galpy.potential.ttensor¶

galpy.potential.ttensor(Pot, R, z, phi=0.0, t=0.0, eigenval=False)[source]¶

Calculate the tidal tensor Tij=-d(Psi)(dxidxj)

Parameters:

Pot (Potential instance or list of such instances) – Potential instance or list of such instances
R (float or Quantity) – Galactocentric radius
z (float or Quantity) – height
phi (float or Quantity, optional) – azimuth (default: 0.0)
t (float or Quantity, optional) – time (default: 0.0)
eigenval (bool, optional) – return eigenvalues if true (default: False)

Returns:

Tidal tensor or eigenvalues of the tidal tensor

Return type:

array, shape (3,3) or (3,)

Notes

2018-03-21 - Written - Webb (UofT)