Other
Scientific paper
Nov 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...298..240r&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 298, Nov. 1, 1985, p. 240-248. NSERC-supported research.
Other
39
Abundance, Carbon Stars, Late Stars, Stellar Luminosity, Stellar Spectrophotometry, Calibrating, Galaxies, Metallicity
Scientific paper
A 15 square arcmin field in NGC 300 was observed through 4 filters with the CTIO 4 m prime focus CCD. Two of the filters were broad-band V and I and the other two isolated TiO (λ7800) and CN (λ8100). With this filter set, it is possible to unambiguously distinguish late-type carbon stars from M stars. Sixteen late-type C stars and 25 cool M stars were discovered in the NGC 300 field. Two of the latter stars may lie in the foreground. The ratio of C to M stars indicates a modestly metal-deficient system ([Fe/H] = -0.5). A new distance modulus to NGC 300 is derived using carbon stars, and the value (m-M)0 = 25.87 is significantly smaller than most in the current literature. The full asymptotic giant branch (AGB) luminosity function of the field observed is obtained and compared with that for the LMC.
Crabtree Dennis Richard
Pritchet Chris J.
Richer Harvey B.
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