期刊
ASTRONOMY & ASTROPHYSICS
卷 437, 期 3, 页码 1127-1133出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361:20052895
关键词
stars : abundances; stars : fundamental parameters; stars : chemically peculiar; stars : planetary systems; stars : planetary systems : formation
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.
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