SimpleApparentMags

zdm.optical.SimpleApparentMags(Abs, zs)

Convert absolute to apparent magnitudes using the distance modulus only.

Adds 5 * log10(D_L / 10 pc) to the absolute magnitude, where D_L is the luminosity distance in Mpc. No k-correction is applied.

Parameters:

• Abs (float or np.ndarray) – absolute magnitude(s) M_r.

• zs (float or np.ndarray) – redshift(s) of the galaxies.

Returns:

apparent magnitude(s). Scalar if both inputs are

scalar; 1-D array if one input is scalar and one is an array; 2-D array of shape (NAbs, Nz) if both are arrays (computed via np.outer).

Return type:

ApparentMags