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Table 9

Rotational temperatures and column densities for CH3OH, CH3CN, and CH3CCH derived from the rotational diagrams presented in Fig. 6.

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

CH3OH (IRAM) 5′′/ 5′′ 25 ± 2 9 ± 1 × 1014 63 ± 6 3.2 ± 0.4 × 1014 25 ± 2 2.4 ± 0.4 × 1014
CH3OH (SMA) 2′′/ 2′′ 81 ± 16 2.5 ± 0.4 × 1015 166 ± 85 2.4 ± 0.5 × 1015 102 ± 67 1.2 ± 0.5 × 1015
CH3CN 5′′/ 2′′ 111 ± 20 7 ± 2 × 1013 92 ± 23 2.4 ± 0.8 × 1013 164 ± 78 3.6 ± 1.2 × 1013
CH3CCH 5′′/ 5′′ 47 ± 5 1.2 ± 0.3 × 1015 58 ± 8 7 ± 2 × 1014 41 ± 7 4.2 ± 1.7 × 1014

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

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