Table 3
Initial elemental abundances with respect to H nuclei, taken from Aikawa & Herbst (1999).
| Element | Initial abundance |
|---|---|
| H2 | 0.5 |
| He | 9.8×10−2 |
| N | 2.5×10−5 |
| O | 1.8×10−4 |
| C+ | 7.9×10−5 |
| S+ | 9.1×10−8 |
| Si+ | 9.7×10−9 |
| Fe+ | 2.7×10−9 |
| Na+ | 2.3×10−9 |
| Mg+ | 1.1×10−8 |
| Cl+ | 2.2×10−10 |
| P+ | 1.0×10−9 |
Notes. We note that S+ abundances are considered significantly higher in, e.g., TMC-1-CP (Fuente et al. 2023). However, the models for FA are rather insensitive to sulfur abundance and we kept Aikawa & Herbst (1999) values for consistency.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.