The structure of the Beta Pictoris circumstellar disk from combined IRAS and coronagraphic observations

Details The structure of the Beta Pictoris circumstellar disk from combined IRAS and coronagraphic observations The structure of the Beta Pictoris circumstellar disk from combined IRAS and coronagraphic observations

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...337..494a&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 337, Feb. 1, 1989, p. 494-513.

Astronomy and Astrophysics

Astronomy

113

Coronagraphs, Far Infrared Radiation, Main Sequence Stars, Stellar Coronas, Stellar Envelopes, Absorption Cross Sections, Cosmic Dust, Infrared Astronomy Satellite, Optical Thickness, Particle Size Distribution, Scattering Coefficients

Scientific paper

A grid of models of the particulate disk around Beta Pic is constructed in which the same grains orbiting the star give rise to both the directly observable scattered starlight and the FIR thermal radiation measured by IRAS. The spatial distribution of particles in the disk is determined to find a distribution from coronograph images (Paresce and Burrows, 1987) and used with IRAS measurements to find a distribution of matter in both the directly observable and occulted disk regions. An upper limit for the tilt between the disk ecliptic and the line of sight is determined to be 14 deg, corresponding to an infinitesimally thin disk. Also, the normal optical thickness of the disk, the grain radii, and the model-dependent geometric albedo of grains in the visible are determined. Possible grain composition is also considered.

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