Image Details
Caption: Figure 11.
ISM constraints from the FSL ratios predicted by CLOUDY for PDRs with hydrogen column densities NH/[cm−2] = 1023 (top panel) and NH/[cm−2] = 1024 (lower panel). The observed ratio constraints from the aperture-integrated fluxes are plotted in solid lines, and the ±1σ values in the shaded areas of the same color.
© 2022. The Author(s). Published by the American Astronomical Society.