Table 6
Volume-averaged H2 number density, CO depletion factor and timescale, and degree of deuteration of the target sources.
| Source | ⟨n(H2)⟩ | fD(CO) | τdep | [N2D+]∕[N2H+] |
|---|---|---|---|---|
| [104 cm−3] | [104 yr] | |||
| IRAS 05399-0121 | 10.2 ± 2.4 | 3.6 ± 0.5 | 5.2 ± 1.2 | 0.09 ± 0.01 |
| SMM 1 | 9.9 ± 1.7 | 1.3 ± 0.2 | 5.7 ± 1.0 | 0.47 ± 0.08 |
| SMM 3 (a) | … | 42.7 ± 7.0 | … | … |
| 19.5 ± 3.9 | 20.8 ± 3.9 | 3.0 ± 0.6 | 0.12 ± 0.03 | |
| IRAS 05405-0117 | 7.1 ± 0.9 | 4.0 ± 0.6 | 8.2 ± 1.1 | 0.05 ± 0.03 |
| SMM 6 (b) | 36.4 ± 11.8 | 11.2 ± 2.0 | 1.6 ± 0.5 | 0.50 ± 0.05 |
| 4.1 ± 0.6 | 7.5 ± 1.0 | 14.3 ± 2.0 | 0.36 ± 0.08 | |
| SMM 7 | 8.9 ± 2.4 | 1.7 ± 0.2 | 7.1 ± 1.9 | <0.24 |
Notes. (a) The CO depletion factor quoted on the first row was derived from the C18O observationstowards the Spitzer 24 μm peak position of the source, which lies 2.′′2 to the north-west of the SABOCA peak (Miettinen 2016), while the values on the second row were derived towards our earlier target position (Miettinen et al. 2012). (b) The values on the first row for SMM 6 refer to the SABOCA 350 μm peak position (Miettinen & Offner 2013b; their source SMM 6a), while those on the second row were derived towards our earlier target position (Miettinen et al. 2012).
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