Table 2
CRIRES+ total production rates (Q) and mixing ratios with respect to water 
in C/2021 A1.
| Date (dd.mm.yy) | Molecule | Q [1026 molecules s−1] |  [%] |
|---|---|---|---|
| 29.12.2021 | H2O | 1213 ± 107 | 100 |
| CH3OH | 6.52 ± 1.46 | 0.54 ± 0.12 | |
| NH3 | <7.3 | <0.6 | |
| H2CO | 3.46 ± 0.75 | 0.29 ± 0.06 | |
| C2H | 1.98 ± 0.79 | 0.16 ± 0.07 | |
| CH4 | 3.24 ± 0.34 | 0.27 ± 0.03 | |
 |
6.75 ± 0.77 | 0.56 ± 0.06 | |
| 01.01.2022 | H2O | 12 590 ± 409 | 100 |
| CH3OH | 47.2 ± 4.2 | 0.38 ± 0.03 | |
| NH3 | <93.1 | <0.74 | |
| H2CO | 30 ± 3 | 0.24 ± 0.02 | |
| C2H6 | 23.6 ± 1.5 | 0.19 ± 0.01 | |
| CH4 | 28 ± 9 | 0.222 ± 0.007 | |
| HCl | 3.93 ± 0.37 | 0.031 ± 0.003 | |
 |
47.0 ± 0.6 | 0.37 ± 0.01 | |
| 03.01.22 | H2O | 7204 ± 341 | 100 |
| CH3OH | 30 ± 5 | 0.42 ± 0.07 | |
| NH3 | <42 | <0.6 | |
| H2CO | 17.8 ± 2.2 | 0.25 ± 0.03 | |
| C2H6 | 15 ± 3 | 0.21 ± 0.03 | |
| CH4 | 19 ± 1 | 0.26 ± 0.01 | |
| HCl | 1.75 ± 0.57 | 0.024 ± 0.008 | |
 |
44.6 ± 0.9 | 0.62 ± 0.01 | |
Notes. Production rates are calculated for a rotational temperature of (87 ± 11) K, (102 ± 2) K, and (109 ± 2) K, and a growth factor of (1.83 ± 0.15), (1.87 ± 0.05), and (2.43 ± 0.10), for the first, second, and third observing nights, respectively. Upper limits are given at 3σ level (i.e., 99% confidence level).(†) A secondary species; production rates for NH2 were verified with the Planetary Spectrum Generator (PSG, Villanueva et al. 2018), which incorporate a daughter photo-dissociation model together with the NH2 g-factors (assuming NH3 as the parent species).
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