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1998ApJ...508..831L - Astrophys. J., 508, 831-837 (1998/December-1)
On water masers in circumstellar shells.
LEWIS B.M.
Abstract (from CDS):
The main input of energy (and momentum) to gas in a circumstellar shell comes from friction with dust particles driven through it by radiation pressure. In consequence, the switch between radial-gain masers in OH 39.7 + 1.5 that predominate near maximum light and a tangential-gain maser that can occur near minimum may result entirely from the pulsation-dependent temperature modulation of the shell. However, the fast polar wind in red supergiants is already well developed in the water masing zone, so its causality is probably located within the star itself.
Abstract Copyright: ∼
Journal keyword(s): Stars: Circumstellar Matter - Masers - Radio Lines: Stars - Stars: AGB and Post-AGB - Stars: Supergiants
Simbad objects: 16
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