galpy.util.coords.Rz_to_coshucosv¶
- galpy.util.coords.Rz_to_coshucosv(R, z, delta=1.0, oblate=False)[source]¶
NAME:
Rz_to_coshucosv
PURPOSE:
calculate prolate confocal cosh(u) and cos(v) coordinates from R,z, and delta
INPUT:
R - radius
z - height
delta= focus
oblate= (False) if True, compute oblate confocal coordinates instead of prolate
OUTPUT:
(cosh(u),cos(v))
HISTORY:
2012-11-27 - Written - Bovy (IAS)
2017-10-11 - Added oblate coordinates - Bovy (UofT)