The globular clusters-stellar haloes connection in early-type galaxies

This paper explores if, and to what an extent, the stellar populations of early-type galaxies can be traced through the colour distribution of their globular cluster (GC) systems. The analysis, based on a galaxy sample from the Virgo Advanced Camera for Surveys data, is an extension of a previous ap...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Forte, Juan Carlos, Vega, Ema Irene, Faifer, Favio Raúl
Formato: Articulo
Lenguaje:Inglés
Publicado: 2009
Materias:
Ciencias Astronómicas
Galaxies: haloes
Galaxies: star clusters
Globular clusters: general
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/82695
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-82695
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: haloes
Galaxies: star clusters
Globular clusters: general
spellingShingle Ciencias Astronómicas
Galaxies: haloes
Galaxies: star clusters
Globular clusters: general
Forte, Juan Carlos
Vega, Ema Irene
Faifer, Favio Raúl
The globular clusters-stellar haloes connection in early-type galaxies
topic_facet Ciencias Astronómicas
Galaxies: haloes
Galaxies: star clusters
Globular clusters: general
description This paper explores if, and to what an extent, the stellar populations of early-type galaxies can be traced through the colour distribution of their globular cluster (GC) systems. The analysis, based on a galaxy sample from the Virgo Advanced Camera for Surveys data, is an extension of a previous approach that has been successful in the cases of the giant ellipticals NGC 1399 and NGC 4486, and assumes that the two dominant GC populations form along diffuse stellar populations sharing the cluster chemical abundances and spatial distributions. The results show that (a) integrated galaxy colours can be matched to within the photometric uncertainties and are consistent with a narrow range of ages; (b) the inferred mass to luminosity ratios and stellar masses are within the range of values available in the literature; (c) most GC systems occupy a thick plane in the volume space defined by the cluster formation efficiency, total stellar mass and projected surface mass density. The formation efficiency parameter of the red clusters shows a dependency with projected stellar mass density that is absent for the blue globulars. In turn, the brightest galaxies appear clearly detached from that plane as a possible consequence of major past mergers; (d) the stellar mass-metallicity relation is relatively shallow but shows a slope change at M* ≈ 10 10 M⊙. Galaxies with smaller stellar masses show predominantly unimodal GC colour distributions. This result may indicate that less massive galaxies are not able to retain chemically enriched interstellar matter.
format Articulo
Articulo
author Forte, Juan Carlos
Vega, Ema Irene
Faifer, Favio Raúl
author_facet Forte, Juan Carlos
Vega, Ema Irene
Faifer, Favio Raúl
author_sort Forte, Juan Carlos
title The globular clusters-stellar haloes connection in early-type galaxies
title_short The globular clusters-stellar haloes connection in early-type galaxies
title_full The globular clusters-stellar haloes connection in early-type galaxies
title_fullStr The globular clusters-stellar haloes connection in early-type galaxies
title_full_unstemmed The globular clusters-stellar haloes connection in early-type galaxies
title_sort globular clusters-stellar haloes connection in early-type galaxies
publishDate 2009
url http://sedici.unlp.edu.ar/handle/10915/82695
work_keys_str_mv AT fortejuancarlos theglobularclustersstellarhaloesconnectioninearlytypegalaxies
AT vegaemairene theglobularclustersstellarhaloesconnectioninearlytypegalaxies
AT faiferfavioraul theglobularclustersstellarhaloesconnectioninearlytypegalaxies
AT fortejuancarlos globularclustersstellarhaloesconnectioninearlytypegalaxies
AT vegaemairene globularclustersstellarhaloesconnectioninearlytypegalaxies
AT faiferfavioraul globularclustersstellarhaloesconnectioninearlytypegalaxies
bdutipo_str Repositorios
_version_ 1764820488536719360

Ejemplares similares