Last modified: December 2019

URL: https://cxc.cfa.harvard.edu/sherpa/ahelp/xsvcph.html
AHELP for CIAO 4.12 Sherpa v1

xsvcph

Context: models

Synopsis

The XSPEC vcph model: Cooling + heating model for cool core clusters

Syntax

xsvcph

The xsvcph model is an additive model component.

Description

The model is described at [1] .


Example

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

Create a component of the xsvcph 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          0.1        1e-06           50           
   mdl.switch   frozen            1            0            2           
   mdl.norm     thawed            1            0        1e+24           

ATTRIBUTES

The attributes for this object are:

peakT

The peak temperature, in keV.

He, C, N, O, Ne, Na, Mg, Al, Si, S, Ar, Ca, Fe, Ni

The abundance of the element, with respect to Solar.

Redshift

The redshift.

switch

If 0 calculate, if 1 interpolate, if 2 use AtomDB data.

norm

The mass accretion rate, in solar mass per year.

New in CIAO 4.12

The xsvcph model (added in XSPEC 12.10.1) is new in CIAO 4.12

References

XSPEC version

CIAO 4.12 comes with support for version 12.10.1n of the XSPEC models. This can be checked with the following:

% python -c 'from sherpa.astro import xspec;
print(xspec.get_xsversion())'
12.10.1n

Bugs

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