Table 4
Lost hydrogen (in EOH), lost oxygen (in bar) and atmospheric build-up O2 pressure when Proxima b reaches the HZ and at the age of the system.
| H loss (EOH) | O2 loss (bar) | Build-up O2 pressure (bar) | |||||||
| T HZ | T HZ | 4.8 Gyr | T HZ | T HZ | 4.8 Gyr | T HZ | T HZ | 4.8 Gyr | |
| (1.5 S⊕) | (0.9 S⊕) | (1.5 S⊕) | (0.9 S⊕) | (1.5 S⊕) | (0.9 S⊕) | ||||
|
|
|||||||||
| LXUV evol | 0.36–0.42 | 0.76–0.94 | <21 | 47–51 | 110–118 | 207–2385 | 32–41 | 53–92 | <2224 |
| LXUV cst | 0.25–0.29 | 0.55–0.64 | <16 | 21–22 | 48–52 | 176–1193 | 35–41 | 71–92 | <2224 |
Notes. The two values given for each column correspond to the uncertainty coming from the different initial water reservoir (1 ocean to ∞ oceans) and the initial time (t0 = 10 Myr and t0 = 3 Myr).
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