Bibcode
Cassisi, Santi; Bragaglia, Angela; Gratton, Raffaele; Milone, Antonino; Piotto, Giampaolo; Renzini, Alvio
Bibliographical reference
The Messenger, vol. 134 supplement, p. 13-17
Advertised on:
12
2008
Citations
2
Refereed citations
2
Description
An increasing number of both photometric and spectroscopic observations
over the last decade have shown the existence of distinct
sub-populations in some Galactic globular clusters. This evidence
severely challenges the paradigm of globular clusters as the prototypes
of single, simple stellar populations. In this review, we briefly
summarise the main empirical findings collected so far and discuss the
properties of these sub-populations and their possible relationship with
global cluster properties.