as-500/hw20/text.mth

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Homework 20, Day 22, Due Nov 9
Solve HW17 for the case of non-equilibrium time dependent ionization.
Plot H+/H and H0/H as a function of redshift, for 100 < z < 1e5. Include the equilibrium solution from HW17 or HW18 on the same plot, but with different line styles.
Find the recombination and ionization timescales. Make a plot showing these timescales together with the age of the universe.