The low-luminosity J-type carbon stars

Details The low-luminosity J-type carbon stars The low-luminosity J-type carbon stars

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.220..723e&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 220, June 1, 1986, p. 723-735.

Astronomy and Astrophysics

Astronomy

26

Carbon Stars, Magellanic Clouds, Star Clusters, Stellar Composition, Stellar Luminosity, Asymptotic Giant Branch Stars, Milky Way Galaxy, Stellar Color, Stellar Evolution, Stellar Temperature

Scientific paper

The He shell flash mechanism does not account for the 13C-rich carbon stars (J stars) found on the lower fringe of the luminosity distribution of carbon stars in Magellanic Cloud clusters. Most cluster carbon stars have weak 13C, like most of the N-type carbon stars in the Galaxy. Galactic R stars almost all have enhanced 13C. They have normal abundances of s-process elements, whereas N stars have large overabundances. These differences suggest a real physical distinction. The faint J stars in the Magellanic Clouds fall on the upper part of the asymptotic giant branch. Enhanced 13C is also expected in the most of the N-type carbon stars in the galaxy. Galactic R stars almost all have enhanced 13C.

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