Bibcode
Sousa, Sérgio; Santos, N. C.; Israelian, G.; Lovis, C.; Mayor, M.; Lo Curto, G.; Udry, S.
Referencia bibliográfica
American Astronomical Society, ESS meeting #2, #33.05
Fecha de publicación:
9
2011
Número de citas
0
Número de citas referidas
0
Descripción
To understand the formation and evolution of solar-type stars and
planets in the solar neighborhood, we need to obtain their stellar
parameters with high precision. We present a catalog of precise stellar
parameters for the FGK stars in a volume limited sample followed by the
HARPS spectrograph in the quest for extra solar planets. The
spectroscopic analysis was completed assuming LTE with a grid of Kurucz
atmosphere models and using the ARES code for an automatic measurement
of the line equivalent widths. The results are compared against
different independent methods and also with other values
that are found in the literature for common stars. Both comparisons are
consistent and show the homogeneity of the parameters derived by our
team.
The derived metallicities in this sample reveal a somewhat different
distribution for the present planet hosts, but still indicates the
already know higher frequency of planets observed for the more metal
rich stars. We combine the results derived in this sample with the one
from CORALIE survey to present the largest homogeneous spectroscopic
study of the metallicity-giant planet relation.