Table 2: Observational constraints for $\alpha$ Cen A and B. References: (1) Söderhjelm (1999), (2) Pourbaix et al. (2002), (3) this paper, (4) derived from the other observational measurements (see text), (5) Kervella et al. (2003), (6) Bouchy & Carrier (2002) and (7) Carrier & Bourban (2003).
$\alpha$ Cen A $\alpha$ Cen B References

$\pi$ [mas]
$747.1 \pm 1.2$ (1)

$M/M_{\odot}$ $1.105 \pm 0.0070$ $0.934 \pm 0.0061$ (2)

V [mag] $-0.003 \pm 0.006$ $1.333 \pm 0.014$ (3)

$L/L_{\odot}$ $1.522 \pm 0.030$ $0.503 \pm 0.020$ (4)

$T_{{\rm eff}}$ [K] $5810 \pm 50$ $5260 \pm 50$ (3)

[Fe/H $]_{{\rm s}}$ $0.22 \pm 0.05$ $0.24 \pm 0.05$ (3)

$\theta$ [mas] $8.511 \pm 0.020$ $6.001 \pm 0.034$ (5)

$R/R_{\odot}$ $1.224 \pm 0.003$ $0.863 \pm 0.005$ (5)

$\Delta \nu_{0}$ [ $\mu$ Hz] $105.5 \pm 0.1$ $161.1 \pm 0.1$ (6), (7)

$\delta \nu_{02}$ [ $\mu$ Hz] $5.6 \pm 0.7$ $8.7 \pm 0.8$ (6), (7)

**Table 2:** Observational constraints for $\alpha$ Cen A and B. References: (1) Söderhjelm (1999), (2) Pourbaix et al. (2002), (3) this paper, (4) derived from the other observational measurements (see text), (5) Kervella et al. (2003), (6) Bouchy & Carrier (2002) and (7) Carrier & Bourban (2003).
	$\alpha$ Cen A	$\alpha$ Cen B	References
$\pi$ [mas]	$747.1 \pm 1.2$	(1)
$M/M_{\odot}$	$1.105 \pm 0.0070$	$0.934 \pm 0.0061$	(2)
V [mag]	$-0.003 \pm 0.006$	$1.333 \pm 0.014$	(3)
$L/L_{\odot}$	$1.522 \pm 0.030$	$0.503 \pm 0.020$	(4)
$T_{{\rm eff}}$ [K]	$5810 \pm 50$	$5260 \pm 50$	(3)
[Fe/H $]_{{\rm s}}$	$0.22 \pm 0.05$	$0.24 \pm 0.05$	(3)
$\theta$ [mas]	$8.511 \pm 0.020$	$6.001 \pm 0.034$	(5)
$R/R_{\odot}$	$1.224 \pm 0.003$	$0.863 \pm 0.005$	(5)
$\Delta \nu_{0}$ [ $\mu$ Hz]	$105.5 \pm 0.1$	$161.1 \pm 0.1$	(6), (7)
$\delta \nu_{02}$ [ $\mu$ Hz]	$5.6 \pm 0.7$	$8.7 \pm 0.8$	(6), (7)

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