Statistics – Computation
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pasj...44..669f&link_type=abstract
PASJ: Publications of the Astronomical Society of Japan (ISSN 0004-6264), vol. 44, no. 6, p. 669-676.
Statistics
Computation
10
Accretion Disks, Boundary Layers, Protoplanets, Surface Temperature, T Tauri Stars, Computational Astrophysics, Radiation Spectra
Scientific paper
The structure and spectrum of accretion disks irradiated by the boundary layer between a central star and the disk are examined. A self-consistent model is analytically obtained which is important for protoplanetary disks in which the disk luminosity exceeds the star luminosity. The entire disk is divided into two regions: an inner disk where viscous heating is dominant and an outer disk where irradiation heating is dominant. In the inner disk the surface temperature decreases as r exp -3/4, while it decreases as r exp -3/7 in the outer disk. The boundary between the inner and outer disks lies at a few AU. The emergent spectra from such a disk is calculated. In the high-frequency part where radiation from the inner viscous disk is dominant, the observed flux varies as nu exp 4/3, where nu is the frequency, and it varies as nu exp -2/3 in the low-frequency part where radiation from the outer irradiated disk is dominant.
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