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

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

Sep 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...240..464m&link_type=abstract

Astrophysical Journal, Part 1, vol. 240, Sept. 1, 1980, p. 464-477.

Astronomy and Astrophysics

Astronomy

102

Globular Clusters, Infrared Astronomy, Magellanic Clouds, Red Giant Stars, Stellar Spectrophotometry, Asymptotic Giant Branch Stars, Carbon Stars, Hertzsprung-Russell Diagram, M Stars, Stellar Luminosity

Scientific paper

Vidicon spectra and infrared JHK photometry are presented for stars near the tip of the giant branch in a sample of red globular clusters in the Magellanic Clouds. The coverage extends considerably that of our earlier spectroscopic survey. Numerous carbon stars and some M stars are found whose luminosities place them on the upper asymptotic giant branch (i.e., above the luminosity of the helium flash). Effective temperatures based on J-K colors are given for all stars. A simplified theory of asymptotic giant branch evolution is applied to calculate ages for the full sample of clusters studied to date.

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