Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.231..169s&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 231, March 1, 1988, p. 169-174.
Astronomy and Astrophysics
Astronomy
21
Cool Stars, Silicates, Stellar Atmospheres, Stellar Envelopes, Stellar Mass Ejection, Stellar Spectra, Carbon Monoxide, Giant Stars, Interstellar Matter, Oxygen, Stellar Luminosity
Scientific paper
The band strengths of the 9.7 μm circumstellar silicate dust features have been obtained for a number of oxygen-rich red giant and supergiant stars whose mass loss rates have been determined using the CO (J = 2 - 1) and (J = 1 - 0) emission lines. The authors show that the strength of the 9.7 μm silicate dust feature is directly proportional to the mass loss rate (so long as the feature remains optically thin), indicating that the dust-to-gas ratio is approximately constant for oxygen-rich stars. The silicate dust feature thus provides a method of measuring mass loss rates for oxygen-rich red giants and supergiants, which are too distant to be detected in CO.
Skinner Christopher J.
Whitmore Bradley
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