Spectroscopic metallicities for planet-host stars

Extending the samples

N. C. Santos*, G. Israelian, M. Mayor, J. P. Bento, P. C. Almeida, S. G. Sousa, A. Ecuvillon

*Corresponding author for this work

Research output: Contribution to journalArticle

164 Citations (Scopus)

Abstract

We present stellar parameters and metallicities for 29 planet-host stars, as well as for a large volume-limited sample of 53 stars not known to be orbited by any planetary-mass companion. These stars add to the results presented in our previous series of papers, providing two large and uniform samples of 119 planet-hosts and 94 "single" stars with accurate stellar parameters and [Fe/H] estimates. The analysis of the results further confirms that stars with planets are metal-rich when compared with average field dwarfs. Important biases that may compromise future studies are also discussed. Finally, we compare the metallicity distributions for single planet-hosts and planet-hosts in multiple stellar systems. The results show that a small difference cannot be excluded, in the sense that the latter sample is slighly overmetallic. However, more data are needed to confirm this correlation.

Original languageEnglish
Pages (from-to)1127-1133
Number of pages7
JournalAstronomy and Astrophysics
Volume437
Issue number3
DOIs
Publication statusPublished - Jul 2005

Keywords

  • Stars: abundances
  • Stars: chemically peculiar
  • Stars: fundamental parameters
  • Stars: planetary systems
  • Stars: planetary systems: formation

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