Line fluxes for models with constant gas mass (g/ddust). The upper panel shows the flux of the R(7) line from the fundamental asymmetric stretch band at 4.3 μm. The lower panel shows the flux contained in the 15 μm feature. The grey region denotes the range in line fluxes as observed by Salyk et al. (2011b) scale to the distance of AS 205 N. This feature contains the flux from multiple Q-branches with Δv2 = 1. The CO2 flux depends primarily on the outer CO2 abundance and the total g/d ratio and does not strongly depend on the inner CO2 abundances. Only for the very low CO2 absolute abundances in the outer regions is the effect of the inner abundance on the line fluxes visible.
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