Table 5
Molecular column densities and fractional abundances.
| Source | N(o − H2D+) | x(o − H2D+) | N(C17O) | x(C17O) | N(N2H+) | x(N2H+) | N(N2D+) | x(N2D+) |
|---|---|---|---|---|---|---|---|---|
| [1012 cm−2] | [10−11] | [1014 cm−2] | [10−8] | [1013 cm−2] | [10−10] | [1012 cm−2] | [10−10] | |
| IRAS 05399-0121 | <1.4 | <2.3 | 10.8 ± 1.1 | 2.7 ± 0.4 | 5.5 ± 0.8 | 10.7 ± 2.0 | 4.7 ± 0.3 | 1.1 ± 0.1 |
| SMM 1 | 4.8 ± 0.8 | 11.5 ± 2.3 | 17.8 ± 1.0 | 7.4 ± 0.9 | 0.8 ± 0.1 | 3.1 ± 0.6 | 3.8 ± 0.4 | 1.6 ± 0.2 |
| SMM 3 | 6.4 ± 1.0 | 5.9 ± 1.1 | 4.0 ± 0.6(a) | 0.5 ± 0.1(a) | 1.9 ± 0.2 | 1.6 ± 0.3 | 2.3 ± 0.5 | 0.3 ± 0.1 |
| IRAS 05405-0117 | <1.5 | <9.7 | 3.2 ± 0.3 | 1.0 ± 0.2 | 0.5 ± 0.1 | 3.6 ± 0.6 | 0.3 ± 0.2 | 0.2 ± 0.1 |
| SMM 6 (b) | 8.4 ± 0.7 | 30.2 ± 5.6 | 2.0 ± 0.3 | 0.9 ± 0.2 | 0.6 ± 0.1 | 2.4 ± 0.4 | 3.1 ± 0.1 | 1.3 ± 0.2 |
| … | … | 3.0 ± 0.2 | 1.3 ± 0.2 | 1.0 ± 0.1 | 3.8 ± 0.7 | 3.5 ± 0.6 | 1.5 ± 0.3 | |
| SMM 7 | 4.8 ± 1.4 | 11.5 ± 3.7 | 16.0 ± 1.4 | 5.9 ± 0.9 | 2.2 ± 0.9 | 6.8 ± 2.9 | <3.9(c) | <1.5 |
Notes. (a) The column density and fractional abundance of the C18O isotopologue derived from observations towards the Spitzer 24 μm peak position (2.′′2 offset from the SABOCA peak) are (7.8 ± 1.0) × 1014 cm−2 and (9.6 ± 1.6) × 10−9, respectively (Miettinen 2016). (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).(c)The N2D+(3−2) line was not detected towards SMM 7 (Miettinen et al. 2012), and hence we estimated the column density upper limit from the 3σ line intensity upper limit and the N2H+(3−2) linewidth divided by the average Δv(N2H+(3−2))∕Δv(N2D+(3−2)) ratio (= 1.26) in our sample. All the quoted upper limits take the uncertainties into account.
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