4 papers
Galactic Evolution of Beryllium and Oxygen
Garik Israelian, Ramon Garcia Lopez, Rafael Rebolo
We discuss the early evolution of beryllium and oxygen in our Galaxy by comparing abundances of these elements for halo and disk metal-poor stars. Both, O and Be rise as we go prog…
Beryllium abundances in parent stars of extrasolar planets: 16 Cyg A & B and rho 1 Cnc
R. J. Garcia Lopez, M. R. Perez de Taoro
The Be II 3131 A doublet has been observed in the solar-type stars 16 Cyg A & B and in the late G-type star rho 1 Cnc, to derive their beryllium abundances. 16 Cyg A & B show simil…
Beryllium, Lithium and Oxygen Abundances in F-type Stars
R. J. Garcia Lopez, M. C. Dominguez Herrera, M. R. Perez de Taoro +4
Beryllium and oxygen abundances have been derived in a sample of F-type field stars for which lithium abundances had been measured previously, with the aim of obtaining observation…
Stars Approaching the Substellar Limit in the alpha Persei Open Cluster
M. R. Zapatero Osorio, R. Rebolo, E. L. Martin +1
We present intermediate dispersion optical spectroscopy for seven very low-mass stars in the alpha Per open cluster with spectral types between M3 and M6, including the brown dwarf…