Table 3
Column densities of H2NC and H2CN.
| Source | N(H2NC) (cm−2) | N(H2CN) (cm−2) | H2NC/H2CN | Reference | N(NH3) (cm−2) | Reference |
|---|---|---|---|---|---|---|
| Cold dense clouds | ||||||
| L483 | 1.0 × 1012 | 8.0 × 1011 | 1.25 | (1) | 14× 1014 | (3) |
| B1-b | 1.0 × 1012 | 1.0 × 1012 | 1.00 | (1) | 11.2 × 1014 | (4) |
| TMC-1 CP | <3.2 × 1011 | <4.8 × 1011 | – | (1) | 1.9 × 1014 | (4) |
| L1544 | 3.9 × 1011 | 4.3 × 1011 | 0.91 | (2) | 2.7 × 1014 | (4) |
| L134N | 4.0 × 1011 | 2.5 × 1011 | 1.60 | (2) | 7.8 × 1014 | (4) |
| TMC-2 | 2.1 × 1011 | 4.1 × 1011 | 0.51 | (2) | 6.1 × 1014 | (4) |
| Lupus-1A | 1.9 × 1011 | 2.8 × 1011 | 0.68 | (2) | 1.1 × 1014 | (5) |
| L1489 | 1.7 × 1011 | 2.1 × 1011 | 0.81 | (2) | 6.3 × 1014 | (4) |
| TMC-1 NH3 | 3.3 × 1011 | <1.2 × 1011 | > 2.7 | (2) | 5.2 × 1014 | (4) |
| L1498 | 1.9 × 1011 | <1.4× 1011 | > 1.4 | (2) | 4.1 × 1014 | (4) |
| L1641N | <3.1 × 1011 | <4.6× 1011 | – | (2) | 11.0 × 1014 | (4) |
| Diffuse-like clouds | ||||||
| PKS 1830-211 | 5.3 × 1011 | 2.0 × 1012 | 0.27 | (1) | (5–10) × 1014 | (6) |
| B0415+379 | <3.1 × 1011 | <5.5 × 1011 | – | (2) | 10.53 × 1012 | (7) |
| B0355+508 | <9.2 × 1010 | <2.0 × 1011 | – | (2) | 2.54 × 1012 | (7) |
References. (1) Cabezas et al. (2021), (2) this work, (3) Anglada et al. (1997), (4) Suzuki et al. (1992), (5) value at position Lup1 C4, ~2 arcmin off from Lupus-1A (Benedettini et al. 2012), (6) Henkel et al. (2008), (7) values at the velocity components VLSR = −0.9 km s−1 for B0415+379 and VLSR = −10.4 km s−1 for B0355+508 (Liszt et al. 2006).
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