Table 1: Observable characteristics of the stars and best model reproducing them. The subscripts " $_{\rm ini}$ '' and " $_{\rm surf}$ '' respectively refer to initial values and current surface quantities. Note that the presented errors of VLTI/VINCI angular diameters are the statistical ones followed by the systematical ones. Note also that $D/D_\odot$ is equal to $R/R_\odot$ .
$\delta$ Eri $\xi$ Hya $\eta$ Boo

V $3.51 \pm 0.02$ $3.54 \pm 0.01$ $2.68 \pm 0.01$

$\rm BC$ $-0.24 \pm 0.01$ $-0.26 \pm 0.01$ $-0.06 \pm 0.01$

$T_{\rm eff} \rm (K)$ $5074 \pm 60$ $5010 \pm 100$ $6050 \pm 150$

$L/L_\odot$ $3.19 \pm 0.06$ $60.7 \pm 4.1$ $8.95 \pm 0.20$

$\rm [Fe/H]_{surf}$ $0.13 \pm 0.08$ $-0.04 \pm 0.12$ $0.24 \pm 0.07$

$\log g$ $3.77 \pm 0.16$ $2.93 \pm 0.30$ $3.66 \pm 0.20$

$\rm\theta_{LD}(mas)$ $2.394 \pm 0.014$ $2.386 \pm 0.009$ $2.200 \pm 0.027$

$\pm 0.025$ $\pm 0.019$ $\pm 0.016$

$D/D_\odot$ $2.33 \pm 0.03$ $10.3 \pm 0.3$ $2.68 \pm 0.05$

$\rm\pi (mas)$ $110.58 \pm 0.88$ $25.23 \pm 0.83$ $88.17 \pm 0.75$

$\rm\Delta \nu_0 (\mu Hz)$ $43.8 \pm 0.3$ 7.1 $40.47 \pm 0.05$

$\delta$ Eri $\delta$ Eri $\xi$ Hya $\xi$ Hya $\eta$ Boo $\eta$ Boo

diffusion no diffusion diffusion no diffusion diffusion no diffusion

$M / M_\odot$ 1.215 1.215 2.65 2.65 1.70 1.70

Age of the ZAMS (Myr) 20.14 20.06 2.724 2.719 12.68 12.67

Age (from ZAMS) (Myr) 6194. 6196. 509.52 505.34 2738.5 2355.

$Y_{\rm ini}$ 0.28 0.28 0.275 0.275 0.260 0.260

$[Z/X]_{\rm ini}$ 0.148 0.148 0.00 0.00 0.367 0.367

$T_{\rm eff} \rm (K)$ 5055. 5066. 5037. 5034. 6050. 6090.

$L/L_\odot$ 3.176 3.230 61.23 61.0 8.944 8.978

$R/R_\odot$ 2.328 2.337 10.30 10.30 2.728 2.697

$\log g$ 3.788 3.785 2.835 2.832 3.796 3.806

$Y_{\rm surf}$ 0.266 0.28 0.274 0.275 0.228 0.260

$[Z/X]_{\rm surf}$ 0.123 0.148 0.00 0.00 0.303 0.367

$M_{\rm CZ} (M_{\star})$ 0.729 0.727 0.608 0.596 0.9994 0.9994

$R_{\rm CZ} (R_{\star})$ 0.475 0.475 0.422 0.417 0.8388 0.8505

$\rm\Delta \nu_0 (\mu Hz)$ 45.27 44.91 7.23 7.28 41.91 42.47

**Table 1:** Observable characteristics of the stars and best model reproducing them. The subscripts " $_{\rm ini}$ '' and " $_{\rm surf}$ '' respectively refer to initial values and current surface quantities. Note that the presented errors of VLTI/VINCI angular diameters are the statistical ones followed by the systematical ones. Note also that $D/D_\odot$ is equal to $R/R_\odot$ .
	$\delta$ Eri		$\xi$ Hya		$\eta$ Boo
V	$3.51 \pm 0.02$		$3.54 \pm 0.01$		$2.68 \pm 0.01$
$\rm BC$	$-0.24 \pm 0.01$		$-0.26 \pm 0.01$		$-0.06 \pm 0.01$
$T_{\rm eff} \rm (K)$	$5074 \pm 60$		$5010 \pm 100$		$6050 \pm 150$
$L/L_\odot$	$3.19 \pm 0.06$		$60.7 \pm 4.1$		$8.95 \pm 0.20$
$\rm [Fe/H]_{surf}$	$0.13 \pm 0.08$		$-0.04 \pm 0.12$		$0.24 \pm 0.07$
$\log g$	$3.77 \pm 0.16$		$2.93 \pm 0.30$		$3.66 \pm 0.20$
$\rm\theta_{LD}(mas)$	$2.394 \pm 0.014$		$2.386 \pm 0.009$		$2.200 \pm 0.027$
	$\pm 0.025$		$\pm 0.019$		$\pm 0.016$
$D/D_\odot$	$2.33 \pm 0.03$		$10.3 \pm 0.3$		$2.68 \pm 0.05$
$\rm\pi (mas)$	$110.58 \pm 0.88$		$25.23 \pm 0.83$		$88.17 \pm 0.75$
$\rm\Delta \nu_0 (\mu Hz)$	$43.8 \pm 0.3$		7.1		$40.47 \pm 0.05$
	$\delta$ Eri	$\delta$ Eri	$\xi$ Hya	$\xi$ Hya	$\eta$ Boo	$\eta$ Boo
	diffusion	no diffusion	diffusion	no diffusion	diffusion	no diffusion
$M / M_\odot$	1.215	1.215	2.65	2.65	1.70	1.70
Age of the ZAMS (Myr)	20.14	20.06	2.724	2.719	12.68	12.67
Age (from ZAMS) (Myr)	6194.	6196.	509.52	505.34	2738.5	2355.
$Y_{\rm ini}$	0.28	0.28	0.275	0.275	0.260	0.260
$[Z/X]_{\rm ini}$	0.148	0.148	0.00	0.00	0.367	0.367
$T_{\rm eff} \rm (K)$	5055.	5066.	5037.	5034.	6050.	6090.
$L/L_\odot$	3.176	3.230	61.23	61.0	8.944	8.978
$R/R_\odot$	2.328	2.337	10.30	10.30	2.728	2.697
$\log g$	3.788	3.785	2.835	2.832	3.796	3.806
$Y_{\rm surf}$	0.266	0.28	0.274	0.275	0.228	0.260
$[Z/X]_{\rm surf}$	0.123	0.148	0.00	0.00	0.303	0.367
$M_{\rm CZ} (M_{\star})$	0.729	0.727	0.608	0.596	0.9994	0.9994
$R_{\rm CZ} (R_{\star})$	0.475	0.475	0.422	0.417	0.8388	0.8505
$\rm\Delta \nu_0 (\mu Hz)$	45.27	44.91	7.23	7.28	41.91	42.47

Source LaTeX | All tables | In the text

	1 Introduction
	2 Global characteristics of the stars
	3 Diameter interferometric measurements
	4 Models and results
	5 Concluding remarks
	References