A1 Refereed original research article in a scientific journal

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




AuthorsVanderbeke J, De Propris R, De Rijcke S, Baes M, West M, Alonso-Garcia J, Kunder A

PublisherOXFORD UNIV PRESS

Publication year2015

JournalMonthly Notices of the Royal Astronomical Society

Journal name in sourceMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

Journal acronymMON NOT R ASTRON SOC

Volume451

Issue1

First page 275

Last page281

Number of pages7

ISSN0035-8711

DOIhttps://doi.org/10.1093/mnras/stv928


Abstract

We use the horizontal branch (HB) morphology of 48 Galactic globular clusters (GCs) to study the radial distributions of the different stellar populations known to exist in GCs. 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 GCs. Unlike other cases, our data show that the populations are well mixed in 80 per cent of the cases studied. This provides some constraints on the mechanisms proposed to pollute the interstellar medium in young GCs.




Last updated on 2024-26-11 at 12:49