Solid-body rotation wrapper potential

class galpy.potential.SolidBodyRotationWrapperPotential(*args, **kwargs)[source]

Potential wrapper class that implements solid-body rotation around the z-axis. Can be used to make a bar or other perturbation rotate. The potential is rotated by replacing

\[\phi \rightarrow \phi + \Omega \times t + \mathrm{pa}\]

with \(\Omega\) the fixed pattern speed and \(\mathrm{pa}\) the position angle at \(t=0\).

__init__(amp=1.0, pot=None, omega=1.0, pa=0.0, ro=None, vo=None)[source]

Initialize a SolidBodyRotationWrapper Potential.

Parameters:

  • amp (float, optional) – Amplitude to be applied to the potential. Default is 1.0.

  • pot (Potential instance or list thereof) – This potential is made to rotate around the z axis by the wrapper.

  • omega (float or Quantity, optional) – The pattern speed. Default is 1.0.

  • pa (float or Quantity, optional) – The position angle. Default is 0.0.

  • 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).

Notes

  • 2017-08-22 - Started - Bovy (UofT)