6 papers · 1 filter
Influence of Hipparcos on Hyades age estimates from three binary systems
E. Lastennet, D. Valls-Gabaud, T. Lejeune +1
Three independent sets of stellar theoretical models are tested with well-detached systems of the Hyades open cluster: 51 Tau, V818 Tau, and Tau. The choice of these objects…
Metallicity calibration of theoretical stellar SEDs using UBVRIJHKL photometry of globular clusters
P. Westera, Th. Lejeune, R. Buser
Although stellar SED models are constantly improving and seem to show similar differential tendencies as measured spectra, their absolute properties (eg. absolute flux in different…
Modeling age and metallicity in globular clusters: a comparison of theoretical giant branch isochrones
T. Lejeune, R. Buser
In view of the important contributions of red giants to the integrated light in evolutionary synthesis calculations of old stellar populations in clusters and galaxies, we provide…
Model atmosphere calibration for synthetic photometry applications: the uvby Stromgren photometric system
T. Lejeune, E. Lastennet, P. Westera +1
In view of the importance of accurate fundamental stellar parameters for `Spectro-photometric dating of stars and galaxies", we present simultaneous effective temperature and metal…
Simultaneous (age, metallicity) estimates of the Hyades open cluster from three binary systems
E. Lastennet, D. Valls-Gabaud, T. Lejeune +1
Three binary systems in the Hyades open cluster, with known metallicity and good Johnson photometric data are used to test the validity of three independent sets of stellar evoluti…
Consequences of Hipparcos parallaxes for stellar evolutionary models. Three Hyades binaries: V818 Tauri, 51 Tauri, and Tauri
E. Lastennet, D. Valls-Gabaud, T. Lejeune +1
Three binary systems in the Hyades open cluster (51 Tau, V818 Tau, and Tau}, with known metallicity and good Johnson photometric data are used to test the validity of three i…