Bibcode
Sousa, S. G.; Santos, N. C.; Israelian, G.; Mayor, M.; Udry, S.
Bibliographical reference
Astronomy and Astrophysics, Volume 533, id.A141
Advertised on:
9
2011
Journal
Citations
240
Refereed citations
219
Description
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 low-activity FGK single stars in a volume-limited sample
followed by the HARPS spectrograph in the quest to identify extra-solar
planets. The spectroscopic analysis was completed assuming LTE with a
grid of Kurucz atmosphere models and using the ARES code to perform an
automatic measurement of the line equivalent widths. The results are
compared with different independent methods and also with other values
found in the literature for common stars. Both comparisons are
consistent and illustrate the homogeneity of the parameters derived by
our team. The derived metallicities of this sample reveal a somewhat
different distribution for the present planet hosts, but still indicates
the already known higher frequency of planets observed for the more
metal-rich stars. We combine the results derived in this sample with the
one from the CORALIE survey to present the largest homogeneous
spectroscopic study of the metallicity-giant-planet relation using a
total of 1830 stars.
Full Table 1 is only available in electronic form at the CDS via
anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/533/A141
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Several spectroscopic analyses of stars with planets have recently been carried out. One of the most remarkable results is that planet-harbouring stars are on average more metal-rich than solar-type disc stars. Two main explanations have been suggested to link this metallicity excess with the presence of planets. The first of these, the “self
Garik
Israelian