Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...336..924j&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 336, Jan. 15, 1989, p. 924-936. Research supported by NASA.
Astronomy and Astrophysics
Astronomy
37
Carbon Stars, Milky Way Galaxy, Sky Surveys (Astronomy), Stellar Luminosity, Metallicity, Radiation Pressure, Solar Neighborhood, Spatial Distribution, Spectral Bands, Stellar Magnitude
Scientific paper
K-band magnitudes of 211 carbon stars in the Galactic anticenter are presented. The surface density, brightness range, and observed colors of stars in the sample are discussed. It is suggested that the K-band extinction gradient in the Galactic plane near l = 180 deg is between 0.15 and 0.3/kpc. In contrast to the total density of stars, it is found that the density of high-luminosity carbon stars does not decrease in the anticenter region out to at least 3 kpc from the sun. It is proposed that this is due to the fact that lower metallicity stars spend more time as carbon stars compared to stars of solar metallicity. Also, it is shown that the average mass-loss rates from high-luminosity carbon stars in the anticenter direction appear to be lower by a factor of 1.7 than those for carbon stars in the solar neighborhood.
Joyce Richard R.
Jura Michael
Kleinmann Susan G.
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