angular_diameter_distance

astropy.cosmology.funcs.angular_diameter_distance(z, cosmo=None)

Angular diameter distance in Mpc at a given redshift.

This gives the proper (sometimes called ‘physical’) transverse distance corresponding to an angle of 1 radian for an object at redshift z.

Parameters :

z : array_like

Input redshifts.

Returns :

angdist : ndarray, or float if input scalar

Angular diameter distance at each input redshift.