Table 3
Production rates in 67P in November-December 2021.
| UT date (mm/dd.dd) | Molecule | rh (au) | Production rate (×1025 molec s−1) | Lines(a) |
|---|---|---|---|---|
| 11/12.09 | HCN | 1.217 | 0.90 ± 0.08 | 1 |
| 11/13.05 | HCN | 1.218 | 1.01 ± 0.14 | 1 |
| 11/14.22 | HCN | 1.220 | 0.85 ± 0.10 | 2 |
| 11/15.07 | HCN | 1.222 | 1.06 ± 0.09 | 1 |
| 11/16.12 | HCN | 1.223 | 1.20 ± 0.05 | 1 |
| 12/12.35 | HCN | 1.311 | 1.11 ± 0.24 | 1 |
| 12/13.36 | HCN | 1.315 | 1.02 ± 0.11 | 1 |
| 11/17.00 | H2O | 1.225 | 1190 ± 440 | 1 |
| 11/12.30 | CH3OH | 1.217 | 11.1 ± 2.7 | (6) |
| 11/13.20 | CH3OH | 1.218 | 14.5 ± 3.2 | (9) |
| 11/14.15 | CH3OH | 1.220 | 36.7 ± 6.6 | (10) |
| 11/15.30 | CH3OH | 1.222 | 11.4 ± 1.4 | (14) |
| 11/16.20 | CH3OH | 1.223 | 17.4 ± 1.4 | (17) |
| 11/12.30 | CS | 1.217 | 0.42 ± 0.22 | 1 |
| 11/13.26 | CS | 1.218 | 0.74 ± 0.15 | 1 |
| 11/15.25 | CS | 1.222 | 0.64 ± 0.12 | 2 |
| 11/16.15 | CS | 1.223 | 0.65 ± 0.12 | 2 |
| 12–16 November 2021 average | ||||
| 11/12.0–16.2 | HCN | 1.221 | 1.10 ± 0.04 | 2 |
| 11/12.3–16.3 | CH3CN | 1.222 | 0.200 ± 0.038 | (8) |
| 11/12.2–16.4 | HNCO | 1.221 | 0.54 ± 0.15 | (10) |
| 11/12.2–16.2 | CS | 1.221 | 0.64 ± 0.07 | 2 |
| CSd | 1.05 ± 0.11(b) | 2 | ||
| 11/13.1–16.3 | H2S | 1.221 | 1.93 ± 0.35 | 1 |
| 11/12.0–16.4 | CH3OH | 1.221 | 14.4 ± 0.7 | 18 |
| 11/13.1–16.4 | H2CO | 1.222 | 0.73 ± 0.14 | 4 |
| H2COd | 2.93 ± 0.56(c) | 4 | ||
| 11/12.0–16.2 | HNC | 1.221 | <0.075 | (1) |
| HNCd | <0.110(d) | (1) | ||
| 11/12.1–16.6 | HC3N | 1.221 | <0.23 | (8) |
| 11/12.1–16.3 | NH2CHO | 1.221 | <0.39 | (11) |
| 11/12.2–16.4 | HCOOH | 1.222 | <2.5 | (9) |
| 11/14.0–16.0 | CO | 1.222 | <55 | (1) |
| 11/12.2–16.4 | SOnuc | 1.222 | <0.86 | (5) |
| SOd | <2.6(e) | (5) | ||
| 11/12.0–16.4 | SO2 | 1.222 | <2.7 | (9) |
| 11/12.0–16.4 | OCS | 1.222 | <6.5 | (6) |
| 11/12.0–16.4 | H2CS | 1.222 | <1.2 | (5) |
| 11/12.0–16.4 | CH3CHO | 1.222 | <1.7 | (32) |
| 12–13 December 2021 average | ||||
| 12/12.3–13.4 | HCN | 1.313 | 1.1 ± 0.1 | 1 |
| 12/12.3–13.4 | CH3OH | 1.313 | 26 ± 10 | (12) |
Notes. (a) Number of lines used for the determination of Q, which are in parentheses when individual lines are not clearly detected. (b)CSd: assuming that CS comes from a more distributed source than the usually assumed photo-dissociation of CS2, using a parent scale length of 3000 km instead of 650 km (Roth et al. 2021; Biver et al. 2022). (c)H2COd: we assume that H2CO is produced in the coma with a Haser parent-scale length of 8000 km. (d)HNCd: we assume that HNC is produced in the coma with a Haser parent-scale length of 1000 km (Cordiner et al. 2017). (e)Assuming a parent-scale length of 4500 km (Ld(SO2)) for the case where SO is a daughter (SOd) species and not coming from the nucleus (SOnuc).
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