xscflow

Context: models

Synopsis

The XSPEC cflow model: cooling flow.

Syntax

xscflow

The xscflow 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("xscflow", "mdl")
>>> print(mdl)

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

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.slope    thawed            0           -5            5           
   mdl.lowT     thawed          0.1       0.0808         79.9        keV
   mdl.highT    thawed            4       0.0808         79.9        keV
   mdl.Abundanc thawed            1            0            5           
   mdl.redshift frozen          0.1        1e-10           10           
   mdl.norm     thawed            1            0        1e+24

ATTRIBUTES

The attributes for this object are:

Attribute	Definition
slope	The power-law index of the emissivity function.
lowT	The minimum temperature, in keV.
highT	The maximum temperature, in keV.
Abundanc	The abundance relative to Solar, as set by set_xsabund .
redshift	The redshift of the plasma.
norm	The mass accretion rate (solar mass per year).

References

[1]

XSPEC version

CIAO 4.18 comes with support for version 12.14.0k of the XSPEC models. This can be checked with the following:

% python -c 'from sherpa.astro import xspec;
print(xspec.get_xsversion())'
12.14.0k

Bugs

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