Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...274..286h&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 274, Nov. 1, 1983, p. 286-301.
Astronomy and Astrophysics
Astrophysics
36
Chromosphere, Giant Stars, Stellar Envelopes, Stellar Mass Ejection, Supergiant Stars, Astronomical Catalogs, Cosmic Dust, Interstellar Gas, Late Stars, Shock Wave Propagation
Scientific paper
A survey of the circumstellar (CS) envelopes of cool giants and supergiants shows no correlation between the quantities of CS gas and dust, indicating that radiation pressure on dust grains is not the principal mechanism of mass loss. The observed quantity of dust is not sufficient to drive the observed mass loss. Stars with high dust-to-gas ratios were also seen to show a high proportion of neutral to ionized gas and a lack of Ca II H and K emission, and in many cases, Balmer emission, and/or molecular masing. It is argued that shock waves may be linked to dust formation. Mass loss rates were derived for the program stars and found to correlate with K4 absorption width, indicating that the mass loss mechanism may be coupled to turbulence.
Dickinson Dale F.
Hagen Wim
Stencel Robert E.
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