Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...326..843r&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 326, March 15, 1988, p. 843-858.
Astronomy and Astrophysics
Astronomy
60
Cosmic Dust, Infrared Sources (Astronomy), Light Scattering, Stellar Envelopes, Stellar Mass Ejection, Variable Stars, Carbon Stars, Giant Stars, Line Of Sight, Stellar Cores, Stellar Temperature, Thermal Emission
Scientific paper
A detailed study has been performed of the spatial structure of the IRC +10216 dust shell in the wavelength range 1-5 microns. An occultation observed at 4.6 microns is deconvolved to provide a one-dimensional image. A radiometric analysis of the dust shell flux distribution is performed based on coeval photometry, leading to an estimate of the shell extinction, a decomposition of the flux into shell and stellar components, and an estimate of the temperature of the dust at the inner boundary of the shell. A simple, nonequilibrium, geometrical model of the shell is used to estimate the inner radius of the dust envelope, and detailed radiative equilibrium models based on realistic opacities and a two-component grain population are developed. The best estimates of model parameters are selected, and the limiting factors in the analysis are discussed.
Keady John Joseph
Ridgway Stephen
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