Table 1.
Column densities at the one beam offset position of IRAS 16293 B from the ALMA-PILS data.
| Molecule | Formula | Ntot† (cm−2) | Tex (K) |
|---|---|---|---|
| Nitrous acid | HONO | (9 ± 5) × 1014 | 100 |
| Nitric oxide‡ | NO | (2.0 ± 0.5) × 1016 | 40–150 |
| Nitrous oxide‡ | N2O | ≥4.0 × 1016 | 25–350 |
| Hydroxylamine‡ | NH2OH | ≤4 × 1014 | [100] |
| Nitrosyl hydride | HNO | ≤ 3 × 1014 | [100] |
| Nitrogen dioxide | NO2 | ≤2 × 1016 | [100] |
| Nitrosyl cation | NO+ | ≤2 × 1014 | [100] |
| Nitric acid | HNO3 | ≤5 × 1014 | [100] |
Notes. All models assume LTE, FWHM of 1 km s−1, peak velocity Vpeak of 2.5 ± 0.2 km s−1, and source size of 
. (†)The uncertainties are 3σ. Upper limits are also 3σ and determined for an assumed Tex = 100 K, indicated with brackets in the table. (‡)Results from Ligterink et al. (2018).
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