Fig. 8
Comparison between the TK(HCN/HNC) gas kinetictemperatures predicted by our empirical method and the observed dust temperatures in different environments and surveys: (a) Orion ISF (this work), (b) Orion B (Pety et al. 2017), and (c) MALT90 sample (Foster et al. 2011, 2013; Jackson et al. 2013; Guzmán et al. 2015). We indicate the direct TK = Tdust (dashed line) and TK = Tdust ± 5 (dotted lines) correlations in all panels. The optimal temperature range for the application of our method, between ~[10 and 40] K, is highlighted in grey in all panels.
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