Fig. 8
Map of the [CCH]/[CH3OH] abundance ratio as derived via the LTE analysis described in Sect. 6.4. The sources MMS5, MMS2, and CSO3 are represented by white stars. The beam size is the white circle at the bottom right of the figure. We note that the error bar in the derived [CCH]/[CH3OH] abundance ratio is about 4 (see Table C.3 of Appendix C).
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