| Issue |
A&A
Volume 474, Number 2, November I 2007
|
|
|---|---|---|
| Page(s) | 647 - 651 | |
| Section | Planets and planetary systems | |
| DOI | https://doi.org/10.1051/0004-6361:20078129 | |
| Published online | 10 September 2007 | |
The HARPS search for southern extra-solar planets*
XII. A giant planet orbiting the metal-poor star HD 171028
1
Centro de Astrofísica, Universidade do Porto, Rua das Estrelas, 4150-762 Porto, Portugal e-mail: nuno@astro.up.pt
2
Observatoire de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland
3
Institut d'Astrophysique de Paris, UMR7095 CNRS, Université Pierre & Marie Curie, 98bis Bd Arago, 75014 Paris, France
Received:
21
June
2007
Accepted:
7
August
2007
In this paper we present the detection of a 1.8 
planet
in a 538-day period trajectory orbiting the metal-poor
star HD 171028 ([Fe/H] = -0.49). This planet is the first to be
discovered in the context of a HARPS program searching for planets around
metal-poor stars. Interestingly, HD 171028 is one of the least metal-poor stars
in the sample. This discovery is placed in the context of the models of planet
formation and evolution.
Key words: stars: planetary systems / planetary systems: formation / techniques: radial velocity / stars: abundances
© ESO, 2007
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