Free Access
Table 3
List of bottleneck reactions for molecule formation with their temperature barrier or endothermicity and the corresponding velocity of the J-type shock that is able to provide this temperature computed using Eq. (10).
| Reaction | Temperature barrier | Velocity |
|
|
||
| O+H2 → OH+ H | 2980 K | 7.5 km s-1 |
| C++ H2 → CH++ H | 4640 K | 9.4 km s-1 |
| S+ H2 → SH+ H | 9620 K | 13.5 km s-1 |
| S++ H2 → SH++ H | 9860 K | 13.6 km s-1 |
| C+ H2 → CH+ H | 14 100 K | 16.3 km s-1 |
| Si++ H2 → SiH++ H | 14 310 K | 16.4 km s-1 |
| N+ H2 → NH+ H | 14 600 K | 16.6 km s-1 |
| H2 dissociation energy | 52 000 K | 31.3 km s-1 |
Notes. N+ + H2 has little or no barrier: 168 K.
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.