Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...196..761a&link_type=abstract
Astrophysical Journal, vol. 196, Mar. 15, 1975, pt. 1, p. 761-768.
Astronomy and Astrophysics
Astronomy
20
Cosmic Dust, Infrared Stars, Radiative Transfer, Stellar Envelopes, Infrared Astronomy, Spatial Distribution, Spectral Energy Distribution
Scientific paper
The radiative transfer techniques described elsewhere by the author have been employed to construct dust envelope models of several well known infrared stars. The resulting calculations indicate that the infrared emissivity of circumstellar grains generally must be higher than that which many calculations of small nonsilicate grains yield. This conclusion is dependent to some degree on the (unknown) size of the stellar envelopes considered, but is quite firm in the case of the spatially resolved envelope of IRC + 10216. Further observations of the spatial distribution of the infrared radiation from stellar envelopes will be invaluable in deciphering the properties of the circumstellar grains.
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