IRC +10216 circumstellar envelope. II. Spatial measurements of the dust

Journal Article · Tue Mar 01 04:00:00 EST 1988 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/166142· OSTI ID:7222589

Ridgway, S; Keady, J J

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. 18 references.

• Research Organization: Kitt Peak National Observatory, Tucson, AZ (USA); Los Alamos National Lab., NM (USA)
• OSTI ID: 7222589
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 326; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARBON STARS
COSMIC DUST
DUSTS
GIANT STARS
LIGHT SCATTERING
LIMITING VALUES
MAIN SEQUENCE STARS
MATHEMATICAL MODELS
MORPHOLOGY
PHOTOMETRY
SCATTERING
SHELLS
STARS
TEMPERATURE MEASUREMENT
VARIABLE STARS