SIMBAD references

1994A&A...291..831L - Astronomy and Astrophysics, volume 291, 831-841 (1994/11-3)

SiC grains and evolution of carbon stars.

LORENZ-MARTINS S. and LEFEVRE J.

Abstract (from CDS):

A set of 32 carbon stars envelopes in a large range of spectral types has been modelled. The models were performed with two kinds of grains : SiC and amorphous carbon. Contrary to our previous study each kind of grain may be formed now at different distances from the central star. Correlations between SiC/A.C. ratio abundance and extinction opacity as well as SiC/A.C. ratio and period of luminosity were found. These correlations may indicate that the quantity of SiC grains relative to amorphous carbon grains decreases with carbon star evolution. A modification in SiC feature with increasing extinction opacity seems also to be connected to this evolution.

Abstract Copyright:

Journal keyword(s): stars: carbon - circumstellar matter - radiative transfer - dust, extinction

Simbad objects: 33

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2019.10.18-05:04:10

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