The Helium content of Globular Clusters: light element abundance correlations and HB morphology. I. NGC6752

Details The Helium content of Globular Clusters: light element abundance correlations and HB morphology. I. NGC6752 The Helium content of Globular Clusters: light element abundance correlations and HB morphology. I. NGC6752

2009-03-23

arxiv.org/abs/0903.3924v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

9 pages, 7 figures, 7 figures, accepted for publication on A&A

Scientific paper

Helium has been proposed as the key element to interpret the observed multiple main sequences (MS), subgiant branches (SGB) and red giant branches (RGB), as well as the complex horizontal branch (HB) morphology in Globular Clusters (GC). However, up to now, He was never directly measured in suitable GC stars (8500

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