galpy.util.bovy_coords.vRvz_to_pupv¶
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galpy.util.bovy_coords.
vRvz_to_pupv
(vR, vz, R, z, delta=1.0, oblate=False, uv=False)[source]¶ NAME:
vRvz_to_pupvPURPOSE:
calculate momenta in prolate or oblate confocal u and v coordinates from cylindrical velocities vR,vz for a given focal length deltaINPUT:
vR - radial velocity in cylindrical coordinates
vz - vertical velocity in cylindrical coordinates
R - radius
z - height
delta= focus
oblate= (False) if True, compute oblate confocal coordinates instead of prolate
uv= (False) if True, the given R,z are actually u,v
OUTPUT:
(pu,pv)HISTORY:
2017-11-28 - Written - Bovy (UofT)