PDR models of Kaufman et al. 2006, ApJ, 644, 283. The PDR model details and a guide for using the contour plots are available.
![[C II] 158 µm Intensity](cpwebthumb.gif)
![[O I] 145 µm / [O I] 63 µm Intensity Ratio](oioiwebthumb.gif)
![[O I] 145 µm / [C II] 158 µm Intensity Ratio](o145ciiwebthumb.gif)
![[O I] 63 µm / [C II] 158 µm Intensity Ratio](oicpwebthumb.gif)
![([O I] 63 µm + [C II] 158 µm)/I<sub>FIR</sub>](firwebthumb.gif)
