MiyamotoNagaiPotential

class gala.potential.MiyamotoNagaiPotential(m, a, b, units)

Bases: gala.potential.CPotentialBase

Miyamoto-Nagai potential for a flattened mass distribution.

\[\Phi(R,z) = -\frac{G M}{\sqrt{R^2 + (a + \sqrt{z^2 + b^2})^2}}\]

See: http://adsabs.harvard.edu/abs/1975PASJ...27..533M

Parameters:

m : numeric

Mass.

a : numeric

Scale length.

b : numeric

Scare height.

units : UnitSystem (optional)

Set of non-reducable units that specify (at minimum) the length, mass, time, and angle units.