galpy.util.coords.spher_to_cyl_vec

galpy.util.coords.spher_to_cyl_vec(vr, vT, vtheta, theta)[source]

NAME:

spher_to_cyl_vec

PURPOSE:

transform vectors from spherical polar to cylindrical coordinates. vtheta is positive from pole towards equator, theta is 0 at pole

INPUT:

vr - Galactocentric spherical radial velocity

vT - Galactocentric spherical azimuthal velocity

vtheta - Galactocentric spherical polar velocity

theta - Galactocentric spherical polar angle

OUTPUT:

vR,vT,vz

HISTORY:

2020-07-01 - Written - James Lane (UofT)