1999/07/30 by E. Lastennet, D. Valls‐Gabaud, D. Valls-Gabaud +7
Engineering · Physics and Astronomy · #Astronomical Observations and Instrumentation #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #FOS: Physical sciences #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9907443
4 pages, to be published in "Stellar clusters and associations: Convection, Rotation, and Dynamos", Sicily, ed. R. Pallavicini, ASP Conf. Ser
arxiv created 1999/07/30 · openalex publication_date 1999/07/30 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Three independent sets of stellar theoretical models are tested with well-detached systems of the Hyades open cluster: 51 Tau, V818 Tau, and θ2 Tau. The choice of these objects is discussed and a statistical method is described and applied to the colour-magnitude diagram (CMD) of the selected stars, giving rise to contour levels in the metallicity-age plane. The effects of the Hipparcos parallaxes on these confidence regions, with influence on both age and metallicity, are studied for the V818 Tau system through a comparison with very accurate but older orbital parallaxes. Finally, theoretical simultaneous age-metallicity estimates are given for the three binaries and compared with observational constraints.