Table C.1
Formation rates of H2 by electron and ionic catalysis in cm−3 s−1.
| Catalyst | xX | α (cm−3 s−1) | β |  (cm−3) |
|---|---|---|---|---|
| e− | 4.8(−4) | 3.35(−19) | 0.9 | . |
| C+ | 3.55(−4) | 4.88(−21) | − 0.42 | 1.7 |
| Si+ | 3.35(−5) | 3.42(−22) | − 0.12 | 1.4 |
| S+ | 1.86(−5) | 1.51(−25) | 0 | 4.7 |
| H+ | 1.00(−6) | 4.76(−24) | 1.68 | 0.6 |
Notes. Rates for electron and ionic catalysis are parametrized according to Eqs. (C.8) and (C.17), respectively. We note that
is defined in Eq. (C.14) and α
is the H2 formation rate in cm−3s−1 at
TK = 1000 K, assuming a reference abundance of the catalyst of xX. This reference value is the elemental abundance of the corresponding element for X = C, S, Si, and an abundance representative of dust-free wind for H+. The electron abundance corresponds to the one obtained if all atoms with an IP < 13.5eV are ionized. Numbers in parentheses are powers of 10.
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.