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

Abstract

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.

To appear in the Proceedings of IAU Symposium 317, The General Assembly of Galaxy Halos: Structure, Origin and Evolution, eds A. Bragaglia, M. Arnaboldi, M. Rejkuba & D. Romano. 6 pages, 1 figure

References in corpus (13)

• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. III. A quintuple stellar population in NGC2808
• Iron and s-elements abundance variations in NGC5286: comparison with anomalous globular clusters and Milky Way satellites
• Multi-Element Abundance Measurements from Medium-Resolution Spectra. IV. Alpha Element Distributions in Milky Way Dwarf Satellite Galaxies
• Iron and neutron-capture element abundance variations in the globular cluster M2 (NGC 7089)
• The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. II. The seven stellar populations of NGC7089 (M2)
• The HST/ACS Coma Cluster Survey. X. Nuclear star clusters in low-mass early-type galaxies: scaling relations
• Contribution of stripped nuclear clusters to globular cluster and ultra-compact dwarf galaxy populations
• Kinematic Decoupling of Globular Clusters with Extended Horizontal-Branch
• A Spectroscopic Analysis of the Galactic Globular Cluster NGC 6273 (M19)
• A chemical trompe-l'œil: no iron spread in the globular cluster M22
• The halo+cluster system of the Galactic globular cluster NGC1851
• The origin of the spurious iron spread in the globular cluster NGC 3201
• Proper motions in Terzan 5: membership of the multi-iron sub-populations and first constrain to the orbit

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