VLTI/VINCI diameter constraints on the evolutionary status of delta Eri, xi Hya, eta Boo.

Frederic Thévenin (1) , Pierre Kervella (2) , Bernard Pichon (1) , Pierre Morel (1) , E. Di Folco (3) , Yveline Lebreton (4)

1 CASSIOPEE - Laboratoire de Cosmologie, Astrophysique Stellaire & Solaire, de Planétologie et de Mécanique des Fluides
2 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
3 ESO - European Southern Observatory
4 GEPI - Galaxies, Etoiles, Physique, Instrumentation

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.

Mots clés: Stellar characteristics and properties; stellar structure and evolution; stellar masses; stellar radii

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]

Frederic Thévenin, Pierre Kervella, Bernard Pichon, Pierre Morel, E. Di Folco, et al.. VLTI/VINCI diameter constraints on the evolutionary status of delta Eri, xi Hya, eta Boo.. Astronomy and Astrophysics - A&A, 2005, 436 (1), pp.253. ⟨10.1051/0004-6361:20042075⟩. ⟨hal-00003919⟩