YusifovKucuk2004B

class gammapy.astro.population.YusifovKucuk2004B(amplitude=1, a=4, b=6.8, **kwargs)

Bases: astropy.modeling.Fittable1DModel

Radial distribution of the surface density of OB stars in the galaxy - Yusifov & Kucuk 2004.

\[f(r) = A \left( \frac{r}{r_{\odot}} \right) ^ a \exp \left[ -b \left( \frac{r}{r_{\odot}} \right) \right]\]

Derived empirically from OB-stars distribution.

Reference: http://adsabs.harvard.edu/abs/2004A%26A...422..545Y (Formula (17))

Parameters:

amplitude : float

See model formula

a : float

See model formula

b : float

See model formula

See also

CaseBattacharya1998, Paczynski1990, YusifovKucuk2004, Lorimer2006, FaucherKaspi2006, Exponential

Attributes Summary

a
amplitude
b
evolved
param_names

Methods Summary

evaluate(r, amplitude, a, b)

One dimensional Yusifov & Kucuk 2004 model function

Attributes Documentation

a

amplitude

b

evolved = False

param_names = ('amplitude', 'a', 'b')

Methods Documentation

static evaluate(r, amplitude, a, b)

One dimensional Yusifov & Kucuk 2004 model function