Smithsonian Logo Unam Logo Laeff Logo   Description of the Disk Models


These physical disk models are the solution of two calculations: the first one is the determination of the detailed vertical structure of the accretion disk taking into account heating from the stellar radiation and from viscous disipation due to accretion. The second one is the computation of the emision maps of the disk by solving the transfer equations for thermal and scattered light in rays parallel to the line of sight and integrate them in solid angle to generate a synthetic Spectral Energy Distribution. In both computations all parameters are self-consistently calculated with the star and disk input parameters.
The models have the following properties:
- The energy is transported by radiation, convection and turbulent flux
- Heating due to viscous dissipation and stellar flux irradiation.
- Self consistent irradiation surface with hydrostatic solution to disk structure.
.. and have the following assumptions:
- Disc in steady state
- Geometrically thin
- alpha viscosity parametrization
- Dust and gas well mixed
- Radiation field is supposed to have two main regimes: stellar and disk radiation fields
- Radiative transfer solved with the two first moments of equation
A more detailed definition of the models is available in D'Alessio et al.(2004) or in the following presentation.




Bruno Merin
Last modified: Mon Sep 27 14:39:57 MET DST 2004