galpy.util.coords.pupv_to_vRvz¶
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galpy.util.coords.
pupv_to_vRvz
(pu, pv, u, v, delta=1.0, oblate=False)[source]¶ NAME:
pupv_to_vRvzPURPOSE:
calculate cylindrical vR and vz from momenta in prolate or oblate confocal u and v coordinates for a given focal length deltaINPUT:
pu - u momentum
pv - v momentum
u - u coordinate
v - v coordinate
delta= focus
oblate= (False) if True, compute oblate confocal coordinates instead of prolate
OUTPUT:
(vR,vz)HISTORY:
2017-12-04 - Written - Bovy (UofT)