galpy.util.coords.XYZ_to_galcencyl¶
- galpy.util.coords.XYZ_to_galcencyl(X, Y, Z, Xsun=1.0, Zsun=0.0, _extra_rot=True)[source]¶
NAME:
XYZ_to_galcencyl
PURPOSE:
transform XYZ coordinates (wrt Sun) to cylindrical Galactocentric coordinates
INPUT:
X - X
Y - Y
Z - Z
Xsun - cylindrical distance to the GC
Zsun - Sun’s height above the midplane
_extra_rot= (True) if True, perform an extra tiny rotation to align the Galactocentric coordinate frame with astropy’s definition
OUTPUT:
R,phi,z
HISTORY:
2010-09-24 - Written - Bovy (NYU)