VLTI/VINCI diameter constraints on the evolutionary status of delta Eri,   xi Hya, eta Boo
  Using VLTI/VINCI angular diameter measurements, we constrain the evolutionary status of three asteroseismic targets: the stars $\delta$ Eri, $\xi$ Hya, $\eta$ Boo. Our predictions of the mean large frequency spacing of these stars are in agreement with published observational estimations. Looking without success for a companion of $\delta$ Eri we doubt on its classification as an RS CVn star. 
Frederic Th\'evenin (LCCASSPMF), Pierre Kervella (LESIA), Bernard   Pichon (LCCASSPMF), Pierre Morel (LCCASSPMF), Emmanuel D...