galpy.orbit.Orbit.vbb¶
-
Orbit.
vbb
(*args, **kwargs)[source]¶ NAME:
vbbPURPOSE:
return velocity in Galactic latitude (km/s)INPUT:
t - (optional) time at which to get vbb (can be Quantity)
- obs=[X,Y,Z,vx,vy,vz] - (optional) position and velocity of observer
- in the Galactocentric frame (in kpc and km/s) (default=[8.0,0.,0.,0.,220.,0.]; entries can be Quantity) OR Orbit object that corresponds to the orbit of the observer Y is ignored and always assumed to be zero
ro= (Object-wide default) physical scale for distances to use to convert (can be Quantity)
vo= (Object-wide default) physical scale for velocities to use to convert (can be Quantity)
OUTPUT:
v_b(t) in km/s [*input_shape]HISTORY:
2019-02-28 - Written - Bovy (UofT)