Synopsis
The XSPEC vmcflow model: cooling flow, mekal.
Syntax
xsvmcflow The xsvmcflow model is an additive model component.
Description
The model is described at [1] . The results of this model depend on the cosmology settings set with set_xscosmo .
Example
>>> create_model_component("xsvmcflow", "mdl") >>> print(mdl)
Create a component of the xsvmcflow model and display its default parameters. The output is:
mdl Param Type Value Min Max Units ----- ---- ----- --- --- ----- mdl.lowT thawed 0.1 0.0808 79.9 keV mdl.highT thawed 4 0.0808 79.9 keV mdl.He frozen 1 0 1000 mdl.C frozen 1 0 1000 mdl.N frozen 1 0 1000 mdl.O frozen 1 0 1000 mdl.Ne frozen 1 0 1000 mdl.Na frozen 1 0 1000 mdl.Mg frozen 1 0 1000 mdl.Al frozen 1 0 1000 mdl.Si frozen 1 0 1000 mdl.S frozen 1 0 1000 mdl.Ar frozen 1 0 1000 mdl.Ca frozen 1 0 1000 mdl.Fe frozen 1 0 1000 mdl.Ni frozen 1 0 1000 mdl.redshift frozen 0 0 10 mdl.switch frozen 1 -3.40282e+38 3.40282e+38 mdl.norm thawed 1 0 1e+24
ATTRIBUTES
The attributes for this object are:
Attribute | Definition |
---|---|
lowT | The minimum temperature, in keV. |
highT | The maximum temperature, in keV. |
He, C, N, O, Ne, Na, Mg, Al, Si, S, Ar, Ca, Fe, Ni | The abundance relative to Solar. |
redshift | The redshift of the plasma. |
switch | If 0, the mekal code is run to evaluate the model; if 1 then interpolation of the mekal data is used; if 2 then interpolation of APEC data is used. See [1] for more details. This parameter can not be thawed. |
norm | The mass accretion rate (solar mass per year). |
References
- [1] https://heasarc.gsfc.nasa.gov/xanadu/xspec/manual/XSmodelMkcflow.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
- xsmkcflow