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Are the globular clusters with significant internal [Fe/H] spreads all former dwarf galaxy nuclei?

Published online by Cambridge University Press:  09 May 2016

G. S. Da Costa
G. S. Da Costa*
Affiliation:
Research School of Astronomy & Astrophysics, Australian National University email: [email protected]
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Abstract

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In this contribution the hypothesis that the Galactic globular clusters with substantial internal [Fe/H] abundance ranges are the former nuclei of disrupted dwarf galaxies is discussed. Evidence considered includes the form of the metallicity distribution function, the occurrence of large diffuse outer envelopes in cluster density profiles, and the presence of ([s-process/Fe], [Fe/H]) correlations. The hypothesis is shown to be plausible but with the caveat that if significantly more than the current nine clusters known to have [Fe/H] spreads are found, then re-evaluation will be required.

Keywords

Globular ClustersDwarf GalaxiesNuclear Star Clusters
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Issue S317: The General Assembly of Galaxy Halos: Structure, Origin and Evolution , August 2015 , pp. 110 - 115
Copyright
Copyright © International Astronomical Union 2016 

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