Table 2
Simulation scenarios.
| N | FVUV | He/H | Ṁp | A(Hα) | A(Paβ) | A(O I) | Other |
|---|---|---|---|---|---|---|---|
| (erg cm−2 s−1) | (1010 g s−1) | (%) | (%) | (%) | |||
| 1 | 2.0 × 107 | 0.03 | 1100 | 1.50 | 0.71 | – | No metals |
| 2 | 2.0 × 107 | 0.03 | 720 | 1.32 | 0.62 | 0.25 | No heating by metals |
| 3 | 2.0 × 107 | 0.03 | 840 | 1.32 | 0.65 | 0.26 | No Mg, Fe |
| 4 | 2.0 × 107 | 0.03 | 570 | 1.35 | 0.60 | 0.37 | No H I− |
| 5 | 2.0 × 107 | 0.03 | 400 | 1.1 | 0.46 | 0.27 | Fiducial |
| 6 | 2.0 × 107 | 0.075 | 71 | 0.82 | 0.35 | 0.23 | |
| 7 | 2.0 × 107 | 0.1 | 20 | 0.69 | 0.31 | 0.21 | |
| 8 | 2.0 × 107 | 0.01 | 700 | 1.3 | 0.52 | 0.31 | |
| 9 | 1.0 × 107 | 0.03 | 5 | 0.43 | 0.34 | 0.24 | |
| 10 | 1.5 × 107 | 0.03 | 125 | 0.9 | 0.4 | 0.26 | |
| 11 | 3.0 × 107 | 0.03 | 1150 | 1.45 | 0.65 | 0.27 | |
| 12 | 1.7 × 107 | 0.01 | 370 | 1.13 | 0.46 | 0.29 | |
| 13 | 4.0 × 107 | 0.1 | 210 | 0.98 | 0.46 | 0.22 | |
| 14 | 2.0 × 107 | 0.03 | 280 | 1.03 | 0.43 | 0.25 | Tbase = 4000 K |
| 15 | 2.0 × 107 | 0.03 | 935 | 1.4 | 0.55 | 0.34 | Tbase = 5000 K |
| 1.06 ± 0.1(a) | 0.5 ± 0.2(b) | 0.21 ± 0.05(c) |
Notes. The list of simulation scenarios for KELT-9 b, with the corresponding parameter sets, and the calculated absorptions. Columns from left to right: the number of the set; assumed stellar VUV flux at 1 AU in erg cm−2 s−1; assumed helium abundance; calculated mass loss rate of the planet in units of 1010 g s−1; calculated absorption in the lines of Hα (656.3 mn), Paβ (1282 mn), and O I (777.4 nm), averaged over the interval ± 10 km s−1 around the line center. The last column contains additional assumed parameters, if used. The bottom row shows the measured absorption values from Yan & Henning (2018)(a), Sánchez-López et al. (2022)(b), and Borsa et al. (2022)(c).
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