Abstract
view Abstract Citations (44) References (72) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The circumstellar envelopes and chromospheres of cool giants and supergiants. Hagen, W. ; Stencel, R. E. ; Dickinson, D. F. Abstract 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. Publication: The Astrophysical Journal Pub Date: November 1983 DOI: 10.1086/161446 Bibcode: 1983ApJ...274..286H Keywords: Chromosphere; Giant Stars; Stellar Envelopes; Stellar Mass Ejection; Supergiant Stars; Astronomical Catalogs; Cosmic Dust; Interstellar Gas; Late Stars; Shock Wave Propagation; Astrophysics full text sources ADS | data products SIMBAD (42)
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