TY - JOUR
T1 - Spectroscopic metallicities for planet-host stars
T2 - Extending the samples
AU - Santos, N. C.
AU - Israelian, G.
AU - Mayor, M.
AU - Bento, J. P.
AU - Almeida, P. C.
AU - Sousa, S. G.
AU - Ecuvillon, A.
PY - 2005/7
Y1 - 2005/7
N2 - 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.
AB - 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.
KW - Stars: abundances
KW - Stars: chemically peculiar
KW - Stars: fundamental parameters
KW - Stars: planetary systems
KW - Stars: planetary systems: formation
UR - http://www.scopus.com/inward/record.url?scp=21844475893&partnerID=8YFLogxK
U2 - 10.1051/0004-6361:20052895
DO - 10.1051/0004-6361:20052895
M3 - Article
AN - SCOPUS:21844475893
VL - 437
SP - 1127
EP - 1133
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
SN - 0004-6361
IS - 3
ER -