Central molecular zones in galaxies: Multitransition survey of dense gas tracers HCN, HNC, and HCO+

Open Access

Fig. 10.

Comparison of the J = 3 − 2/J = 1 − 0 HCN ratio as a function of the isotopological ratio ¹²CO/¹³CO (leftmost panel) and FIR/CO (rightmost panel). Solid lines mark ratios of unity. Symbols are as in Fig. 3. Fit parameters are listed in Table 8.

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