Last modified: December 2018

URL: http://cxc.harvard.edu/sherpa/ahelp/xsdisk.html
AHELP for CIAO 4.11 Sherpa v1

xsdisk

Context: models

Synopsis

The XSPEC disk model: accretion disk, black body.

Syntax

xsdisk

The xsdisk model is an additive model component.

Description

The model is described at [1] .

Deprecated in Sherpa 4.10.0

The NSmass parameter has been renamed to CenMass to match the XSPEC definition. The name NSmass can still be used to access the parameter, but this name will be removed in a future release.


Example

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

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

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.accrate  thawed            1        0.001            9           
   mdl.CenMass  frozen          1.4          0.4           10       Msun
   mdl.Rinn     frozen         1.03         1.01         1.03           
   mdl.norm     thawed            1            0        1e+24           

ATTRIBUTES

The attributes for this object are:

accrate

The accretion rate, in Eddington luminosities.

CenMass

The central mass, in solar mass units.

Rinn

The inner disk radius in gravitational units (three Schwarzschild radii).

norm

The normalization of the model: see [1] for details.

References

XSPEC version

CIAO 4.11 comes with support for version 12.10.0e of the XSPEC models. This can be checked with the following:

% python -c 'from sherpa.astro import xspec;
print(xspec.get_xsversion())'
12.10.0e

Bugs

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

See Also

models
xsdiskm, xsdisko