xsdiskm

Context: models

Synopsis

The XSPEC diskm model: accretion disk with gas pressure viscosity.

Syntax

xsdiskm

The xsdiskm model is an additive model component.

Description

The model is described at [1] .

Example

>>> create_model_component("xsdiskm", "mdl")
>>> print(mdl)

Create a component of the xsdiskm model and display its default parameters. The output is:

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.accrate  thawed            1       0.0001           10           
   mdl.NSmass   frozen          1.4          0.1           20       Msun
   mdl.Rinn     frozen         1.03            1         1.04           
   mdl.alpha    frozen            1        0.001           20           
   mdl.norm     thawed            1            0        1e+24

ATTRIBUTES

The attributes for this object are:

Attribute	Definition
accrate	The accretion rate, in Eddington luminosities.
NSmass	The central mass, in solar mass units.
Rinn	The inner disk radius in gravitational units (three Schwarzschild radii).
alpha	The viscosity.
norm	The normalization of the model: see [1] for details.

References

[1] https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelDiskm.html

XSPEC version

CIAO 4.16 comes with support for version 12.13.1e of the XSPEC models. This can be checked with the following:

% python -c 'from sherpa.astro import xspec;
print(xspec.get_xsversion())'
12.13.1e

Bugs

See the bugs pages on the Sherpa website for an up-to-date listing of known bugs.