Bibcode
Sousa, S. G.; Santos, N. C.; Israelian, G.; Mayor, M.; Udry, S.
Referencia bibliográfica
Astronomy and Astrophysics, Volume 533, id.A141
Fecha de publicación:
9
2011
Revista
Número de citas
240
Número de citas referidas
219
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 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
Proyectos relacionados
Pruebas Observacionales de los Procesos de Nucleosíntesis en el Universo
Recientemente se han llevado a cabo varios análisis espectroscópicos de estrellas con planetas. Uno de los resultados más relevantes ha sido descubrir que las estrellas con planetas son en promedio más metálicas que las estrellas del mismo tipo espectral sin planetas conocidos (Santos, Israelian & Mayor 2001, A&A, 373, 1019; 2004, A&A, 415, 1153)
Garik
Israelian