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Table 1

Source characteristics and ice abundances.

Source α(2000) δ(2000) d L NH2O X [%] (/NH2O )

kpc 104L 1017 cm-2 CH3OH CH4 NH3 OCN

NGC 7538 IRS9 23:14:01.6 +61:27:20.4 2.7 3.5 70 4.3 ± 0.6 2 ± 0.4 15 ± 2.7 1.7 ± 0.5
W3 IRS5 02:25:40.5 +62:05:51.3 2.0 17 51 <3.3 <1.3 <5.7 <0.23
AFGL490 03:27:38.7 +58:47:01.1 1.4 0.46 6.2 11 ± 4 <2.4 <16 <1.2
W33A 18:14:38.9 –17:52:04.0 3.8 5.3 110 15 ± 5 1.5 ± 0.2 15 ± 4 6.3 ± 1.9
AFGL2591 20:29:24.6 +40:11:19.0 3.3 18 12 14 ± 2 <2.7 <2.3
NGC 7538 IRS1 23:13:45.4 +61:28:12.0 2.4 15 22 <4 1.5 ± 0.5 <17 <0.5
Orion IRc2 05:35:14.3 –05:22:31.6 0.4 1.0 24.5 10 ± 3 2 ± 0.6
G24.78 18:36:12.6 –07:12:11.0 7.7 1.2
G75.78 20:21:44.1 +37:26:40.0 1.9 19
NGC 6334 IRS1 17:20:53.0 –35:47:02.0 1.7 11

Notes. The sources observed in this study are in boldface, the others are from Bisschop et al. (2007).

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