H, He, C, & N - Equilibrium and Time-Dependent Ion Fractions, Z=2
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![](http://wise-obs.tau.ac.il/~orlyg/cooling/jpgs/f6a.jpg)
Ion fractions versus gas temperature. Each row displays results for a
different element. Left hand panels are for collisional
ionization equilibrium (CIE). Right hand panels are for
non-equilibrium isochoric and isobaric cooling for Z=2
times solar metallicity gas. Dark curves are
for isochoric cooling. Light curves are for isobaric cooling.
Panels show H, He, C, and N.
Constructed: June 2006, Orly Gnat