A multi-temperature blackbody model for a thin, steady-state, Newtonian accretion disk, assuming zero torque at the inner boundary for the disk at radius . The temperature of the disk as a function of radius is assumed to be , where and . The maximum temperature in the disk is given by .
This model is an alternative to diskbb, which assumes a non-zero torque at the inner edge and a temperature profile , and it should be used to fit spectra of disks when the zero-torque inner boundary condition is appropriate. For details see Zimmerman et al. (2005).
|par1||maximum temperature in the disk (keV)|
|norm||normalization = , where is the inner radius of the disk in km, is the distance to the source in units of 10 kpc, is the inclination, and is the color to effective temperature ratio.|