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An optical/near-infrared survey of GCs in early-type galaxies

Published online by Cambridge University Press:  18 January 2010

A. L. Chies-Santos ,
S. S. Larsen ,
E. M. Wehner ,
H. Kuntschner ,
J. Strader ,
J. P. Brodie  and
J. F. C. Santos Jr.
A. L. Chies-Santos
Affiliation:
Sterrenkundig Instituut, University of Utrecht, The Netherlands email: a.l.chies@uu.nl
S. S. Larsen
Affiliation:
Sterrenkundig Instituut, University of Utrecht, The Netherlands email: a.l.chies@uu.nl
E. M. Wehner
Affiliation:
Sterrenkundig Instituut, University of Utrecht, The Netherlands email: a.l.chies@uu.nl
H. Kuntschner
Affiliation:
ST–ECF/ESO, Germany
J. Strader
Affiliation:
Harvard CfA, USA
J. P. Brodie
Affiliation:
UCO/Lick Observatory, USA
J. F. C. Santos Jr.
Affiliation:
UFMG, Brazil
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Abstract

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Optical/near-infrared observations of 14 globular cluster (GC) systems in early-type galaxies are presented. We investigate the recent claims (Yoon et al. 2006) of colour bimodality in GC systems being an artefact of the nonlinear colour–metallicity transformation driven by horizontal-branch morphology. Taking advantage of the fact that the combination of optical and near-infrared colours can, in principle, break the age/metallicity degeneracy we also analyse age distributions in these systems.

Keywords

galaxies: star clustersgalaxies: elliptical and lenticularcDgalaxies: star clusters

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