sample of 629 massive (M_star~ 10^11 M_⊙) galaxies from the near-infrared Palomar/DEEP-2 survey, we explore what fraction of these objects have satellites with 0.01 < M_sat/M_central < 1 (1:100) up to z= 1 and what fraction have satellites with 0.1 < M_sat/M_central < 1 (1:10) up to z= 2 within a projected radial distance of 100 kpc. We find that the fraction of massive galaxies with satellites, after background correction, remains basically constant and close to 30 per cent for satellites with a mass ratio down to 1:100 up to z= 1, and close to 15 per cent for satellites with a 1:10 mass ratio up to z= 2. The family of spheroid-like massive galaxies presents a 2–3 times larger fraction of objects with satellites than the group of disc-like massive galaxies. A crude estimation of the number of 1:3 mergers a massive spheroid-like galaxy has experienced since z~2 is around 2. For a disc-like galaxy this number decreases to ~1.WileyUniversidad Complutense de Madrid20122012-05-0120122012-05-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/45093reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/450932026-06-02T12:44:21Z
dc.title.none.fl_str_mv Satellites around massive galaxies since z∼ 2
title Satellites around massive galaxies since z∼ 2
spellingShingle Satellites around massive galaxies since z∼ 2
Mármol Queraltó, E.
52
Goods nicmos survey
Size evolution
Elliptic galaxies
Velocity dispersion
Spatial-distribution
Spitzer/Irac sources
Pair fraction
Fir analysis
Stellar
Redshifts
Astrofísica
Astronomía (Física)
title_short Satellites around massive galaxies since z∼ 2
title_full Satellites around massive galaxies since z∼ 2
title_fullStr Satellites around massive galaxies since z∼ 2
title_full_unstemmed Satellites around massive galaxies since z∼ 2
title_sort Satellites around massive galaxies since z∼ 2
dc.creator.none.fl_str_mv Mármol Queraltó, E.
Trujillo, I.
Pérez González, Pablo Guillermo
Varela, J.
Barro, G.
author Mármol Queraltó, E.
author_facet Mármol Queraltó, E.
Trujillo, I.
Pérez González, Pablo Guillermo
Varela, J.
Barro, G.
author_role author
author2 Trujillo, I.
Pérez González, Pablo Guillermo
Varela, J.
Barro, G.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 52
Goods nicmos survey
Size evolution
Elliptic galaxies
Velocity dispersion
Spatial-distribution
Spitzer/Irac sources
Pair fraction
Fir analysis
Stellar
Redshifts
Astrofísica
Astronomía (Física)
topic 52
Goods nicmos survey
Size evolution
Elliptic galaxies
Velocity dispersion
Spatial-distribution
Spitzer/Irac sources
Pair fraction
Fir analysis
Stellar
Redshifts
Astrofísica
Astronomía (Física)
description The accretion of minor satellites has been postulated as the most likely mechanism to explain the significant size evolution of massive galaxies over cosmic time. Using a sample of 629 massive (M_star~ 10^11 M_⊙) galaxies from the near-infrared Palomar/DEEP-2 survey, we explore what fraction of these objects have satellites with 0.01 < M_sat/M_central < 1 (1:100) up to z= 1 and what fraction have satellites with 0.1 < M_sat/M_central < 1 (1:10) up to z= 2 within a projected radial distance of 100 kpc. We find that the fraction of massive galaxies with satellites, after background correction, remains basically constant and close to 30 per cent for satellites with a mass ratio down to 1:100 up to z= 1, and close to 15 per cent for satellites with a 1:10 mass ratio up to z= 2. The family of spheroid-like massive galaxies presents a 2–3 times larger fraction of objects with satellites than the group of disc-like massive galaxies. A crude estimation of the number of 1:3 mergers a massive spheroid-like galaxy has experienced since z~2 is around 2. For a disc-like galaxy this number decreases to ~1.
publishDate 2012
dc.date.none.fl_str_mv 2012
2012-05-01
2012
2012-05-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/45093
url https://hdl.handle.net/20.500.14352/45093
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Wiley
publisher.none.fl_str_mv Wiley
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869408224960053248
score 15,301603

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