Open Access
Table 2
Comparison of the observed column densities (in cm−2) between the TMC-1 dark cloud and the L1544 prestellar core.
| TMC-1 | L1544 | |
|---|---|---|
| CN | (2.9 ± 0.7) × 1014 | 1.2 × 1014 |
| Crutcher et al. (1984) | (Hily-Blant et al. 2008) | |
| C3N | 8.2 × 1012 | (1.6 ± 0.1) × 1012 |
| Guélin et al. (1998) | This paper | |
| CNCN | 9 × 1011 | (6.0–6.6) × 1011 |
| Agúndez et al. (2018) | This paper | |
| NCCNH+ | (8.6 ± 4.4) × 1010 | (1.2–1.9) × 1010 |
| Agúndez et al. (2015) | This paper | |
| H2CN | 1.5 × 1011 | (3–6) × 1011 |
| Ohishi et al. (1994) | This paper | |
| CH3CN | 5 × 1012 | (5–8.9) × 1011 |
| Minh et al. (1993) | This paper | |
| CH2CN | (2–10) × 1013 | (0.28–24.6) × 1012 |
| Irvine et al. (1988) | Vastel et al. (2015b) | |
| HCN | 2.5 × 1014 | (2.7–4.4) × 1014 |
| Hirota et al. (1998) | Quénard et al. (2017a) | |
| HNC | 4.2 × 1014 | (2–4) × 1014 |
| Hirota et al. (1998) | Quénard et al. (2017a) | |
| HC3N | (1.6 ± 0.1) × 1014 | (8.0 ± 0.4) × 1013 |
| Takano et al. (1998) | Quénard et al. (2017a) | |
| Hily-Blant et al. (2018) | ||
| HNC3 | (3.8 ± 0.6) × 1011 | (0.75–2) × 1011 |
| Kawaguchi et al. (1992a) | Vastel et al. (2018a) | |
| HCCNC | (2.9 ± 0.2) × 1012 | (0.85–2.2) × 1012 |
| Kawaguchi et al. (1992b) | Vastel et al. (2018a) | |
| HC3NH+ | (1.0 ± 0.2) × 1012 | (1–2) × 1011 |
| Kawaguchi et al. (1994) | Quénard et al. (2017a) | |
| HCNH+ | 1.9 × 1013 | (2 ± 0.2) × 1013 |
| Schilke et al. (1991) | Quénard et al. (2017a) | |
| C2 H3 CN | 3 × 1013 | (4.0 ± 0.5) × 1012 |
| Turner et al. (1999) | This paper | |
| C2 N | not detected | ≤2 × 1012 |
| C4 N | not detected | ≤1014 |
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