A time history diagnostic plot showing the evolution of oxygen states (top panel) for the collisional ionisation non-equilibrium (CINe isochoric) case starting at T=106 K at t=0 for nH=10-4 cm-3, solar enriched gas. The middle panel shows timescales including the recombination timescales of various oxygen ions (in colour), the cooling timescale, and the dynamical timescale. The bottom shows the temperature history. The CINe cases were the subject of Gnat & Sternberg (2007) who showed recombination timescales in excess of the cooling timescale significantly reduced cooling in the gas and created ionisation lags. This figure is meant to be compared and contrasted with the adjacent four figures here on the website.
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