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Fig. 8


Diagnostic two-phase gas ratios as a function of the observed [ CI ] (21)/(10) line flux ratio. The left panel shows the behavior of the ‘warm/cold/ratio of total CO line luminosities, taken from Kamenetzky et al. (2014) versus the [ CI ] line ratio from this paper. The center panel shows the corresponding “warm/cold” ratio of molecular gas masses. The right panel shows the fraction of the 12COJ = 2−1 flux that is ascribed to “dense” gas, based on the results published by Israel (2009b, and references therein). All three quantities increase in favor of “warm” and “dense” with increasing [ CI ] line flux ratio.

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