Synopsis
A model of emission due to an accretion disk.
Syntax
accretiondisk
Description
It is for use when the independent axis is in Angstroms.
Example
>>> create_model_component("accretiondisk", "mdl")
>>> print(mdl)Create a component of the accretiondisk model and display its default parameters. The output is:
mdl Param Type Value Min Max Units ----- ---- ----- --- --- ----- mdl.ref frozen 5000 -3.40282e+38 3.40282e+38 angstroms mdl.beta thawed 0.5 -10 10 mdl.ampl thawed 1 -3.40282e+38 3.40282e+38
ATTRIBUTES
The attributes for this object are:
| Attribute | Definition |
|---|---|
| ref | The reference wavelength, in Angstroms. |
| beta | The index of the power-law component. |
| ampl | The amplitude of the disk. |
| norm | The normalization value for the position. It is a hidden parameter, with a value fixed at 20000. |
Notes
The functional form of the model for points is:
f(x) = ampl * (x / norm)^(-beta) * exp(-ref / x)
and for integrated data sets the low-edge of the grid is used.
Bugs
See the bugs pages on the Sherpa website for an up-to-date listing of known bugs.