Table 1 Solar radiation acceleration and photoionization lifetime of each atom at 1Â au
From: The relation between the surface composition anomaly and distribution of the exosphere of Mercury
Component | Solar radiation acceleration at 1 au (m s−2) | Photoionization lifetime @1 au (s) | Exosphere–surface correlation on mercury |
|---|---|---|---|
Na | 2.5 × 10–2 | 1.9 × 105 | Weak? |
K | 2.1 × 10–4 | 4.3 × 104 | Weak? |
Mg | 1.9 × 10–3 | 2.1 × 106 | Strong |
Ca | 1.3 × 10–2 | 1.4 × 104 | Weak |
O* | 2.5 × 10–6 | 2.0 × 106 | Strong? |
S* | 4.4 × 10–6 | 4.2 × 105 | Strong? |