linebroad

Context: models

Synopsis

A one-dimensional line-broadening profile.

Syntax

linebroad

Example

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

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

mdl
   Param        Type          Value          Min          Max      Units
   -----        ----          -----          ---          ---      -----
   mdl.ampl     thawed            1            0  3.40282e+38           
   mdl.rest     thawed         1000  1.17549e-38  3.40282e+38           
   mdl.vsini    thawed  1.17549e-38  1.17549e-38  3.40282e+38

ATTRIBUTES

The attributes for this object are:

Attribute	Definition
ampl	The amplitude of the line.
rest	The rest wavelength.
vsini	The rotation velocity (v sin(i)), in km/s.

Notes

The model is:

f(lambda) = 2 * ampl * c * sqrt(x) / (pi * rest * vsini)

        x = 1 - ((lambda - rest) * c / (rest * vsini))^2

Bugs

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

/ sherpa4.17 / ahelp / linebroad.html