Hernquist potential¶
-
class
galpy.potential.
HernquistPotential
(amp=1.0, a=1.0, normalize=False, ro=None, vo=None)¶ Class that implements the Hernquist potential
\[\rho(r) = \frac{\mathrm{amp}}{4\,\pi\,a^3}\,\frac{1}{(r/a)\,(1+r/a)^{3}}\]-
__init__
(amp=1.0, a=1.0, normalize=False, ro=None, vo=None)¶ NAME:
__init__PURPOSE:
Initialize a Hernquist potentialINPUT:
amp - amplitude to be applied to the potential (default: 1); can be a Quantity with units of mass or Gxmass
a - scale radius (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:
2010-07-09 - Written - Bovy (NYU)
-