Thumbnail
Access Restriction
Open

Author Bell, K. R.
Source CiteSeerX
Content type Text
File Format PDF
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Luminous Disk ♦ Temperature Profile ♦ Stellar Source ♦ Local Opacity ♦ Disk Reprocessing ♦ Surface Temperature ♦ Active Accretion ♦ Power-law Temperature Profile ♦ Power-law Infrared Seds ♦ Photospheric Thickness ♦ Protostellar Disk ♦ Black Body Spectral Energy Distribution ♦ Decreasing Curvature Disk ♦ Typical Observation ♦ Disk Model ♦ Stellar Photon Result ♦ Young Stellar Object ♦ Radiation Source
Abstract We develop and investigate a procedure that accounts for disk reprocessing of photons that originate in the disk itself. Surface temperatures and simple, black body spectral energy distributions (SEDs) of protostellar disks are calculated. In disks that flare with radius, reprocessing of stellar photons results in temperature profiles which are not power-law at all radii but are consistently shallower than r \Gamma3=4 . Including the disk as a radiation source (as in the case of active accretion) along with the stellar source further flattens the temperature profile. Disks that flare strongly near the star and then smoothly curve over and become shadowed at some distance ("decreasing curvature" disks) exhibit nearly power-law temperature profiles which result in power-law infrared SEDs with slopes in agreement with typical observations of young stellar objects. Disk models in which the photospheric thickness is controlled by the local opacity and in which the temperature decreases wi...
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study