Circumstellar environments. IV - Mass-loss rates for carbon stars

Details Circumstellar environments. IV - Mass-loss rates for carbon stars Circumstellar environments. IV - Mass-loss rates for carbon stars

Oct 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.234p..79s&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 234, Oct. 1, 1988, p. 79P-84P.

Astronomy and Astrophysics

Astronomy

24

Carbon Stars, Infrared Astronomy Satellite, Silicon Carbides, Stellar Envelopes, Stellar Mass Ejection, Stellar Spectra, Carbon Monoxide, Emission Spectra, Line Spectra, Molecular Spectra

Scientific paper

The authors have determined the band strengths of 11.2 μm SiC features in IRAS spectra for a number of carbon stars whose mass-loss rates have been determined earlier from the CO J = 2 → 1 or J = 1 → 0 emission lines. The strength of the 11.2 μm SiC feature is proportional to the total mass-loss rate (as measured from CO), supporting the idea that the gas-to-dust ratio is roughly constant for carbon stars. This therefore provides an easy method of calculating mass-loss rates for carbon stars which are too distant to be detected in CO. The observed correlation probably also indicates that the ratios of carbon to silicon carbide grains in the outflows increase with age.

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