Why the globular cluster NGC 6752 contains no sodium-rich second-generation AGB stars

2013/09/01 by Corinne Charbonnel, William Chantereau, Thibaut Decressin +2
Physics and Astronomy · Social Sciences · #Astronomy and Astrophysical Research #Asymptotic giant branch #Educational Leadership and Practices #Globular cluster #Horizontal branch #Red-giant branch #Stars #Stellar collision #Stellar evolution #Stellar, planetary, and galactic studies #astro-ph.SR

paper · pdf · doi:10.1051/0004-6361/201322422

A&A Letter, in press

openalex publication_date 2013/09/01 · arxiv created 2013/09/09 · arxiv updated 2015/06/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Context. Globular clusters host multiple stellar populations showing different sodium enrichments. These various populations can be observed along the main sequence, red giant and horizontal branch phases. Recently it was shown, however, that at least in the globular cluster NGC 6752, no sodium-rich stars are observed along the early asymptotic giant branch (AGB), posing an apparent problem for stellar evolution.

Citations

• A Catalog of Parameters for Globular Clusters in the Milky Way
• A critical test of empirical mass loss formulas applied to individual giants and supergiants
• Signatures of intrinsic Li depletion and Li-Na anti-correlation in the metal-poor globular cluster NGC 6397
• The second and third parameters of the horizontal branch in globular clusters
• Multiple populations in globular clusters. Lessons learned from the Milky Way globular clusters
• Na-O anticorrelation and HB