Effects of superstructure environment on galaxy groups

Autores
Luparello, Heliana E.; Lares, Marcelo; Yaryura, Yamila; Paz, Dante; Padilla, N.; Garcí­a Lambas, Diego
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We analyse properties of galaxy groups and their dependence on the large-scale environment as defined by superstructures. We find that group–galaxy cross–correlations depend only on group properties regardless the groups reside in superstructures. This indicates that the total galaxy density profile around groups is independent of the global environment. At a given global luminosity, a proxy to group total mass, groups have a larger stellar mass content by a factor 1.3, a relative excess independent of the group luminosity. Groups in superstructures have 40 per cent higher velocity dispersions and systematically larger minimal enclosing radii. We also find that the stellar population of galaxies in groups in superstructures is systematically older as infered from the galaxy spectra Dn 4000 parameter. Although the galaxy number density profile of groups is independent of environment, the star–formation rate and stellar mass profile of the groups residing in superstructures differs from groups elsewhere. For groups residing in superstructures, the combination of a larger stellar mass content and star–formation rate produces a larger time–scale for star formation regardless the distance to the group center. Our results provide evidence that groups in superstructures formed earlier than elsewhere, as expected in the assembly bias scenario.
publishedVersion
Materia
Estructura en gran escala
Estadística
Análisis de datos
Large scale structure of the universe
Statistics
Data analysis
Nivel de accesibilidad
acceso abierto
Condiciones de uso
Repositorio
Repositorio Digital Universitario (UNC)
Institución
Universidad Nacional de Córdoba
OAI Identificador
oai:rdu.unc.edu.ar:11086/1655

id RDUUNC_cf615f4774935aad0d7c3140bf6b90f3
oai_identifier_str oai:rdu.unc.edu.ar:11086/1655
network_acronym_str RDUUNC
repository_id_str 2572
network_name_str Repositorio Digital Universitario (UNC)
spelling Effects of superstructure environment on galaxy groupsLuparello, Heliana E.Lares, MarceloYaryura, YamilaPaz, DantePadilla, N.Garcí­a Lambas, DiegoEstructura en gran escalaEstadísticaAnálisis de datosLarge scale structure of the universeStatisticsData analysisWe analyse properties of galaxy groups and their dependence on the large-scale environment as defined by superstructures. We find that group–galaxy cross–correlations depend only on group properties regardless the groups reside in superstructures. This indicates that the total galaxy density profile around groups is independent of the global environment. At a given global luminosity, a proxy to group total mass, groups have a larger stellar mass content by a factor 1.3, a relative excess independent of the group luminosity. Groups in superstructures have 40 per cent higher velocity dispersions and systematically larger minimal enclosing radii. We also find that the stellar population of galaxies in groups in superstructures is systematically older as infered from the galaxy spectra Dn 4000 parameter. Although the galaxy number density profile of groups is independent of environment, the star–formation rate and stellar mass profile of the groups residing in superstructures differs from groups elsewhere. For groups residing in superstructures, the combination of a larger stellar mass content and star–formation rate produces a larger time–scale for star formation regardless the distance to the group center. Our results provide evidence that groups in superstructures formed earlier than elsewhere, as expected in the assembly bias scenario.publishedVersionOxford University Press2013-06-21info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfMonthly Notices of the Royal Astronomical Society (June 21, 2013) 432 (2): 1367-1374http://dx.doi.org/10.1093/mnras/stt556http://hdl.handle.net/11086/1655enginfo:eu-repo/semantics/openAccessreponame:Repositorio Digital Universitario (UNC)instname:Universidad Nacional de Córdobainstacron:UNC2025-09-29T13:42:40Zoai:rdu.unc.edu.ar:11086/1655Institucionalhttps://rdu.unc.edu.ar/Universidad públicaNo correspondehttp://rdu.unc.edu.ar/oai/snrdoca.unc@gmail.comArgentinaNo correspondeNo correspondeNo correspondeopendoar:25722025-09-29 13:42:41.274Repositorio Digital Universitario (UNC) - Universidad Nacional de Córdobafalse
dc.title.none.fl_str_mv Effects of superstructure environment on galaxy groups
title Effects of superstructure environment on galaxy groups
spellingShingle Effects of superstructure environment on galaxy groups
Luparello, Heliana E.
Estructura en gran escala
Estadística
Análisis de datos
Large scale structure of the universe
Statistics
Data analysis
title_short Effects of superstructure environment on galaxy groups
title_full Effects of superstructure environment on galaxy groups
title_fullStr Effects of superstructure environment on galaxy groups
title_full_unstemmed Effects of superstructure environment on galaxy groups
title_sort Effects of superstructure environment on galaxy groups
dc.creator.none.fl_str_mv Luparello, Heliana E.
Lares, Marcelo
Yaryura, Yamila
Paz, Dante
Padilla, N.
Garcí­a Lambas, Diego
author Luparello, Heliana E.
author_facet Luparello, Heliana E.
Lares, Marcelo
Yaryura, Yamila
Paz, Dante
Padilla, N.
Garcí­a Lambas, Diego
author_role author
author2 Lares, Marcelo
Yaryura, Yamila
Paz, Dante
Padilla, N.
Garcí­a Lambas, Diego
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Estructura en gran escala
Estadística
Análisis de datos
Large scale structure of the universe
Statistics
Data analysis
topic Estructura en gran escala
Estadística
Análisis de datos
Large scale structure of the universe
Statistics
Data analysis
dc.description.none.fl_txt_mv We analyse properties of galaxy groups and their dependence on the large-scale environment as defined by superstructures. We find that group–galaxy cross–correlations depend only on group properties regardless the groups reside in superstructures. This indicates that the total galaxy density profile around groups is independent of the global environment. At a given global luminosity, a proxy to group total mass, groups have a larger stellar mass content by a factor 1.3, a relative excess independent of the group luminosity. Groups in superstructures have 40 per cent higher velocity dispersions and systematically larger minimal enclosing radii. We also find that the stellar population of galaxies in groups in superstructures is systematically older as infered from the galaxy spectra Dn 4000 parameter. Although the galaxy number density profile of groups is independent of environment, the star–formation rate and stellar mass profile of the groups residing in superstructures differs from groups elsewhere. For groups residing in superstructures, the combination of a larger stellar mass content and star–formation rate produces a larger time–scale for star formation regardless the distance to the group center. Our results provide evidence that groups in superstructures formed earlier than elsewhere, as expected in the assembly bias scenario.
publishedVersion
description We analyse properties of galaxy groups and their dependence on the large-scale environment as defined by superstructures. We find that group–galaxy cross–correlations depend only on group properties regardless the groups reside in superstructures. This indicates that the total galaxy density profile around groups is independent of the global environment. At a given global luminosity, a proxy to group total mass, groups have a larger stellar mass content by a factor 1.3, a relative excess independent of the group luminosity. Groups in superstructures have 40 per cent higher velocity dispersions and systematically larger minimal enclosing radii. We also find that the stellar population of galaxies in groups in superstructures is systematically older as infered from the galaxy spectra Dn 4000 parameter. Although the galaxy number density profile of groups is independent of environment, the star–formation rate and stellar mass profile of the groups residing in superstructures differs from groups elsewhere. For groups residing in superstructures, the combination of a larger stellar mass content and star–formation rate produces a larger time–scale for star formation regardless the distance to the group center. Our results provide evidence that groups in superstructures formed earlier than elsewhere, as expected in the assembly bias scenario.
publishDate 2013
dc.date.none.fl_str_mv 2013-06-21
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv Monthly Notices of the Royal Astronomical Society (June 21, 2013) 432 (2): 1367-1374
http://dx.doi.org/10.1093/mnras/stt556
http://hdl.handle.net/11086/1655
identifier_str_mv Monthly Notices of the Royal Astronomical Society (June 21, 2013) 432 (2): 1367-1374
url http://dx.doi.org/10.1093/mnras/stt556
http://hdl.handle.net/11086/1655
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Oxford University Press
publisher.none.fl_str_mv Oxford University Press
dc.source.none.fl_str_mv reponame:Repositorio Digital Universitario (UNC)
instname:Universidad Nacional de Córdoba
instacron:UNC
reponame_str Repositorio Digital Universitario (UNC)
collection Repositorio Digital Universitario (UNC)
instname_str Universidad Nacional de Córdoba
instacron_str UNC
institution UNC
repository.name.fl_str_mv Repositorio Digital Universitario (UNC) - Universidad Nacional de Córdoba
repository.mail.fl_str_mv oca.unc@gmail.com
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