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Fig. 3


Integrated intensity maps of six species across G35.20, where the contours are the 870 μm continuum with the same levels as Fig. 1. Panel a) shows the CH3OCHO ν = 0 emission at 336.086 GHz integrated from 18.5 to 38 km s-1. Panel b) shows the CH3OCHO ν = 1 emission at 348.084 GHz integrated from 26 to 38.5 km s-1. Panel c) shows the H2CS emission at 338.083 GHz integrated from 24.5 to 38.5 km s-1. Panel d) shows ethylene glycol ((CH2OH)2) emission at 335.030 GHz integrated from 25–36.5 km s-1. Panel e) shows CH3CHO ν = 0 emission at 335.318 GHz integrated from 22.5 to 37 km s-1. Panel f) shows CH3CHO ν = 2 emission at 349.752 GHz integrated from 24 to 29 km s-1. It can clearly be seen between panels a) and b) and between e) and f) that vibrationally excited states have a much smaller emitting region. It is also clear in panel d) that (CH2OH)2 is only seen in core A.

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