Fig. 4.
Likelihood corner plots for the parameters in our LVG model. Internal panels give the two-dimensional likelihoods of density, temperature, and [CO]/[C] abundance. Top right panels: give their one-dimensional marginalized likelihoods. Contour levels enclose the 95, 68, and 38% most likely regions of each parameter space. A green dot indicates the best-fit model shown in Fig. 3.
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