CO(J = 1-0) observations of bright carbon stars

Details CO(J = 1-0) observations of bright carbon stars CO(J = 1-0) observations of bright carbon stars

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...183l..13o&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 183, no. 2, Sept. 1987, p. L13-L16.

Astronomy and Astrophysics

Astrophysics

61

Carbon Monoxide, Carbon Stars, Far Infrared Radiation, Stellar Luminosity, Stellar Mass Ejection, Stellar Spectrophotometry, Mass Flow Rate, Stellar Composition, Stellar Envelopes

Scientific paper

The authors have surveyed a sample of bright N-type stars, with recent estimates of chemical composition, in the CO(J = 1-0) line. Almost all stars were detected. The mass loss rate is well correlated with a far-IR excess measure, and the gas-to-dust mass ratio, estimated to be 350±200, seems relatively constant for this sample of stars. The mass loss rate appears to be dependent on the effective temperature, the carbon excess, and the 12C/13C-ratio of the central star. In particular, the peculiar 13C-rich stars have comparatively low mass loss rates. A weak dependence of gas expansion velocity of the circumstellar envelope on the carbon excess may exist.

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