19 citations · 19 across the 3 of their papers we have counts for
6 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…
Abundance ratios of volatile vs. refractory elements: hints of pollutions?
A. Ecuvillon, G. Israelian, N. C. Santos +2
We present the abundance ratios [X/H] of a large set of chemical species with condensation temperatures from 75 to 1600 K in an almost complete set of 105 planet-host stars and in…
Metallicity of M dwarfs I. A photometric calibration and impact on the mass-luminosity relation at the bottom of the main sequence
X. Bonfils, X. Delfosse, S. Udry +3
We obtained high resolution ELODIE and CORALIE spectra for both components of 20 wide visual binaries composed of an F-, G- or K-dwarf primary and an M-dwarf secondary. We analyse…
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''…
Bisector analysis as a diagnostic of intrinsic radial-velocity variations
N. C. Santos, M. Mayor, D. Naef +2
In this contribution we present the results of the application of the bisector of the cross-correlation function as a diagnostic of activity-related radial-velocity variations. The…
A planet orbiting the star Gliese 86
D. Queloz, M. Mayor, L. Weber +7
A 4MJ planet with a 15.8day orbital period has been detected from very precise radial velocity measurements with the CORALIE echelle spectrograph. A second remote and more massive…