angular_size¶

skypy.galaxies.morphology.angular_size(physical_size, redshift, cosmology)[source] [edit on github]¶

Angular size of a galaxy. This function transforms physical radius into angular distance, described in [1].

Parameters

physical_sizeastropy.Quantity: Physical radius of galaxies in units of length.
redshiftfloat: Redshifts at which to evaluate the angular diameter distance.
cosmologyastropy.cosmology.Cosmology: Cosmology object providing methods for the evolution history of omega_matter and omega_lambda with redshift.

Returns

angular_sizeastropy.Quantity: Angular distances in units of [rad] for a given radius.

References