galpy.df.streamdf.meanangledAngle¶

streamdf.meanangledAngle(dangle, smallest=False)[source]¶

Calculate the mean perpendicular angle at a given angle.

Parameters:

dangle (float) – Angle offset along the stream.
smallest (bool, optional) – Calculate for smallest eigenvalue direction rather than for middle. Default is False.

Returns:

Mean perpendicular angle.

Return type:

float or Quantity

Notes

2013-12-06 - Written - Bovy (IAS)