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Age as a major factor in the onset of multiple populations in stellar clusters

Martocchia, S.; Cabrera-Ziri, I.; Lardo, C.; Dalessandro, E.; Bastian, N.; Kozhurina-Platais, V; Usher, C.; Niederhofer, F.; Cordero, M. J.; Geisler, D; Hollyhead, K.; Kacharov, N.; Larsen, S. S.; Li, C.; Mackey, Alasdair


It is now well established that globular clusters (GCs) exhibit star-to-star light-element abundance variations (known as multiple populations, MPs). Such chemical anomalies have been found in (nearly) all the ancient GCs (more than 10 Gyr old) of our Galaxy and its close companions, but so far no model for the origin of MPs is able to reproduce all the relevant observations. To gain new insights into this phenomenon, we have undertaken a photometric Hubble Space Telescope survey to study...[Show more]

CollectionsANU Research Publications
Date published: 2018
Type: Journal article
Source: Monthly Notices of the Royal Astronomical Society
DOI: 10.1093/mnras/stx2556
Access Rights: Open Access


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