skypy.utils.random.triaxial_axis_ratio¶
- skypy.utils.random.triaxial_axis_ratio(zeta, xi, size=None)[source] [edit on github]¶
axis ratio of a randomly projected triaxial ellipsoid
Given the two axis ratios
1 >= zeta >= xi
of a randomly oriented triaxial ellipsoid, computes the axis ratioq
of the projection.- Parameters:
- zetaarray_like
Axis ratio of intermediate and major axis.
- xiarray_like
Axis ratio of minor and major axis.
- sizetuple of int or None
Size of the random draw. If
None
is given, size is inferred from other inputs.
- Returns:
- qarray_like
Axis ratio of the randomly projected ellipsoid.
Notes
See equations (11) and (12) in [1] for details.
References
[1]Binney J., 1985, MNRAS, 212, 767. doi:10.1093/mnras/212.4.767