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Fig. 12
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Plot of NGC 7023 spectra in the wavelength regime around 4.3 μm. Left: 12CO2 ice absorption at ~4.26 μm is detected in the MOL, DF3, and DF2 regions. Additionally, there is a weak detection of 13CO2 ice absorption at ~4.39 μm in the MOL and DF3 regions. Right: estimate of the optical depth in the ice absorption bands.
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