Fig. 10
Gas-to-dust ratio map of ρ Oph A calculated as the H2 column density from C18O relative to the H2 column density from dust. The gas column data are based on the C18O(3 − 2) map of Liseau et al. (2010) and the dust continuum data are from Motte et al. (1998). The gas column data have not been corrected for opacity.
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