The connection between globular cluster systems and the host galaxies

A large number of early-type galaxies are now known to possess blue and red subpopulations of globular clusters. We have compiled a data base of 28 such galaxies exhibiting bimodal globular cluster colour distributions. After converting to a common V-I colour system, we investigate correlations betw...

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Detalles Bibliográficos
Autores principales: Forbes, Duncan A., Forte, Juan Carlos
Formato: Articulo
Lenguaje:Inglés
Publicado: 2001
Materias:
Ciencias Astronómicas
Galaxies: elliptical and lenticular, cD
Galaxies: evolution
Galaxies: interactions
Globular clusters: general
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84944
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84944
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: elliptical and lenticular, cD
Galaxies: evolution
Galaxies: interactions
Globular clusters: general
spellingShingle Ciencias Astronómicas
Galaxies: elliptical and lenticular, cD
Galaxies: evolution
Galaxies: interactions
Globular clusters: general
Forbes, Duncan A.
Forte, Juan Carlos
The connection between globular cluster systems and the host galaxies
topic_facet Ciencias Astronómicas
Galaxies: elliptical and lenticular, cD
Galaxies: evolution
Galaxies: interactions
Globular clusters: general
description A large number of early-type galaxies are now known to possess blue and red subpopulations of globular clusters. We have compiled a data base of 28 such galaxies exhibiting bimodal globular cluster colour distributions. After converting to a common V-I colour system, we investigate correlations between the mean colour of the blue and red subpopulations with galaxy velocity dispersion. We support previous claims that the mean colours of the blue globular clusters are unrelated to their host galaxy. They must have formed rather independently of the galaxy potential they now inhabit. The mean blue colour is similar to that for halo globular clusters in our Galaxy and M31. The red globular clusters, on the other hand, reveal a strong correlation with galaxy velocity dispersion. Furthermore, in well-studied galaxies the red subpopulation has similar, and possibly identical, colours to the galaxy halo stars. Our results indicate an intimate link between the red globular clusters and the host galaxy; they share a common formation history. A natural explanation for these trends would be the formation of the red globular clusters during galaxy collapse.
format Articulo
Articulo
author Forbes, Duncan A.
Forte, Juan Carlos
author_facet Forbes, Duncan A.
Forte, Juan Carlos
author_sort Forbes, Duncan A.
title The connection between globular cluster systems and the host galaxies
title_short The connection between globular cluster systems and the host galaxies
title_full The connection between globular cluster systems and the host galaxies
title_fullStr The connection between globular cluster systems and the host galaxies
title_full_unstemmed The connection between globular cluster systems and the host galaxies
title_sort connection between globular cluster systems and the host galaxies
publishDate 2001
url http://sedici.unlp.edu.ar/handle/10915/84944
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