Bibcode
Santos, N. C.; Sousa, S. G.; Mortier, A.; Neves, V.; Adibekyan, V.; Tsantaki, M.; Delgado Mena, E.; Bonfils, X.; Israelian, G.; Mayor, M.; Udry, S.
Referencia bibliográfica
Astronomy and Astrophysics, Volume 556, id.A150, 11 pp.
Fecha de publicación:
8
2013
Revista
Número de citas
243
Número de citas referidas
233
Descripción
Context. Thanks to the importance that the star-planet relation has to
our understanding of the planet formation process, the precise
determination of stellar parameters for the ever increasing number of
discovered extra-solar planets is of great relevance. Furthermore,
precise stellar parameters are needed to fully characterize the planet
properties. It is thus important to continue the efforts to determine,
in the most uniform way possible, the parameters for stars with planets
as new discoveries are announced. Aims: In this paper we present
new precise atmospheric parameters for a sample of 48 stars with
planets. We then take the opportunity to present a new catalogue of
stellar parameters for FGK and M stars with planets detected by radial
velocity, transit, and astrometry programs. Methods: Stellar
atmospheric parameters and masses for the 48 stars were derived assuming
local thermodynamic equilibrium (LTE) and using high-resolution and high
signal-to-noise spectra. The methodology used is based on the
measurement of equivalent widths for a list of iron lines and making use
of iron ionization and excitation equilibrium principles. For the
catalogue, and whenever possible, we used parameters derived in previous
works published by our team, using well-defined methodologies for the
derivation of stellar atmospheric parameters. This set of parameters
amounts to over 65% of all planet host stars known, including more than
90% of all stars with planets discovered through radial velocity
surveys. For the remaining targets, stellar parameters were collected
from the literature. Results: The stellar parameters for the 48
stars are presented and compared with previously determined literature
values. For the catalogue, we compile values for the effective
temperature, surface gravity, metallicity, and stellar mass for almost
all the planet host stars listed in the Extrasolar Planets
Encyclopaedia. This data will be updated on a continuous basis. The
compiled catalogue is available online. The data can be used for
statistical studies of the star-planet correlation, as well as for the
derivation of consistent properties for known planets.
Based on observations collected at ESO facilities under programs
088.C-0892(A), 089.C-0444(A), 090.C-0146(A) (FEROS spectrograph, 2.2-m
ESO-MPI telescope, La Silla), 380.C-0083(A), and 083.C-0174(A) (UVES
spectrograph, ESO VLT Kueyen telescope, Paranal).The catalogue is only
available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr
(ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/556/A150
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