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Oxford University Press, Monthly Notices of the Royal Astronomical Society, 1(451), p. 275-281, 2015

DOI: 10.1093/mnras/stv928

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G2C2 - IV: A novel approach to study the radial distributions of multiple populations in Galactic globular clusters

Journal article published in 2015 by Joachim Vanderbeke, Roberto De Propris, Sven De Rijcke, Maarten Baes ORCID, Michael West, Javier Alonso-García, Andrea Kunder ORCID
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This paper is available in a repository.

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Abstract

We use the HB morphology of 48 Galactic GCs to study the radial distributions of the different stellar populations known to exist in globular clusters. Assuming that the (extremely) blue HB stars correspond to stars enriched in Helium and light elements, we compare the radial distributions of stars selected according to colour on the HB to trace the distribution of the secondary stellar populations in globular clusters. Unlike other cases, our data show that the populations are well mixed in 80% of the cases studied. This provides some constraints on the mechanisms proposed to pollute the interstellar medium in young globular clusters. ; Comment: 8 pages, 6 figures. The complete table of the KS statistics and figures for all the sample clusters showing the cumulative radial distributions can be found in the online appendix. Accepted for publication in MNRAS