### Voigt profile

(mathematical shape that models spectral lines)

The **Voigt profile** is a model shape of spectral lines,
i.e., a model **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.

Voigt-function approximations have been developed since convolutions are
a computational challenge. With today's computing power,
the approximations still may be useful for cases where such a
model's calculation must be done many times,
or for back-of-the-envelope estimates.

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

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

**Referenced by pages:**

convolution

line shape function

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