get_spiral_slice

whampy.get_spiral_slice(survey, track=None, filename=None, brange=None, lrange=None, interpolate=True, wrap_at_180=False, vel_width=None, return_track=False)

Returns SkySurvey object isolated to velocity ranges corresponding to specified spiral arm

Parameters:

survey: ‘whampy.skySurvey’

input skySurvey

track: ‘np.ndarray’, ‘str’, optional, must be keyword

if ‘numpy array’, lbv_RBD track data if ‘str’, name of spiral arm from Reid et al. (2016)

filename: ‘str’, optional, must be keyword

filename of track file to read in using whampy.lbvTracks.get_lbv_track

brange: ‘list’, ‘u.Quantity’

min,max latitude to restrict data to Default of +/- 40 deg

lrange: ‘list’, ‘u.Quantity’

min,max longitude to restrict data to Default of full track extent

interpolate: ‘bool’, optional, must be keyword

if True, interpolates velocity to coordinate of pointings if False, … do nothing … for now

Future: slices have velocities set by track

wrap_at_180: `bool`, optional, must be keyword

if True, wraps longitude angles at 180d use if mapping accross Galactic Center

vel_width: `number`, `u.Quantity`, optional, must be keyword

velocity width to isolate in km/s

return_track: `bool`, optional, must be keyword

if True, will also return the spiral arm track as the second element of a tuple