Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984msngr..36...12a&link_type=abstract
ESO Messenger (ISSN 0722-6691), June 1984, p. 12-15.
Astronomy and Astrophysics
Astronomy
5
Carbon Stars, Dwarf Galaxies, Galactic Evolution, Local Group (Astronomy), Astronomical Spectroscopy, Asymptotic Giant Branch Stars, Magellanic Clouds, Stellar Composition, Wolf-Rayet Stars
Scientific paper
The serendipitous discovery of several carbon stars in the Magellanic Clouds while a survey of WR stars was being performed led to initiation of a search for other carbon stars in Local Group galaxies. Carbon stars are known to have a C/O ratio higher than unity and are members of the asymptotic giant branch (AGB), i.e., possess a shell structure consisting of a degenerate C-O nucleus, a radiative He layer and a convective hydrogen envelope. No oxides (except CO) are observed in carbon stars. The survey is being carried out at the CN bands 7945, 8125 and 8320 A. The survey has thus far found carbon stars in the Smaller Magellanic Cloud and the dwarf galaxies Sculptor, Fornax, Leo I and Leo II.
Azzopardi Marc
Westerlund Bengt E.
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