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Table 11

CH3CN, CH3CCH, HNCO, CH3CHO, CH3OCH3 abundances with respect to CH3OH for their respective spatial origin.

Species ratio Spatial origin NGC 7538 IRS9 W3 IRS5 AFGL490
/CH3OH

CH3CN compact 2.8 ± 0.9 × 10-2 1.0 ± 0.4 × 10-2 3.0 ± 1.6 × 10-2
CH3CCH extended 1.3 ± 0.4 2.2 ± 0.7 1.8 ± 0.8
HNCO compact 4.4 ± 1.4 × 10-2 5.8 ± 2.7 × 10-2 <3.4 × 10-2
CH3OCH3 compact 1.3 ± 0.5 × 10-1 4.0 ± 1.8 × 10-2 3.8 ± 2.3 × 10-2
CH3CHO extended 3.4 ± 0.6 × 10-2 <3.5× 10-2 <5.5 × 10-2

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