galpy.df.streamdf.find_closest_trackpointLB¶

streamdf.find_closest_trackpointLB(l, b, D, vlos, pmll, pmbb, interp=True, usev=False)[source]

NAME:

find_closest_trackpointLB
PURPOSE:
find the closest point on the stream track to a given point in (l,b,…) coordinates

INPUT:

l,b,D,vlos,pmll,pmbb- coordinates in (deg,deg,kpc,km/s,mas/yr,mas/yr)

interp= (True) if True, return the closest index on the interpolated track

usev= (False) if True, also use the velocity components (default is to only use the positions)

OUTPUT:

index of closest track point on the interpolated or not-interpolated track

HISTORY:

2013-12-17- Written - Bovy (IAS)