galpy.potential.Potential.epifreq
galpy.potential.Potential.lindbladR
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NAME:
flattening
PURPOSE:
calculate the potential flattening, defined as sqrt(|z/R F_R/F_z|)
INPUT:
R - Galactocentric radius z - height
R - Galactocentric radius
z - height
OUTPUT:
HISTORY:
2012-09-13 - Written - Bovy (IAS)