Isothermal disk potential

class galpy.potential.IsothermalDiskPotential(amp=1.0, sigma=0.1, ro=None, vo=None)

Class representing the one-dimensional self-gravitating isothermal disk

\[\rho(x) = \mathrm{amp}\,\mathrm{sech}^2\left(\frac{x}{2H}\right)\]

where the scale height \(H^2 = \sigma^2/[8\pi G \,\mathrm{amp}]\). The parameter to setup the disk is the velocity dispersion \(\sigma\).

__init__(amp=1.0, sigma=0.1, ro=None, vo=None)

NAME:

__init__

PURPOSE:

Initialize an IsothermalDiskPotential

INPUT:

amp - an overall amplitude

sigma - velocity dispersion (can be a Quantity)

OUTPUT:

instance

HISTORY:

2018-04-11 - Written - Bovy (UofT)