Isochrone potential¶
- class galpy.potential.IsochronePotential(amp=1.0, b=1.0, normalize=False, ro=None, vo=None)[source]¶
Class that implements the Isochrone potential
\[\Phi(r) = -\frac{\mathrm{amp}}{b+\sqrt{b^2+r^2}}\]with \(\mathrm{amp} = GM\) the total mass.
- __init__(amp=1.0, b=1.0, normalize=False, ro=None, vo=None)[source]¶
NAME:
__init__
PURPOSE:
initialize an isochrone potential
INPUT:
amp= amplitude to be applied to the potential, the total mass (default: 1); can be a Quantity with units of mass or Gxmass
b= scale radius of the isochrone potential (can be Quantity)
normalize= if True, normalize such that vc(1.,0.)=1., or, if given as a number, such that the force is this fraction of the force necessary to make vc(1.,0.)=1.
ro=, vo= distance and velocity scales for translation into internal units (default from configuration file)
OUTPUT:
(none)
HISTORY:
2013-09-08 - Written - Bovy (IAS)