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Table 10

Column densities for HNCO, CH3CHO, CH3OCH3 using excitation temperatures from Table 7.

Species Bobs/Bemiss NGC 7538 IRS9 W3 IRS5 AFGL490
N (cm-2) N (cm-2) N (cm-2)

HNCOext 5′′/5′′ 4.0 ± 1.3 × 1013 1.8 ± 0.3 × 1013 6.0 ± 2.2 × 1012
HNCOcomp 5′′/2′′ 1.1 ± 0.3 × 1014 1.4 ± 0.6 × 1014 <4 × 1013
CH3OCH3 5′′/2′′ 3.3 ± 1.0 × 1014 9.7 ± 4 × 1013 4.5 ± 1.9 × 1014
CH3CHO 5′′/5′′ 3.1 ± 0.4 × 1013 < 1.1 × 1013 <1.3 × 1013

Notes. Bobs refers to the beam size of the telescope used to obtain the molecular lines (5′′ for IRAM and 2′′ for SMA) and Bemiss to the beam size from where the line emission is assumed to be coming from.

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