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

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

Jan 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...288..551a&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 288, Jan. 15, 1985, p. 551-557.

Astronomy and Astrophysics

Astrophysics

77

Carbon Stars, Giant Stars, Magellanic Clouds, Star Clusters, Stellar Evolution, Globular Clusters, Hertzsprung-Russell Diagram, Late Stars, Stellar Mass

Scientific paper

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.

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