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Mass loss from red giant stars. II - Carbon starsA millimeter-wave survey has been made of bright relatively unobscured, carbon stars, chosen on the basis of their optical properties. Out of 26 program objects, (J = 2-1)CO emission is detected from 15. Most of these had not been previously detected. There are many differences among the observed objects, but one rather interesting trend emerges: a positive correlation, at moderate IR excesses, between the IR dust emission and the expansion velocity of the dense wind. A similar, positive correlation with the mass-loss rate implies that stars with larger mass fluxes also accelerate them to larger velocities. At high-IR excesses, both correlations break down, and the momentum rate may be limited by the momentum rate of the stellar radiation. All these effects could be ascribed to differences in the gas-to-dust ratio, assuming that radiation pressure initiates and accelerates the wind.
Document ID
19900054794
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Wannier, P. G.
(JPL Pasadena, CA, United States)
Sahai, R.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Andersson, B.-G.
(Goteborg, Universitet Sweden)
Johnson, H. R.
(Indiana University Bloomington, United States)
Date Acquired
August 14, 2013
Publication Date
July 20, 1990
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 358
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
90A41849
Funding Number(s)
CONTRACT_GRANT: NFR-F-FU-8746-100
Distribution Limits
Public
Copyright
Other

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