Fig. 12
Line emitting regions in the reference model. The surrounded areas are responsible for 50% of the vertically emitted line fluxes as annotated. The black dashed contours show the hydrogen nuclei particle density log n⟨ H ⟩(r,z). The yellow dotted contour line shows the upper boundary of the molecular layer where nCO/n⟨ H ⟩ = 10-5.
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