EDP Sciences
Free access
Issue
A&A
Volume 437, Number 3, July III 2005
Page(s) 1127 - 1133
Section Planets and planetary systems
DOI http://dx.doi.org/10.1051/0004-6361:20052895


A&A 437, 1127-1133 (2005)
DOI: 10.1051/0004-6361:20052895

Spectroscopic metallicities for planet-host stars: Extending the samples

N. C. Santos1, 2, G. Israelian3, M. Mayor2, J. P. Bento1, P. C. Almeida1, S. G. Sousa1 and A. Ecuvillon3

1  Centro de Astronomia e Astrofísica da Universidade de Lisboa, Observatório Astronómico de Lisboa, Tapada da Ajuda, 1349-018 Lisboa, Portugal
    e-mail: Nuno.Santos@oal.ul.pt
2  Observatoire de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland
3  Instituto de Astrofísica de Canarias, 38200 La Laguna, Tenerife, Spain

(Received 17 February 2005 / Accepted 23 March 2005 )

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.


Key words: stars: abundances -- stars: fundamental parameters -- stars: chemically peculiar -- stars: planetary systems -- stars: planetary systems: formation

SIMBAD Objects



© ESO 2005

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access.

An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.

  • If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
  • You can define your own OpenURL resolver with your EDPS Account.
    In this case your choice will be given priority over that of your library.
  • You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.