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Fig. 21

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Left: MIRI-MRS 5 μm continuum image of the IRAS 18089-1732. The four compact sources are marked by green stars. The 0.7″ aperture used to extract the MIRI-MRS spectrum of the brightest mid-infrared source is indicated by a green circle. A scale bar of 5000 au is shown in the top and the angular resolution at 5 μm is shown in the bottom-left corner. Black contours are the ALMA 3 mm continuum emission taken from Gieser et al. (2023a) with contour steps at 5, 10, 20, 40, 80, 160, 320×σcontcont=0.057 mJy beam-1). Right: MIRI-MRS spectrum of IRAS 18089-1732. The main absorption features are annotated in the figure. Gas-phase lines are not labeled, except in the case of C2H2 and HCN at 13.7 and 14.0 μm. The cyan region between 7 and 9 μm is the spectral window analyzed in this work. Because of the low S/N in the deep silicate absorption, the data between 8.9 and 10 μm are binned by a factor of five.

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