The extended giant branches of intermediate age globular clusters in the Magellanic Clouds. IV

Abstract

view Abstract Citations (78) References (49) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The extended giant branches of intermediate age globular clusters in the Magellanic Clouds. IV. Aaronson, M. ; Mould, J. Abstract A complete survey is available for asymptotic giant-branch stars in the rich star clusters of the Magellanic Clouds. Although data on the main-sequence turnoffs of these clusters are still incomplete, some systematic properties of these stars emerge, when grouped by cluster age. Clusters younger than approximately 8 billion years have carbon stars at the tip of the giant branch, produced by the third dredge-up mechanism. Clusters younger than approximately 0.8 billion years have giant branches populated by M stars. It is suggested that in stars of this mass range thermal pulses have not commenced before mass loss completely erodes the stellar envelope. Cluster stars of 5 solar mass (turnoff approximately 80 million years) suffer about 80-percent mass loss in the course of their evolution, compared with approximately 30 percent for the oldest stars. Publication: The Astrophysical Journal Pub Date: January 1985 DOI: 10.1086/162820 Bibcode: 1985ApJ...288..551A Keywords: Carbon Stars; Giant Stars; Magellanic Clouds; Star Clusters; Stellar Evolution; Globular Clusters; Hertzsprung-Russell Diagram; Late Stars; Stellar Mass; Astrophysics full text sources ADS | data products SIMBAD (35) NED (32) Related Materials (3) Part 1: 1980ApJ...240..464M Part 2: 1982ApJS...48..161A Part 3: 1982ApJ...263..629M