Paczynski1990Velocity

class gammapy.astro.population.Paczynski1990Velocity(amplitude=1, v_0=560, **kwargs)

Bases: astropy.modeling.Fittable1DModel

Distribution by Lyne 1982 and adopted by Paczynski and Faucher.

\[f(v) = A\frac{4}{\pi} \frac{1}{v_{0} \left[1 + (v / v_{0}) ^ 2 \right] ^ 2}\]

Reference: http://adsabs.harvard.edu/abs/1990ApJ...348..485P (Formula (3))

Parameters:

amplitude : float

Value of the integral

v_0 : float

Velocity parameter (km s^-1)

Attributes Summary

amplitude
param_names
v_0

Methods Summary

evaluate(v, amplitude, v_0)

One dimensional Paczynski 1990 velocity model function.

Attributes Documentation

amplitude

param_names = ('amplitude', 'v_0')

v_0

Methods Documentation

static evaluate(v, amplitude, v_0)

One dimensional Paczynski 1990 velocity model function.