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Fig. 1

image

Left panel: CH3COOH integrated emission map at 219 016 MHz. The first contour and the level step are at 5σ (where 1σ = 9.3 × 10-3 Jy beam-1 km s-1). Middle panel: aGg(CH2OH)2 integrated emission map at 231 127 MHz. The first contour and the level step are at 5σ (where 1σ = 1.4 × 10-2 Jy beam-1 km s-1). Right panel: gGg(CH2OH)2 integrated emission map at 220 250 MHz. The contour levels are at 4, 4, and 6σ (where 1σ = 1 × 10-2 Jy beam-1 km s-1). A narrow vLSR interval (from 7 to 9 km s-1) has been selected to reduce confusion by nearby lines (see Sect. 3.3 and Appendix C). Positions of the radio source I, the BN object, and the IR source n (see Goddi et al. 2011) are indicated by yellow triangles. The white square indicates the position of the ethylene glycol peak (αJ2000 = 05h35m1447, δJ2000 = 05°223317) by BD15. Finally, the continuum emission at 235 GHz is overlaid in white contours with a level step of 0.2 Jy beam-1 (Paper I).

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