HCN emission from translucent gas and UV-illuminated cloud edges revealed by wide-field IRAM 30 m maps of the Orion B GMC - Revisiting its role as a tracer of the dense gas reservoir for star formation

Open Access

Fig. 4

Distribution of ¹²CO, HCN, HCO+, HNC J = 1−0, and [C I] 492 GHz line intensities as a function of A_V. The dashed red lines show the running median (median values of the line intensity within equally spaced log A_V bins). Error bars show the line intensity dispersion. We note that the 5σ error of A_V is ≃0.8 mag. Thus, one cannot trust any trend below this threshold.

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