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Sources of Stardust in the Galaxy

Published online by Cambridge University Press:  23 September 2016

Robert D. Gehrz
Robert D. Gehrz*
Affiliation:
Department of Astronomy, School of Physics and Astronomy, 16 Church Street, S. E., University of Minnesota, Minneapolis, MN 55455

Abstract

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Observed mass loss rates and Galactic stellar population distributions are used to estimate the rate of injection of stardust into the ISM. M stars and RLOH/IR Stars produce most of the silicates; most of the carbon and SiC comes from carbon stars. WR stars, novae, and supernovae may eject dust with chemical anomalies. There is little observational evidence for a major stellar source of hydrocarbon grains. The Galactic dust ecology considered by comparing stellar dust injection with depletion by star formation and supernova shocks suggests that dust grains are produced by accretion in molecular clouds at 1 to 5 times the stellar rate.

Type
Section VIII: Dust Formation and Destruction
Information
Symposium - International Astronomical Union , Volume 135: Interstellar Dust , 1989 , pp. 445 - 453
Copyright
Copyright © Kluwer 1989 

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