Table 1
Abundances of the targeted nitrile species relative to HCN as resulting from our analysis of ROSINA/DFMS data from 67P and other astrophysical environments.
| Environment | NCCN/HCN | HC3N/HCN | CH3CN/HCN |
|---|---|---|---|
| 67P (full mission) | 0.00078 ± 0.00030 | 0.0044 ± 0.0009 | 0.083 ± 0.013 |
| 67P (1.24–1.74 au) | 0.0018 ± 0.0009 | 0.0046 ± 0.0008 | 0.12 ± 0.02 |
| 67P (1.5–1.6 au) (a) | – | 0.0029 ± 0.0019 | 0.042 ± 0.027 |
| Hale-Bopp (0.9-1.2 au) (b) | – | 0.079 | 0.082 |
| C/2014 Q2 (c) | – | 0.022 ± 0.006 | 0.17 ± 0.05 |
| Disk average (d) | – | 0.057 ± 0.023 | 0.055 ± 0.022 |
| IRAS 16293-2422 B (e) | – | 0.0036 ± 0.001 | 0.8 ± 0.2 |
Notes.Total error margins include statistical errors for the averages calculated as standard deviation divided by the square root of the number of actual measurements in the averaged time period (excluding time-interpolated data points). (a) Values from Rubin et al. (2019). (b) Values from Bockelée-Morvan et al. (2000). (c)Values from Biver et al. (2015). (d)Values from Bergner et al. (2018); 40% error margins estimated from the error bars in their Fig. 12. The average over the sample of five disks was calculated considering rotational temperatures of 30 K (CH3 CN/HCN) and 70 K (HC3 N/HCN), respectively, not taking into account CH3CN relative abundance upper limits given for two of the five disks. (e) Values from Drozdovskaya et al. (2019).
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