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Fig. 11


SiO, H2S, CH3OH, and 13CH3OH line profiles (in brightness temperature, TB, scale) observed towards the A2 hot core with the SMA. The dashed lines denote the systemic velocity (+111 km s-1). Several high-excitation lines due to typical tracers of hot-core chemistry (methyl formate, acetone, vinyl cyanide, cyanoacetilene) have also been detected (see Table 4).

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