### Voigt profile

(mathematical shape that models spectral lines)

The **Voigt profile** is a model shape of spectral lines,
i.e., a model **spectral line profile**.
It is the shape the **Voigt function** is a convolution of two
distribution functions, that model the result of two types of
line broadening together, Doppler broadening
and **pressure broadening**.
(These, and the result, are termed **line broadening functions**,
or **broadening functions** or **BFs**.)
The math offers a means of analyzing a line regarding
the two effects.

Given the challenge of convolutions, approximations have been
developed, now probably most useful for cases where such a model's
calculation must be done many times (or back-of-the-envelope
analysis).

(*spectrography,lines*)
**Further reading:**

http://en.wikipedia.org/wiki/Voigt_profile

**Referenced by pages:**

convolution

line shape function

Index