Table 5.
Resulting parameters of ε Ori based on a compromise among interferometry, spectroscopy, and SED.
| Parameter | Value | Uncertainty | Unit | Note |
|---|---|---|---|---|
| m | 28.42 | 2.0 | M⊙ | fitted |
| Prot | 4.27 | ![]() |
d | fitted |
| i | 45 | 20 | deg | fitted |
| Ω | 301.6 | 30 | deg | fitted |
| d | 384 | 8 | pc | fixed |
| Teff | 24985 | 1000 | K | fixed |
| log g | 3.011 | 0.1 | cgs | fixed |
| β | 1.0 | 0.1 | 1 | fixed |
| γ | 25.0 | 0.9 | km s−1 | derived |
| γLSR | 8.2 | 0.7 | km s−1 | derived |
| Requiv | 27.36 | 1.5 | R⊙ | derived |
| Rpole | 22.29 | 1.2 | R⊙ | derived |
| Requ | 33.61 | 1.8 | R⊙ | derived |
| θequiv | 0.667 | 0.035 | mas | derived |
| θpole | 0.540 | 0.064 | mas | derived |
| θequ | 0.814 | 0.073 | mas | derived |
| L | 271 000 | 38 000 | L⊙ | derived |
| v sin i | 220 | ![]() |
km s−1 | derived |
| v | 326 | ![]() |
km s−1 | derived |
| f | 1.47 | 0.35 | rad/d | derived |
| Fobs | 57.8 ⋅ 10−9 | 4 ⋅ 10−9 | W m−2 | derived |
Notes. m denotes the mass; Prot, the rotation period; i, the inclination of the stellar rotation axis with respect to the sky; Ω, the longitude of the ascending node of the star (i.e. equator); d, the distance; Teff, the effective temperature; log g, the logarithm of surface gravity; β, bolometric gravity brightening exponent; γ, the systemic velocity; γLSR, the systemic velocity with respect to the local standard of rest; Requiv, the equivalent radius; Rpole, the pole radius; Requ, the equatorial radius; θequiv, the equivalent angular diameter; θpole, the polar angular diameter; θequ, the equatorial angular diameter; L, the luminosity; vrot sin i, the projected rotation velocity; vrot, the rotation velocity; and f, the rotation frequency.
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