The HARPS search for southern extrasolar planets - XXV. Results from the metal-poor sample

@article{Santos2011TheHS,
  title={The HARPS search for southern extrasolar planets - XXV. Results from the metal-poor sample},
  author={Nuno C. Santos and Michel Mayor and Xavier Bonfils and Xavier Dumusque and François Bouchy and Pedro Figueira and Christophe Lovis and Claudio H. F. Melo and Francesco A. Pepe and Didier Queloz and Damien S'egransan and S{\'e}rgio G. Sousa and St{\'e}phane Udry},
  journal={Astronomy and Astrophysics},
  year={2011},
  volume={526}
}
Searching for extrasolar planets around stars of different metallicity may provide strong constraints to the models of planet formation and evolution. In this paper we present the overall results of a HARPS (a high-precision spectrograph mostly dedicated to deriving precise radial velocities) program to search for planets orbiting a sample of 104 metal-poor stars (selected [Fe/H] below −0.5). Radial velocity time series of each star are presented and searched for signals using several… Expand
The HARPS search for southern extra-solar planets XXXV. The interesting case of HD 41248: stellar activity, no planets?
Context. The search for planets orbiting metal-poor stars is of utmost importance for our understanding of planet formation models. However, no dedicated searches have been conducted so far for veryExpand
The HARPS search for southern extra-solar planets XL. Searching for Neptunes around metal-poor stars
Context. As a probe of the metallicity of proto-planetary disks, stellar metallicity is an important ingredient for giant planet formation, most likely through its effect on the timescales in whichExpand
Spectroscopic stellar parameters for 582 FGK stars in the HARPS volume-limited sample. Revising the metallicity-planet correlation
To understand the formation and evolution of solar-type stars and planets in the solar neighborhood, we need to obtain their stellar parameters with high precision. We present a catalog of preciseExpand
The GAPS Programme with HARPS-N at TNG
Context. Statistical studies of exoplanets have shown that giant planets are more commonly hosted by metal-rich dwarf stars than low-metallicity stars, while no such correlation is evident for lowerExpand
Li abundances in F stars: planets, rotation, and Galactic evolution
Aims. We aim, on the one hand, to study the possible differences of Li abundances between planet hosts and stars without detected planets at effective temperatures hotter than the Sun, and on theExpand
The frequency of giant planets around metal-poor stars
Context. The discovery of about 700 extrasolar planets, so far, has lead to the first statistics concerning extrasolar planets. The presence of giant planets seems to depend on stellar metallicityExpand
Chemical abundances of 1111 FGK stars from the HARPS GTO planet search program - Galactic stellar populations and planets
Context. We performed a uniform and detailed abundance analysis of 12 refractory elements (Na, Mg, Al, Si, Ca, Ti, Cr, Ni, Co, Sc, Mn, and V) for a sample of 1111 FGK dwarf stars from the HARPS GTOExpand
Planetary companions around the metal-poor star HIP 11952
Aims. We carried out a radial-velocity survey to search for planets around metal-poor stars. In this paper we report the discovery of two planets around HIP 11952, a metal-poor star with [Fe/H]=−1.9Expand
An HST search for planets in the lower main sequence of the globular cluster NGC 6397
Searches for planetary transits carried out in open and globular clusters have to date yielded only a handful of weak, unconfirmed candidates. These results have been interpreted as either beingExpand
Overabundance of alpha-elements in exoplanet host stars
We present the results for a chemical abundance analysis between planet-hosting and stars without planets for 12 refractory elements for a total of 1111 nearby FGK dwarf stars observed within theExpand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 50 REFERENCES
The HARPS search for southern extra-solar planets - XII. A giant planet orbiting the metal-poor star HD 171028
In this paper we present the detection of a 1.8 MJup 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 theExpand
Spectroscopic characterization of a sample of metal-poor solar-type stars from the HARPS planet search program
Stellar metallicity strongly correlates with the presence of planets and their properties. To check for new correlations between stars and the existence of an orbiting planet, we determine preciseExpand
The Planet-Metallicity Correlation
We have recently carried out spectral synthesis modeling to determine Teff, log g, v sin i, and [Fe/H] for 1040 FGK-type stars on the Keck, Lick, and Anglo-Australian Telescope planet searchExpand
The HARPS search for southern extra-solar planets XXI. Three new giant planets orbiting the metal-poor stars HD 5388, HD 181720, and HD 190984 ,
We present the discovery of three new giant planets around three metal-deficient stars: HD 5388 b (1.96 MJup), HD 181720 b (0.37 MJup), and HD 190984 b (3.1 MJup). All the planets have moderatelyExpand
Elodie metallicity-biased search for transiting Hot Jupiters I. Two Hot Jupiters orbiting the slig
We report the discovery of a new planet candidate orbiting the subgiant star HD118203 with a period of P=6.1335 days. The best Keplerian solution yields an eccentricity e=0.31 and a minimum massExpand
Four New Planets Orbiting Metal-enriched Stars*
We report the detection of four new extrasolar planets from the Anglo-Australian Planet Search orbiting the metal-enriched stars HD 73526, HD 76700, HD 30177, and HD 2039. The planetary companion ofExpand
The HARPS search for southern extra-solar planets - VI. A Neptune-mass planet around the nearby M dwarf Gl 581
We report the discovery of a Neptune-mass planet around Gl 581 (M3V, M = 0.31 ), based on precise Doppler measurements with the HARPS spectrograph at La Silla Observatory. The radial velocitiesExpand
The HARPS search for southern extrasolar planets - XXIII. 8 planetary companions to low-activity solar-type stars
In this paper, we present our HARPS radial-velocity data for eight low-activity solar-type stars belonging to the HARPS volumelimited sample: HD 6718, HD 8535, HD 28254, HD 290327, HD 43197, HDExpand
Spectroscopic parameters for 451 stars in the HARPS GTO planet search program - Stellar [Fe/H] and the frequency of exo-Neptunes
To understand the formation and evolution of solar-type stars in the solar neighborhood, we need to measure their stellar parameters to high accuracy. We present a catalogue of accurate stellarExpand
A KECK HIRES DOPPLER SEARCH FOR PLANETS ORBITING METAL-POOR DWARFS. II. ON THE FREQUENCY OF GIANT PLANETS IN THE METAL-POOR REGIME
We present an analysis of three years of precision radial velocity (RV) measurements of 160 metal-poor stars observed with HIRES on the Keck 1 telescope. We report on variability and long-termExpand
...
1
2
3
4
5
...