Synopsis
The XSPEC kerrdisk model: accretion disk line emission with BH spin as free parameter.
Syntax
xskerrdisk The xskerrdisk model is an additive model component.
Description
The model is described at [1] .
Deprecated in Sherpa 4.10.0
The r_brg , rinms , and routms parameters have been renamed to r_br_g , rin_ms , and rout_ms respectively to match the XSPEC definition. The names r_brg , rinms , and routms can still be used to access the parameters, but they will be removed in a future release.
Example
>>> create_model_component("xskerrdisk", "mdl") >>> print(mdl)
Create a component of the xskerrdisk model and display its default parameters. The output is:
mdl Param Type Value Min Max Units ----- ---- ----- --- --- ----- mdl.lineE frozen 6.4 0.1 100 keV mdl.Index1 frozen 3 -10 10 mdl.Index2 frozen 3 -10 10 mdl.r_br_g frozen 6 1 400 mdl.a thawed 0.998 0.01 0.998 mdl.Incl frozen 30 0 90 deg mdl.Rin_ms frozen 1 1 400 mdl.Rout_ms frozen 400 1 400 mdl.z frozen 0 0 10 mdl.norm thawed 1 0 1e+24
ATTRIBUTES
The attributes for this object are:
Attribute | Definition |
---|---|
lineE | The rest-frame line energy, in keV. |
Index1 | The emissivity index for the inner disk. |
Index2 | The emissivity index for the outer disk. |
r_br_g | The break radius separating the inner and outer portions of the disk, in gravitational radii. |
a | The dimensionless black hole spin. |
Incl | The disk inclination angle, in degrees. A face-on disk has Incl=0. |
Rin_ms | The inner radius of the disk, in units of the radius of marginal stability. |
Rout_ms | The outer radius of the disk, in units of the radius of marginal stability. |
z | The redshift of the source. |
norm | The flux in the line, in units of photon/cm^2/s. |
References
- [1] https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelKerrdisk.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.
See Also
- models
- xskerrconv