VLT photometry in the Antlia cluster: the giant ellipticals NGC 3258 and NGC 3268 and their globular cluster systems

Autores
Bassino, Lilia Patricia; Richtler, Tom; Dirsch, Boris
Año de publicación
2008
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present a deep Very Large Telescope (VLT) photometry in the regions surrounding the two dominant galaxies of the Antlia cluster, the giant ellipticals NGC 3258 and NGC 3268. We construct the luminosity functions of their globular cluster systems (GCSs) and determine their distances through the turn-over magnitudes. These distances are in good agreement with those obtained by the SBF method. There is some, but not conclusive, evidence that the distance to NGC 3268 is larger by several Mpc. The GCSs colour distributions are bimodal but the brightest globular clusters (GCs) show a unimodal distribution with an intermediate colour peak. The radial distributions of both GCSs are well fitted by de Vaucouleurs laws up to 5 arcmin. Red GCs present a steeper radial density profile than the blue GCs, and follow closely the galaxies' brightness profiles. Total GC populations are estimated to be about 6000 ± 150 GCs in NGC 3258 and NGC 4750 ± 150 GCs in NGC 3268. We discuss the possible existence of GCs in a field located between the two giant galaxies (intracluster GCs). Their luminosity functions and number densities are consistent with the two GCSs overlapping in projection.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Astrofísica de La Plata
Materia
Ciencias Astronómicas
Galaxies: clusters: general
Galaxies: elliptical and lenticular, cD
Galaxies: individual: NGC 3258
Galaxies: individual: NGC 3268
Galaxies: photometry
Galaxies: star clusters
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/84167
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/84167
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling VLT photometry in the Antlia cluster: the giant ellipticals NGC 3258 and NGC 3268 and their globular cluster systemsBassino, Lilia PatriciaRichtler, TomDirsch, BorisCiencias AstronómicasGalaxies: clusters: generalGalaxies: elliptical and lenticular, cDGalaxies: individual: NGC 3258Galaxies: individual: NGC 3268Galaxies: photometryGalaxies: star clustersWe present a deep Very Large Telescope (VLT) photometry in the regions surrounding the two dominant galaxies of the Antlia cluster, the giant ellipticals NGC 3258 and NGC 3268. We construct the luminosity functions of their globular cluster systems (GCSs) and determine their distances through the turn-over magnitudes. These distances are in good agreement with those obtained by the SBF method. There is some, but not conclusive, evidence that the distance to NGC 3268 is larger by several Mpc. The GCSs colour distributions are bimodal but the brightest globular clusters (GCs) show a unimodal distribution with an intermediate colour peak. The radial distributions of both GCSs are well fitted by de Vaucouleurs laws up to 5 arcmin. Red GCs present a steeper radial density profile than the blue GCs, and follow closely the galaxies' brightness profiles. Total GC populations are estimated to be about 6000 ± 150 GCs in NGC 3258 and NGC 4750 ± 150 GCs in NGC 3268. We discuss the possible existence of GCs in a field located between the two giant galaxies (intracluster GCs). Their luminosity functions and number densities are consistent with the two GCSs overlapping in projection.Facultad de Ciencias Astronómicas y GeofísicasInstituto de Astrofísica de La Plata2008info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1145-1156http://sedici.unlp.edu.ar/handle/10915/84167enginfo:eu-repo/semantics/altIdentifier/issn/0035-8711info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2966.2008.13115.xinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:16:11Zoai:sedici.unlp.edu.ar:10915/84167Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:16:11.483SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv VLT photometry in the Antlia cluster: the giant ellipticals NGC 3258 and NGC 3268 and their globular cluster systems
title VLT photometry in the Antlia cluster: the giant ellipticals NGC 3258 and NGC 3268 and their globular cluster systems
spellingShingle VLT photometry in the Antlia cluster: the giant ellipticals NGC 3258 and NGC 3268 and their globular cluster systems
Bassino, Lilia Patricia
Ciencias Astronómicas
Galaxies: clusters: general
Galaxies: elliptical and lenticular, cD
Galaxies: individual: NGC 3258
Galaxies: individual: NGC 3268
Galaxies: photometry
Galaxies: star clusters
title_short VLT photometry in the Antlia cluster: the giant ellipticals NGC 3258 and NGC 3268 and their globular cluster systems
title_full VLT photometry in the Antlia cluster: the giant ellipticals NGC 3258 and NGC 3268 and their globular cluster systems
title_fullStr VLT photometry in the Antlia cluster: the giant ellipticals NGC 3258 and NGC 3268 and their globular cluster systems
title_full_unstemmed VLT photometry in the Antlia cluster: the giant ellipticals NGC 3258 and NGC 3268 and their globular cluster systems
title_sort VLT photometry in the Antlia cluster: the giant ellipticals NGC 3258 and NGC 3268 and their globular cluster systems
dc.creator.none.fl_str_mv Bassino, Lilia Patricia
Richtler, Tom
Dirsch, Boris
author Bassino, Lilia Patricia
author_facet Bassino, Lilia Patricia
Richtler, Tom
Dirsch, Boris
author_role author
author2 Richtler, Tom
Dirsch, Boris
author2_role author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
Galaxies: clusters: general
Galaxies: elliptical and lenticular, cD
Galaxies: individual: NGC 3258
Galaxies: individual: NGC 3268
Galaxies: photometry
Galaxies: star clusters
topic Ciencias Astronómicas
Galaxies: clusters: general
Galaxies: elliptical and lenticular, cD
Galaxies: individual: NGC 3258
Galaxies: individual: NGC 3268
Galaxies: photometry
Galaxies: star clusters
dc.description.none.fl_txt_mv We present a deep Very Large Telescope (VLT) photometry in the regions surrounding the two dominant galaxies of the Antlia cluster, the giant ellipticals NGC 3258 and NGC 3268. We construct the luminosity functions of their globular cluster systems (GCSs) and determine their distances through the turn-over magnitudes. These distances are in good agreement with those obtained by the SBF method. There is some, but not conclusive, evidence that the distance to NGC 3268 is larger by several Mpc. The GCSs colour distributions are bimodal but the brightest globular clusters (GCs) show a unimodal distribution with an intermediate colour peak. The radial distributions of both GCSs are well fitted by de Vaucouleurs laws up to 5 arcmin. Red GCs present a steeper radial density profile than the blue GCs, and follow closely the galaxies' brightness profiles. Total GC populations are estimated to be about 6000 ± 150 GCs in NGC 3258 and NGC 4750 ± 150 GCs in NGC 3268. We discuss the possible existence of GCs in a field located between the two giant galaxies (intracluster GCs). Their luminosity functions and number densities are consistent with the two GCSs overlapping in projection.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Astrofísica de La Plata
description We present a deep Very Large Telescope (VLT) photometry in the regions surrounding the two dominant galaxies of the Antlia cluster, the giant ellipticals NGC 3258 and NGC 3268. We construct the luminosity functions of their globular cluster systems (GCSs) and determine their distances through the turn-over magnitudes. These distances are in good agreement with those obtained by the SBF method. There is some, but not conclusive, evidence that the distance to NGC 3268 is larger by several Mpc. The GCSs colour distributions are bimodal but the brightest globular clusters (GCs) show a unimodal distribution with an intermediate colour peak. The radial distributions of both GCSs are well fitted by de Vaucouleurs laws up to 5 arcmin. Red GCs present a steeper radial density profile than the blue GCs, and follow closely the galaxies' brightness profiles. Total GC populations are estimated to be about 6000 ± 150 GCs in NGC 3258 and NGC 4750 ± 150 GCs in NGC 3268. We discuss the possible existence of GCs in a field located between the two giant galaxies (intracluster GCs). Their luminosity functions and number densities are consistent with the two GCSs overlapping in projection.
publishDate 2008
dc.date.none.fl_str_mv 2008
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/84167
url http://sedici.unlp.edu.ar/handle/10915/84167
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0035-8711
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2966.2008.13115.x
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
1145-1156
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 13.070432

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