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

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.

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

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• The Dynamics of Multiple Populations in the Globular Cluster NGC 6362
• Chemical Complexity in the Eu-enhanced Monometallic Globular Cluster NGC 5986
• Chromosome maps of Globular Clusters from wide-field ground-based photometry
• Accretion of sub-stellar companions as the origin of chemical abundance inhomogeneities in globular clusters
• Chemical Tagging N-rich Field Stars with High-resolution Spectroscopy
• Hubble Space Telescope FUV observations of M31's globular clusters suggest a spatially homogeneous helium-enriched sub population
• Photometric Detection of Multiple Populations in Globular Clusters Using Integrated Light
• Study of UV bright stellar populations in the globular cluster NGC 1261 using AstroSat
• A Careful Reassessment of Globular Cluster Multiple Population Radial Distributions with Sloan Digital Sky Survey and Johnson-Cousins Broadband Photometry
• Re-examining the Radial Distributions of M13 Multiple Populations
• S-PLUS: Exploring wide field properties of multiple populations in galactic globular clusters at different metallicities