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Ages of Globular Cluster Systems and the Relation to Galaxy Morphology

Published online by Cambridge University Press:  05 December 2011

A. L. Chies-Santos ,
S. S. Larsen ,
H. Kuntschner ,
P. Anders ,
E. M. Wehner ,
J. Strader ,
J. P. Brodie  and
J. F. C. Santos Jr
A. L. Chies-Santos
Affiliation:
Sterrenkundig Instituut, University of Utrecht, The Netherlands email: [email protected]
S. S. Larsen
Affiliation:
Sterrenkundig Instituut, University of Utrecht, The Netherlands email: [email protected]
H. Kuntschner
Affiliation:
ST-ECF/ESO, Germany
P. Anders
Affiliation:
Sterrenkundig Instituut, University of Utrecht, The Netherlands email: [email protected]
E. M. Wehner
Affiliation:
Sterrenkundig Instituut, University of Utrecht, The Netherlands email: [email protected]
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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We investigate the age distributions of GC systems in 14 E/S0 galaxies by carrying out a differential comparison of the (g–z) vs. (g–K) two-colour diagrams for different GC systems. No significant distinction is detected in the mean ages of GCs among elliptical galaxies. S0 galaxies on the other hand, show evidence for younger GCs. Surprisingly, this appears to be driven by the more metal-poor clusters. This is suggestive of E type galaxies having assembled most of their GCs in a shorter and earlier period than lenticular galaxies. The latter galaxy type, seems to have a more extended period of GC formation/assembly.

Keywords

galaxies: star clustersgalaxies: elliptical and lenticulargalaxies: star clusters
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S277: Tracing the Ancestry of Galaxies (on the land of our ancestors) , December 2010 , pp. 321 - 324
Copyright
Copyright © International Astronomical Union 2011

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