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Table A.1.

Representative line ratios within our galaxy sample

Line ratio Whole sample NGC 3351 NGC 3627 NGC 4321
16% 50% 84% 16% 50% 84% 16% 50% 84% 16% 50% 84%
CO(2–1)/CO(1–0) 0.682 0.781 0.912 0.802 0.912 0.976 0.723 0.789 0.838 0.636 0.701 0.766
HCN(1–0)/CO(2–1) 0.055 0.074 0.108 0.095 0.106 0.119 0.040 0.057 0.067 0.064 0.075 0.098
HCO+(1–0)/CO(2–1) 0.044 0.054 0.064 0.054 0.063 0.067 0.041 0.045 0.053 0.047 0.055 0.063
HCN(3–2)/CO(2–1) 0.006 0.012 0.019 0.011 0.015 0.017 0.005 0.012 0.023 0.006 0.009 0.022
HCO+(3–2)/CO(2–1) 0.006 0.009 0.014 0.009 0.011 0.014 0.007 0.010 0.020 0.005 0.007 0.011
HCN(3–2)/HCN(1–0) 0.099 0.143 0.250 0.105 0.141 0.156 0.115 0.205 0.340 0.089 0.121 0.214
HCO+(3–2)/HCO+(1–0) 0.122 0.175 0.258 0.140 0.180 0.233 0.156 0.222 0.371 0.105 0.137 0.186
HCN(1–0)/HCO+(1–0) 1.186 1.401 1.761 1.587 1.746 1.936 0.971 1.234 1.337 1.234 1.406 1.681
HCN(3–2)/HCO+(3–2) 0.872 1.164 1.746 0.993 1.218 1.789 0.677 1.109 1.293 0.909 1.249 2.040

Notes. For each line ratio indicated in the leftmost column, we show the 16th, 50th, and 84th percentiles of values measured on a pixel-by-pixel basis in the whole sample of galaxies and in each galaxy separately. In all cases, only pixels where S/N≥5 for all the lines are considered.

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