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

D. Naef, M. Mayor, G. Lo Curto, F. Bouchy, C. Lovis, C. Moutou, W. Benz, F. Pepe, D. Queloz, N. C. Santos, D. Sťgransan, S. Udry, X. Bonfils, X. Delfosse, T. Forveille, G. Hťbrard, C. Mordasini, C. Perrier, I. Boisse, D. Sosnowska

Abstract
In this paper, we present our HARPS radial-velocity data for eight low-activity solar-type stars belonging to the HARPS volumelimited sample: HD6718, HD8535, HD28254, HD290327, HD43197, HD44219, HD148156, and HD156411. Keplerian fits to these data reveal the presence of low-mass companions around these targets. With minimum masses ranging from 0.58 to 2.54MJup, these companions are in the planetary mass domain. The orbital periods of these planets range from slightly less than one to almost seven years. The eight orbits presented in this paper exhibit a wide variety of eccentricities: from 0.08 to above 0.8.

Keywords
planetary systems - techniques: radial velocities - techniques: spectroscopic

Notes
Based on observations made with the HARPS instrument on the ESO 3.6-m telescope at the La Silla Observatory (Chile) under the GTO programme ID 072.C-0488.
Radial-velocity tables are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/523/A15

Astronomy and Astrophysics
Volume 523, Number of pages A15_1
2010 November

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Instituto de Astrof√≠sica e Ci√™ncias do Espa√ßo Universidade do Porto Faculdade de Ciências da Universidade de Lisboa
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia