The HARPS search for southern extrasolar planets - XXIII. 8 planetary companions to low-activity solar-type stars

  title={The HARPS search for southern extrasolar planets - XXIII. 8 planetary companions to low-activity solar-type stars},
  author={Dominique Naef and Michel Mayor and Gaspare Lo Curto and François Bouchy and Christophe Lovis and Claire Moutou and W. Benz and Francesco A. Pepe and Didier Queloz and Nuno C. Santos and Damien S{\'e}gransan and St{\'e}phane Udry and Xavier Bonfils and Xavier Delfosse and Thierry Forveille and Guillaume H{\'e}brard and Christoph Mordasini and Christian Perrier and Isabelle Boisse and Danuta Sosnowska},
  journal={Astronomy and Astrophysics},
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, HD 44219, HD 148156, and HD 156411. Keplerian fits to these data reveal the presence of low-mass companions around these targets. With minimum masses ranging from 0.58 to 2.54 MJup, these companions are in the planetary mass domain. The orbital periods of these planets range from slightly less than one to… 

Figures and Tables from this paper

The HARPS search for southern extra-solar planets XXVII. Seven new planetary systems

We are conducting a planet search survey with HARPS since seven years. The volume-limited stellar sample includes all F2 to M0 main-sequence stars within 57.5 pc, where extrasolar planetary

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

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

The HARPS search for southern extra-solar planets - XXXII. New multi-planet systems in the HARPS volume limited sample: a super-Earth and a Neptune in the habitable zone

The vast diversity of planetary systems detected to date is defying our capability of understanding their formation and evolution. Well-defined volume-limited surveys are the best tool at our

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 precise


We present a set of 109 new, high-precision Keck/HIRES radial velocity (RV) observations for the solar-type star HD 32963. Our data set reveals a candidate planetary signal with a period of 6.49 ±

Extrasolar planets in stellar multiple systems

Aims. Analyzing exoplanets detected by radial velocity (RV) or transit observations, we determine the multiplicity of exoplanet host stars in order to study the influence of a stellar companion on

3D Selection of 167 Substellar Companions to Nearby Stars

We analyze 5108 AFGKM stars with at least five high-precision radial velocity points, as well as Gaia and Hipparcos astrometric data, utilizing a novel pipeline developed in previous work. We find

The planet search programme at the ESO CES and HARPS - IV. The search for Jupiter analogues around solar-like stars

Context. In 1992 we began a precision radial velocity survey for planets around solar-like stars with the Coude Echelle Spectrograph and the Long Camera (CES LC) at the 1.4m telescope in La Silla

Search for brown-dwarf companions of stars

Context. The frequency of brown-dwarf companions in close orbit around Sun-like stars is low compared to the frequency of planetary and stellar companions. There is presently no comprehensive



The HARPS survey for southern extra-solar planets. II. A 14 Earth-masses exoplanet around μ Arae

In this letter we present the discovery of a very light planetary companion to the star mu Ara (HD160691). The planet orbits its host once every 9.5days, and induces a sinusoidal radial velocity

The HARPS search for southern extra-solar planets: XVIII. An Earth-mass planet in the GJ 581 planetary system

The GJ 581 planetary system was already known to harbour three planets, including two presumably rocky planets which straddle its habitable zone. We report here the detection of an additional planet

The HARPS search for southern extra-solar planets - XX. Planets around the active star BD -08°2823

We report the detection of a planetary system around BD-08 degrees 2823 that includes at least one Uranus-mass planet and one Saturnmass planet. This discovery serendipitously originates from a

High-eccentricity planets from the Anglo-Australian Planet Search

We report Doppler measurements of the stars HD 187085 and HD 20782 which indicate two high eccentricity low-mass companions to the stars. We find HD 187085 has a Jupiter-mass companion with a �1000 d

HD 80606 b, a planet on an extremely elongated orbit

We report the detection of a planetary companion orbiting the solar-type star HD 80606, the brighter component of a wide binary with a projected separation of about 2000 AU. Using high-signal

Asteroseismology of the planet-hosting star μ Arae I. The acoustic spectrum

We present HARPS spectroscopy of μ Arae (HD 160691) performed for studying the origin of the metallicity excess in this planet-hosting stars. The asteroseismologic campaign led to the previously

Extrasolar planet population synthesis - II. Statistical comparison with observations

Context. This is the second paper in a series of papers showing the results of extrasolar planet population synthesis calculations using our extended core accretion model. In the companion paper

Detailed theoretical models for extra-solar planet-host stars. The ``red stragglers'' HD 37124 and HD 46375

In this paper we analyse and discuss the HR Diagram position of two extra-solar planet-host stars - HD 37124 and HD 46375 - by means of theoretical stellar evolution models. This work was triggered

The N2K Consortium. VII. Atmospheric Parameters of 1907 Metal-rich Stars: Finding Planet-Search Targets

We report high-precision atmospheric parameters for 1907 stars in the N2K low-resolution spectroscopic survey, designed to identify metal-rich FGK dwarfs likely to harbor detectable planets. Of these

The CORALIE survey for southern extra-solar planets - IX. A 1.3-day period brown dwarf disguised as a planet

In this article we present the case of HD 41004 AB, a system composed of a K0V star and a 3.7-mag fainter M-dwarf companion. We have obtained 86 CORALIE spectra of this system with the goal of