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

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 tu...

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Detalles Bibliográficos
Autores principales: Bassino, Lilia Patricia, Richtler, Tom, Dirsch, Boris
Formato: Articulo
Lenguaje:Inglés
Publicado: 2008
Materias:
Ciencias Astronómicas
Galaxies: clusters: general
Galaxies: elliptical and lenticular, cD
Galaxies: individual: NGC 3258
Galaxies: individual: NGC 3268
Galaxies: photometry
Galaxies: star clusters
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84167
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84167
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Galaxies: clusters: general
Galaxies: elliptical and lenticular, cD
Galaxies: individual: NGC 3258
Galaxies: individual: NGC 3268
Galaxies: photometry
Galaxies: star clusters
spellingShingle Ciencias Astronómicas
Galaxies: clusters: general
Galaxies: elliptical and lenticular, cD
Galaxies: individual: NGC 3258
Galaxies: individual: NGC 3268
Galaxies: photometry
Galaxies: star clusters
Bassino, Lilia Patricia
Richtler, Tom
Dirsch, Boris
VLT photometry in the Antlia cluster: the giant ellipticals NGC 3258 and NGC 3268 and their globular cluster systems
topic_facet Ciencias Astronómicas
Galaxies: clusters: general
Galaxies: elliptical and lenticular, cD
Galaxies: individual: NGC 3258
Galaxies: individual: NGC 3268
Galaxies: photometry
Galaxies: star clusters
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.
format Articulo
Articulo
author Bassino, Lilia Patricia
Richtler, Tom
Dirsch, Boris
author_facet Bassino, Lilia Patricia
Richtler, Tom
Dirsch, Boris
author_sort Bassino, Lilia Patricia
title VLT photometry in the Antlia cluster: the giant ellipticals NGC 3258 and NGC 3268 and their globular cluster systems
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
publishDate 2008
url http://sedici.unlp.edu.ar/handle/10915/84167
work_keys_str_mv AT bassinoliliapatricia vltphotometryintheantliaclusterthegiantellipticalsngc3258andngc3268andtheirglobularclustersystems
AT richtlertom vltphotometryintheantliaclusterthegiantellipticalsngc3258andngc3268andtheirglobularclustersystems
AT dirschboris vltphotometryintheantliaclusterthegiantellipticalsngc3258andngc3268andtheirglobularclustersystems
bdutipo_str Repositorios
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