Spherical potentials¶

class galpy.potential.SphericalPotential.SphericalPotential(amp=1.0, ro=None, vo=None, amp_units=None)[source]¶

Base class for spherical potentials.

Implement a specific spherical density distribution with this form by inheriting from this class and defining functions:

_revaluate(self,r,t=0.): the potential as a function of r and time;
_rforce(self,r,t=0.): the radial force as a function of r and time;
_r2deriv(self,r,t=0.): the second radial derivative of the potential as a function of r and time;
_rdens(self,r,t=0.): the density as a function of r and time (if not implemented, calculated using the Poisson equation).

__init__(amp=1.0, ro=None, vo=None, amp_units=None)[source]¶

Initialize a spherical potential.

Parameters:

amp (float, optional) – Amplitude to be applied to the potential (default: 1).
ro (float or Quantity, optional) – Distance scale for translation into internal units (default from configuration file).
vo (float or Quantity, optional) – Velocity scale for translation into internal units (default from configuration file).
amp_units (str, optional) – Type of units that amp should have if it has units (‘mass’, ‘velocity2’, ‘density’).

Notes