barak.absorb.calc_DLA_tau¶

barak.absorb.calc_DLA_tau(wa, z=0, logN=20.3, logZ=0, bHI=50, atom=None, verbose=1, highions=1, molecules=False)[source]¶

Create the optical depth due to absorption from a DLA.

The DLA is at z=0. The column density and metallicity can be varied. Solar Abundance ratios are assumed, with most of the atoms in the singly ionised state

Parameters :	wa : array_like Wavelength scale. logZ : float (0) log10 of the metal abundance relative to solar. For example 0 (the default) gives solar abundances, -1 gives 1/10th of solar. verbose : bool (False) Print helpful information
Returns :	tau, ticks : ndarrays, structured array tau at each wavelength and tick positions and names.