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Confirming the Metal-Rich Nature of Stars with Giant Planets
Nuno C. Santos, Garik Israelian, Michel Mayor
With the goal of confirming the metallicity ``excess'' observed in stars with planetary mass companions, we have conducted a high-precision spectroscopic study of a ``comparison''…
Sulphur abundance in very metal-poor stars
Garik Israelian, Rafael Rebolo
We have obtained high-resolution high signal-to-noise spectra of the SI near-infrared doublet at 8694 A in eight metal-poor stars with metallicities in the range -0.6 <[Fe/H]< -3.0…
The metal-rich nature of stars with planets
N. C. Santos, G. Israelian, M. Mayor
With the goal of confirming the metallicity "excess" present in stars with planetary-mass companions, we present in this paper a high-precision spectroscopic study of a sample of d…
Oxygen in the Very Early Galaxy
G. Israelian, R. Rebolo, R. Garcia Lopez +4
Oxygen abundances in a sample of ultra-metal-poor subdwarfs have been derived from measurements of the oxygen triplet at 7771--5 A and OH lines in the near UV performed in high-res…