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

Dominique Naef , Michel Mayor (1) , Gaspare Lo Curto , Francois Bouchy (2, 3) , Christophe Lovis , Claire Moutou (4) , Willy Benz (5) , Francesco Pepe , Didier Queloz (1) , Nuno C. Santos , Damien Segransan (1) , Stephane Udry (1) , Xavier Bonfils (6) , Xavier Delfosse (6) , Thierry Forveille (6) , Guillaume Hebrard (2) , Christoph Mordasini , Christian Perrier , Isabelle Boisse (2) , Danuta Sosnowska (1)

1 ObsGE - Observatoire Astronomique de l'Université de Genève
2 IAP - Institut d'Astrophysique de Paris
3 OHP - Observatoire de Haute-Provence
4 LAM - Laboratoire d'Astrophysique de Marseille
5 Physikalisches Institut [Bern]
6 LAOG - Laboratoire d'Astrophysique de Grenoble

In this paper, we present our HARPS radial-velocity data for eight low-activity solar-type stars belonging to the HARPS volume-limited 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 2.54 MJup, 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.

Domaines: Planétologie et astrophysique de la terre [astro-ph.EP]; Planétologie et astrophysique de la terre [astro-ph.EP]

Dominique Naef, Michel Mayor, Gaspare Lo Curto, Francois Bouchy, Christophe Lovis, et al.. The HARPS search for southern extrasolar planets. XXIII. 8 planetary companions to low-activity solar-type stars. Astronomy and Astrophysics - A&A, 2010, 523, pp.A15. ⟨10.1051/0004-6361/200913616⟩. ⟨hal-00662790⟩