galpy.util.bovy_coords.vxvyvz_to_galcencyl

galpy.util.bovy_coords.vxvyvz_to_galcencyl(vx, vy, vz, X, Y, Z, vsun=[0.0, 1.0, 0.0], galcen=False)

NAME:

vxvyvz_to_galcencyl

PURPOSE:

transform XYZ coordinates (wrt Sun) to cylindrical Galactocentric coordinates for velocities

INPUT:

vx - U

vy - V

vz - W

X - X

Y - Y

Z - Z

vsun - velocity of the sun ndarray[3]

galcen - if True, then X,Y,Z are in cylindrical Galactocentric coordinates

OUTPUT:

vRg, vTg, vZg

HISTORY:

2010-09-24 - Written - Bovy (NYU)