Spectral classification of carbon stars in Magellanic Cloud clusters

Details Spectral classification of carbon stars in Magellanic Cloud clusters Spectral classification of carbon stars in Magellanic Cloud clusters

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.193...97l&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 193, Oct. 1980, p. 97-105.

Astronomy and Astrophysics

Astronomy

33

Carbon Stars, Globular Clusters, Late Stars, Magellanic Clouds, Stellar Spectra, Reference Stars, Star Clusters, Star Distribution, Stellar Mass, Variable Stars

Scientific paper

Image tube spectra of 33 stars in 17 Magellanic Cloud clusters and six stars in the field of the SMC are discussed. Nineteen of the 21 carbon stars have been classified on Yamashita's (1972) system. None of these stars, which have M(v) not less than -3, has strong C-13 features. The weakness of CN relative to C2 suggests an affinity to CH stars in the Galaxy, in accordance with the idea that intermediate age clusters in the Magellanic Clouds are metal-deficient. Stars with strong H-alpha emission are usually variables of large amplitude, and a period of 115 day is found for a new red variable in NGC121 which has bright H-alpha.

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