Fig. 7.
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HCN(1–0)/FIR ratio as a function of FIR luminosity. The pink dashed horizontal lines correspond to star-formation efficiency parameter ϵff = 0.3, 0.5, 1.0. and 2.0% (Onus et al. 2018); the purple line indicates the HCN/FIR ratio from Bigiel et al. (2016). We find ϵff = 1% in J1202, other individual upper limits and the stacked spectra imply ϵff ≥ 2%.
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