galpy.orbit.Orbit.TrTp

Orbit.TrTp(pot=None, **kwargs)

Calculate the ratio between the radial and azimuthal period Tr/Tphi*pi.

Parameters:

• pot (Potential or list of Potential instances, optional) – Gravitational potential. Default is the gravitational field used for the orbit integration.

• type ({'staeckel', 'adiabatic', 'isochroneApprox', 'spherical'}, optional) – Type of actionAngle module to use. Default is ‘staeckel’.

• kwargs (+actionAngle module setup)

Returns:

Ratio between the radial and azimuthal period Tr/Tphi*pi

Return type:

float, numpy.ndarray or Quantity [*input_shape]

Notes

• 2019-02-27 - Written - Bovy (UofT)

See also

galpy.actionAngle.actionAngleStaeckel, galpy.actionAngle.actionAngleAdiabatic, galpy.actionAngle.actionAngleIsochroneApprox, galpy.actionAngle.actionAngleSpherical