Abstract
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. 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. 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.
Highlights
The study of extrasolar planetary systems is steadily becoming a mature field of research
We present the content of the catalogue, the different sources of stellar parameters used, and some considerations about future improvements
The sample of 48 stars consists of dwarfs of spectral type F, G, or K that are known to be orbited by a planet found by the radial velocity method
Summary
The study of extrasolar planetary systems is steadily becoming a mature field of research. This result is expected from the models of planetary formation following the core-accretion paradigm (Laughlin et al 2004; Ida & Lin 2005; Kennedy & Kenyon 2008); see Kornet et al (2005) and Boss (2006) We note that this correlation may be related to the different trend in stellar metallicity that has been suggested to exist for intermediate mass giant stars with planets (Pasquini et al 2007; Ghezzi et al 2010a; Hekker & Meléndez 2007). Since accurate values for these are usually not possible, it is critical that at least uniform sets of stellar parameters exist This is not always the case, with different teams making use of different methods (line-lists, model atmospheres, methodologies) to derive the atmospheric properties of the host stars. We present the content of the catalogue, the different sources of stellar parameters used, and some considerations about future improvements
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