Table 3
Parameters and uncertainties estimated from a Levenberg-Marquardt fit of our model to the VLTI/AMBER φdiff observed on studied stars, and compared with what we found in the literature.
| Previously studied stars | ||
|
|
||
| Parameters | Achernar | |
|
|
||
| Comparison of best fit values those from literature | ||
|
|
||
| Best-fit parameter | In this paper | In the literature |
|
|
||
| Equatorial radius Req | 11.2 ± 0.5 R⊙ | 11.6 ± 0.6R⊙a |
| Equatorial rotation velocity Veq | 295 ± 10 km s-1 | 298 ± 9 km s-1a |
| Rotation-axis inclination angle i | 100.0 ± 2.5° | 101.5 ± 5.2°a |
| Rotation-axis position angle PArot | 35.4 ± 1.4° | 34.9 ± 1.6°a |
|
|
||
| χ 2 | 2.3003 | |
|
|
||
| Fixed parameter | Value | |
|
|
||
| Distance d | 44.1 pca | |
| Mass M | 6.1 M⊙a | |
Surface mean effective temperature
 |
15 000 Ka | |
| Gravity-darkening coefficient β | 0.20a | |
|
|
||
| Derived parameter | Value | |
|
|
||
| Equatorial angular diameter ⌀eq | 2.38 ± 0.10 mas | |
| Equatorial-to-polar radii Req/Rp | 1.42 ± 0.06 | |
| Veqsini | 290 ± 10 km s-1 | |
| V eq / V crit | 0.94 ± 0.03 | |
| Polar effective temperature Tpol | 18 728 ± 327 K | |
| Equatorial effective temperature Teq | 11 243 ± 1308 K | |
| Luminosity log L/L⊙ | 3.632 ± 0.044 | |
Reference.
Domiciano de Souza et al. (2012), and references there in.
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