Is mass loss from red giant stars dust driven?

Details Is mass loss from red giant stars dust driven? Is mass loss from red giant stars dust driven?

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992dudi.work...92y&link_type=abstract

"Dusty Discs, Proceedings of the 9th RAL Workshop on Astronomy and Astrophysics. Edited by P.M. Gondhalekar.

Astronomy and Astrophysics

Astrophysics

Scientific paper

Long period variable stars on the Asymptotic Giant Branch are observed to be losing mass in the form of cool dusty molecular stellar winds at rates from 10-7 to 10-4 Msunyr-1. The driving force for this mass loss is thought to be radiation pressure on dust particles. The dust transfers its momentum to gas molecules via collisions. This paper discusses the existing evidence for this scenario. New results, from analysis of 22 GHz H2O maser observations made by Merlin, show that the cruical acceleration past the stellar escape velocity of the central star takes place in the inner circumstellar envelope around the central star. The analysis of the velocity fields of the circumstellar envelopes of VX Sgr and VY CMa using the model described by Chapman and Cohen (1986) are discussed.

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