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The Helium content and age of the Hyades: Constraints from five binary systems and Hipparcos parallaxes
We compare the accurate empirical mass-luminosity (M-L) relation based on five Hyades binary systems to predictions of stellar models calculated with various input parameters (helium, metallicity,Expand
Li depletion in solar analogues with exoplanets - Extending the sample
Aims. We want to study the effects of the formation of planets and planetary systems on the atmospheric Li abundance of planet host stars. Methods. In this work we present new determinations ofExpand
New and updated stellar parameters for 90 transit hosts - The effect of the surface gravity
Context. Precise stellar parameters are crucial in exoplanet research for correctly determining the planetary parameters. For stars hosting a transiting planet, determining the planetary mass andExpand
A homogeneous spectroscopic analysis of host stars of transiting planets
Context. The analysis of transiting extra-solar planets provides an enormous amount of information about the formation and evolution of planetary systems. A precise knowledge of the host stars isExpand
HR diagram and asteroseismic analysis of models for β Hydri
A detailed review of the models for the star β Hydri is done by adjusting the evolutionary sequences to the most recent bolometric, spectroscopic and astrometric data. The dependence of the solutionExpand
Analysis of 70 Ophiuchi AB including seismic constraints
Context. The analysis of solar-like oscillations for stars belonging to a binary system provides a unique opportunity to probe the internal stellar structure and to test our knowledge of stellarExpand
Higher depletion of lithium in planet host stars: no age and mass effect
Recent observational work by Israelian et al. has shown that sun-like planet host stars in the temperature range 5700 K < Teff < 5850 K have lithium abundances that are significantly lower than thoseExpand
A calibration of the 85 Peg binary system
We have calibrated the initial abundances, age and mixing-length parameters of the visual binary system 85 Pegasi. We obtain an age $t_{\rm 85\,Peg}=9\,345\pm500$ Myr, masses $m_{\rmExpand