Open Access
Table 3
NH3 X-ray average astrophysical yields in molecules per incident photon at 23 K.
| Attenuation | NH3 | H2O(1) |
|---|---|---|
| Source spectrum | 1.3±0.7 × 10−2 | 2.3±1.2 × 10−3 |
| NH = 1021 cm2 | 1.1±0.6 × 10−2 | 2.5±1.3 × 10−3 |
| NH = 1022 cm2 | 4.8±2.4 × 10−3 | 1.2±0.6 × 10−3 |
| NH = 1023 cm2 | 5.9±3.0 × 10−4 | 1.2±0.6 × 10−4 |
| NH = 1024 cm2 | 7.7±3.9 × 10−5 | 1.2±2.5 × 10−5 |
Notes. Values derived using the TW Hya X-ray spectrum from Nomura et al. (2007) calculated for different H column densities. The corresponding yields for water at 15 K are given for comparison. (1) Dupuy et al. (2018).
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.