xsbvcph

Context: models

Synopsis

The XSPEC bvcph model: Cooling + heating model for cool core clusters.

Syntax

xsbvcph

The xsbvcph model is an additive model component.

Description

The model is described at [1] .

Example

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

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

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.peakT    thawed          2.2          0.1          100        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           50           
   mdl.Velocity frozen            0            0        10000       km/s
   mdl.switch   frozen            2            0            3           
   mdl.norm     thawed            1            0        1e+24

PARAMETERS

The parameters for this function are:

Parameter	Definition
peakT	The peak temperature in keV.
He	The abundance relative to Solar.
C	The abundance relative to Solar.
N	The abundance relative to Solar.
O	The abundance relative to Solar.
Ne	The abundance relative to Solar.
Na	The abundance relative to Solar.
Mg	The abundance relative to Solar.
Al	The abundance relative to Solar.
Si	The abundance relative to Solar.
S	The abundance relative to Solar.
Ar	The abundance relative to Solar.
Ca	The abundance relative to Solar.
Fe	The abundance relative to Solar.
Ni	The abundance relative to Solar.
Redshift	The redshift of the plasma.
Velocity	The gaussian sigma for the velocity broadening (in km/s) which is only used when switch > 1.
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; if 3 then SPEX data. 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/XSmodelCph.html

Changes in CIAO

Added in CIAO 4.17

XSPEC version

CIAO 4.17 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.