SimpleAbsoluteMags

zdm.optical.SimpleAbsoluteMags(App, zs)[source]

Convert apparent to absolute magnitudes using the distance modulus only.

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

Parameters:

  • App (float or np.ndarray) – apparent magnitude(s) m_r.

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

Returns:

absolute 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 (NApp, Nz) if both are arrays (computed via np.outer).

Return type:

AbsoluteMags