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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 606392.0, MPI für Astronomie / Publikationen_mpia
The HARPS search for southern extra-solar planets. XXIX. Four new planets in orbit around the moderatly active dwarfs HD 63765, HD 104067, HD 125595, and HIP 70849
Authors:Ségransan, D.; Mayor, M.; Udry, S.; Lovis, C.; Benz, W.; Bouchy, F.; Lo Curto, G.; Mordasini, C.; Moutou, C.; Naef, D.; Pepe, F.; Queloz, D.; Santos, N.
Date of Publication (YYYY-MM-DD):2011
Journal Abbrev.:Astronomy and Astrophysics
Audience:Not Specified
Abstract / Description:We report the detection of four new extrasolar planets in orbit around the moderately active stars <ASTROBJ>HD 63765</ASTROBJ>, <ASTROBJ>HD 104067</ASTROBJ>, <ASTROBJ>HIP 70849</ASTROBJ>, and <ASTROBJ>HD 125595</ASTROBJ> with the HARPS Echelle spectrograph mounted on the ESO 3.6-m telescope at La Silla. The first planet, <ASTROBJ>HD 63765</ASTROBJ> b, has a minimum mass of 0.64 MJup, a period of 358 days, and an eccentricity of 0.24. It orbits a G9 dwarf at 0.94 AU. The second planet, <ASTROBJ>HD 104067</ASTROBJ> b, is a 3.6 Neptune-mass-planet with a 55.8-day-period. It orbits its parent K2 dwarf, in a circular orbit with a semi-major axis of a = 0.26 AU. Radial velocity measurements present a ≈ 500-day-oscillation that reveals significant magnetic cycles. The third planet is a 0.77 Neptune-mass-planet in circular orbit around the K4 dwarf, <ASTROBJ>HD 12595</ASTROBJ>, with a 9.67-day-period. Finally, <ASTROBJ>HIP 7849 b</ASTROBJ> is a long-period (5 < P < 75 years) and massive planet of m sin i ≈ 3.5-15 MJup that orbits a late K7 dwarf. The HARPS radial velocity measurements discussed in this paper are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr ( or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/535/A54">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/535/A54</A>Based on observations made with the HARPS instrument on the ESO 3.6 m telescope at La Silla Observatory under the GTO programme ID 072.C-0488.
Free Keywords:techniques: radial velocities; planetary systems; stars: individual:HD 63765; stars: individual:HD 104067; stars: individual:HD 125595; stars: individual:HIP 70849
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
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