Last modified: December 2018

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

xsbrnei

Context: models

Synopsis

The XSPEC brnei model: velocity-broadened non-equilibrium recombining collisional plasma.

Syntax

xsbrnei

The xsbrnei model is an additive model component.

Description

The model is described at [1] . The set_xsxset and get_xsxset functions are used to set and query the XSPEC XSET parameters, in particular the keyword "NEIVERS".


Example

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

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

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.kT       thawed          0.5       0.0808         79.9        keV
   mdl.kT_init  thawed            1       0.0808         79.9        keV
   mdl.Abundanc frozen            1            0         1000           
   mdl.Tau      thawed        1e+11        1e+08        5e+13     s/cm^3
   mdl.redshift frozen            0       -0.999           10           
   mdl.Velocity frozen            0            0        1e+06       km/s
   mdl.norm     thawed            1            0        1e+24           

ATTRIBUTES

The attributes for this object are:

kT

The temperature of the plasma, in keV.

kT_init

The initial temperature of the plasma, in keV.

Abundanc

The metal abundance of the plasma, as defined by the set_xsabund function.

Tau

The ionization timescale in units of s/cm^3.

Redshift

The redshift of the plasma.

Velocity

Velocity broadening in km/s.

norm

The normalization of the model: see [1] for an explanation of the units.

New in CIAO 4.11

The xsbrnei model (added in XSPEC 12.10.0) is new in CIAO 4.11

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
xsbvrnei, xsbvvrnei