Fig. 15
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Comparison between ice abundances with respect to CH3OH ice in IRAS 2A and the comet 67P/G-C (Rubin et al. 2019). Full and hollow circles show the abundances considering 
and 1.3 × 1018 cm−2, respectively. The solid line indicates the 1:1 abundance relation, and the dashed lines indicate a cometary abundance lower and higher by a factor of 5.
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