galpy.df.impulse_deltav_plummer_curvedstream

galpy.df.impulse_deltav_plummer_curvedstream(v, x, b, w, x0, v0, GM, rs)[source]

Calculate the delta velocity to due an encounter with a Plummer sphere in the impulse approximation; allows for arbitrary velocity vectors, and arbitrary position along the stream

Parameters:

  • v (numpy.ndarray) – velocity of the stream (nstar,3)

  • x (numpy.ndarray) – position along the stream (nstar,3)

  • b (float) – impact parameter

  • w (numpy.ndarray) – velocity of the Plummer sphere (3)

  • x0 (numpy.ndarray) – point of closest approach

  • v0 (numpy.ndarray) – velocity of point of closest approach

  • GM (float) – mass of the Plummer sphere (in natural units)

  • rs (float) – size of the Plummer sphere

Returns:

velocity kick deltav (nstar,3)

Return type:

numpy.ndarray

Notes

  • 2015-05-04 - Written based on above - Sanders (Cambridge)