Last modified: December 2018

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

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:

slope

The power-law index of the emissivity function.

lowT

The minimum temperature, in keV.

highT

The maxmimum 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

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
xsmkcflow