Table 4
Molecular abundances with respect to H2 toward different targets.
| Name | X(HCNH+) (×10−10) | X(H13CN) (×10−11) | X(HN13C) (×10−11) | X(H13CO+) (×10−11) | X(N2H+) (×10−10) |
|---|---|---|---|---|---|
| (1) | (2) | (3) | (4) | (5) | (6) |
| The Serpens filament | 2.5–10.1 | 1.3–3.8 | 0.9–11.0 | (0.9–6.1) | 0.6–8.6 |
| bolo4 | 5.7 ± 1.4 | 3.6 ± 0.8 | 10.5 ± 0.1 | 3.4 ± 0.4 | 5.8 ± 0.7 |
| bolo12 | 5.7 ± 1.2 | 2.7 ± 0.4 | 7.2 ± 0.8 | 3.8 ± 0.4 | 4.7 ± 0.6 |
| Serpens South | 0.3–5.9 | 0.4–3.7 | 0.9–7.4 | 0.7–4.7 | 0.5–5.2 |
| KAM280 | 2.6 ± 0.4 | 0.7 ± 0.1 | 2.0 ± 0.2 | 0.8 ± 0.1 | 2.9 ± 0.3 |
| KAM281 | 2.0 ± 0.4 | 0.8 ± 0.1 | 2.1 ± 0.2 | 0.8 ± 0.1 | 3.7 ± 0.4 |
| KAM283 | 1.5 ± 0.3 | 2.0 ± 0.2 | 3.5 ± 0.4 | 2.2 ± 0.2 | 2.7 ± 0.4 |
| KAM294 | 1.5 ± 0.2 | 2.7 ± 0.3 | 3.7 ± 0.4 | 2.2 ± 0.2 | 3.3 ± 0.4 |
| KAM299 | 0.31 ± 0.04 | 2.6 ± 0.3 | 2.3 ± 0.2 | 2.3 ± 0.2 | 3.1 ± 0.4 |
| TMC1 | 19.0 ± 3.0 | 17.8 ± 2.1 | 41.7 ± 6.2 | 14.4 ± 0.3 | 2.8 ± 0.2 |
| L1544 | 3.0 ± 0.3 | 13.6 ± 1.7 | 31.4 ± 5.7 | 2.3 ± 0.7 | 3.1 ± 0.7 |
Notes. (1) Source name. (2) HCNH+ fractional abundance relative to H2. (3) H13CN fractional abundance relative to H2. (4) HN13C fractional abundance relative to H2. (5) H13CO+ fractional abundance relative to H2. (6) N2H+ fractional abundance relative to H2. The uncertainties of molecular abundances are estimated by assuming 10% uncertainties in the dust-based H2 column densities (Könyves et al. 2015). The molecular abundances in TMC1 are taken from Pratap et al. (1997) and Schilke et al. (1991), while the molecular abundances in L1544 are based on Caselli et al. (2002a,b), Quénard et al. (2017), and Hirota et al. (1998).
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