4 papers · 1 filter
Lithium abundances in exoplanet-hosts stars
M. Castro, S. Vauclair, O. Richard +1
Exoplanet-host stars (EHS) are known to present surface chemical abundances different from those of stars without any detected planet (NEHS). EHS are, on the average, overmetallic…
Abundances determination of A, Am and F stars in the Pleiades and Coma Berenices clusters
M. Gebran, R. Monier, O. Richard
Abundances of 18 chemical elements have been derived for 27 A/Am and 16 F stars members of the Pleiades and Coma Berenices open clusters. We have specifically computed, with the Mo…
Of Variability, or its Absence, in HgMn Stars
S. Turcotte, O. Richard
Current models and observations of variability in HgMn stars disagree. We present here the models that argue for pulsating HgMn stars with properties similar to those of Slowly Pul…
Consistent Solar Models Including the Li and He Constraints
Sylvie Vauclair, Olivier Richard
Improvements induced by helioseismology show that microscopic diffusion cannot be neglected in solar models. Helium and metal diffusion is now generally introduced in the computati…