Dust Grains in the Envelopes of Infrared Carbon Stars

Details Dust Grains in the Envelopes of Infrared Carbon Stars Dust Grains in the Envelopes of Infrared Carbon Stars

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jass....9..183s&link_type=abstract

Journal of Astronomy and Space Sciences, vol.9, no.2, 183-192.

Astronomy and Astrophysics

Astronomy

Scientific paper

We have investigated the properties of dust grains in the envelopes of infrared carbon stars by testing various radiative transfer model spectra with different stellar and envelope parameters. We have deduced a new opacity pattern for the dust grains reflecting both the experimental data and the model fitting with recent infrared phous carbon with a slight modification that could be attributed to some unknown dust grain materials. Unlike oxygen-rich dust grains, the optical properties of carbon grains do not show any reasonable tendency of temperature dependence. We find that the Planck mean values of radiation pressure efficiency factors for the modified amorphous carbon are much larger than those for graphite.

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