The distances of nearby cool carbon stars

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Carbon Stars, Stellar Evolution, Stellar Motions, Bolometers, Graphite, Hertzsprung-Russell Diagram, Radii, Spectral Energy Distribution, Star Distribution, Stellar Envelopes, Stellar Luminosity, Stellar Mass Ejection, Stellar Spectrophotometry, Stellar Structure

Scientific paper

Distance ratios are provided for 38 cool carbon stars on the basis of a previous study (Bergeat et al., 1976). The validation of this distance scale is obtained through an analysis of stellar velocities. A relationship is established between proper motions and the distance scale. Luminosities and radii are derived for cool carbon stars which permit a discussion of their evolutionary status. Finally, evaluations are given for the rate of mass ejection corresponding to large graphite grains.

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