Table 7. Solar radiation flux enhancement as function of wavelength normalized to the present solar flux value during the first 500 Myr after the young Sun arrived at the ZAMS (Ribas et al., 2005; Güdel, 2007).
Solar age [Gyr] | t b.p. [Gyr] | X-ray [1–20 A] | SXR [20–100 A] | EUV [100–920 A] | FUV [920–1180 A] | Lyman-α [1200–1300 A] | UV [1300–1700 A] |
|---|---|---|---|---|---|---|---|
0.7 | 3.9 | 37 | 11 | 8.6 | 5 | 3.9 | — |
0.65 | 3.95 | 43 | 12 | 9.4 | 5.3 | 4.1 | 5.8 |
0.6 | 4.0 | 50 | 13 | 10 | 5.7 | 4.3 | — |
0.55 | 4.05 | 59 | 15 | 11 | 6.1 | 4.6 | — |
0.5 | 4.1 | 71 | 17 | 13 | 6.6 | 4.9 | — |
0.45 | 4.15 | 87 | 19 | 14 | 7.2 | 5.3 | — |
0.4 | 4.2 | 109 | 22 | 17 | 8 | 5.8 | — |
0.35 | 4.25 | 141 | 26 | 19 | 9 | 6.4 | — |
0.3 | 4.3 | 189 | 32 | 23 | 10 | 7.1 | 10.6 |
0.25 | 4.35 | 268 | 40 | 28 | 12 | 8.1 | — |
0.2 | 4.4 | 412 | 54 | 37 | 14 | 9.6 | — |
0.15 | 4.45 | 715 | 77 | 51 | 18 | 11.8 | — |
0.1 | 4.5 | 1558 | 129 | 82 | 26 | 15.8 | 40.5 |