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Centro de Astrofísica da Universidade do Porto

SWEET-Cat: A catalogue of parameters for Stars With ExoplanETs
I. New atmospheric parameters and masses for 48 stars with planets

N. C. Santos, S. G. Sousa, A. Mortier, V. Neves, V. Zh. Adibekyan, M. Tsantaki, E. Delgado Mena, X. Bonfils, G. Israelian, M. Mayor, S. Udry

Abstract
Context. Due 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 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 catalog, 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 catalog, we compile values for the effective temperature, surface gravity, metallicity, and stellar mass for (almost) all the planet host stars listed in the Extra-solar 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.

Keywords
planetary systems – Stars: solar-type – Stars: abundances – Catalogs

Notes
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).
For an updated table we point to http://www.exoplanet.eu

Astronomy and Astrophysics
Volume 556, Page A150_1
August 2013

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