Table 5.
Comparison of the fundamental parameters of Altair derived by Monnier et al. (2007) and from our work where we use X = 0.739 from Asplund et al. (2005).
| Parameters | Monnier et al. (2007) | This work |
|---|---|---|
| i (°) | 57.2 ± 1.9 | 50.65 ± 1.23 |
| PA (°) | 298.2 ± 0.8 | 301.13 ± 0.34 |
| M (M⊙) | 1.791 | 1.86 ± 0.03 |
| Tpole (K) | 8450 ± 140 | 8621 |
| Teq (K) | 6860 ± 150 | 6780 |
| Rpole (R⊙) | 1.634 ± 0.011 | 1.565 ± 0.014 |
| Req (R⊙) | 2.029 ± 0.007 | 2.008 ± 0.006 |
| veq (km s−1) | 285.5 ± 6 | 313 |
| v sin i (km s−1) | 240 | 242 |
| Ω (Ωk) | 0.695 ± 0.009 | 0.744 ± 0.010 |
| Z | – | 0.019 |
| [M/H] | −0.2 | 0.19 |
| Xc | – | 0.71 |
| ε | 0.195 ± 0.002 | 0.220 ± 0.003 |
| β | 0.190 ± 0.012 | 0.185 |
Notes. The last column shows the parameters of the ESTER model which best reproduce all interferometric, spectroscopic and seismic data. The values in boldface are inputs of the model, and were obtained via fitting of the data, while the others are output of ESTER.
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