Astronomy & Astrophysics

All Tables

Table 1: Determination of the transmission correction slope $\gamma$ of the VINCI/VLTI combination as observed on bright stars with two 8-meters telescopes.
Table 2: Calibration observations of $\theta$ Cen and 58 Hya. The expected visibilities given in this table include the bandwidth smearing effect. The resulting interferometric efficiencies assumed for the calibration of the $\alpha$ Cen and $\theta$ Cen observations are given in bold characters, with the corresponding statistical and systematic error bars for each observing session. The calibrated visibilities can be found in Table 3 for $\theta$ Cen, and in Tables 5 and 6 for $\alpha$ Cen A and $\alpha$ Cen B.
Table 3: $\theta$ Cen squared visibilities.
Table 4: Parameters of the primary ( $\theta$ Cen) and secondary (58 Hya) calibrators.
Table 5: $\alpha$ Cen A squared visibilities, expressed in percents.
Table 6: $\alpha$ Cen B squared visibilities.
Table 7: Uniform disk angular diameters of $\alpha$ Cen A and B in the K band derived from the VINCI/VLTI observations.
Table 8: Linear LD/UD conversion factors for $\alpha$ Centauri. The assumed physical parameters to match Claret's (2000) grid are the closest ones to those of Thévenin et al. (2002).
Table 9: Summary of limb-darkened angular diameters from different computation methods. Both methods are based on the Claret (2000) coefficients. The fitting results using the analytical Hestroffer (1997) formula are assumed in the rest of this paper.
Table 10: Parallax values of $\alpha$ Cen from the litterature.
Table 11: Parallax of $\alpha$ Cen from VINCI/VLTI and asteroseismological observations, and the corresponding self-consistent stellar parameters. Linear diameters are taken from the asteroseismology study by Thévenin et al. (2002).