Issue |
A&A
Volume 535, November 2011
|
|
---|---|---|
Article Number | A54 | |
Number of page(s) | 8 | |
Section | Planets and planetary systems | |
DOI | https://doi.org/10.1051/0004-6361/200913580 | |
Published online | 04 November 2011 |
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⋆,⋆⋆
1
Observatoire Astronomique de l’Université de Genève,
51 ch. des Maillettes – Sauverny,
1290
Versoix,
Switzerland
e-mail: Damien.Segransan@unige.ch
2
Physikalisches Institut, Universitat Bern,
Silderstrasse 5, 3012
Bern,
Switzerland
3
Institut d’Astrophysique de Paris, UMR 7095 CNRS, Université
Pierre & Marie Curie, 98bis
boulevard Arago, 75014
Paris,
France
4
Observatoire de Haute-Provence, 04870 Saint-Michel l’ Observatoire,
France
5
Max-Planck-Institut für Astronomie, Königstuhl 17, 69117
Heidelberg,
Germany
6
Laboratoire d’Astrophysique de Marseille, UMR 6110 CNRS,
Université de Provence, 38 rue
Frédéric Joliot-Curie, 13388
Marseille Cedex 13,
France
7
European Southern Observatory, Karl-Schwarzschild-Str. 2, 85748
Garching bei München,
Germany
8
Centro de Astrofísica, Universidade do Porto,
Rua das Estrelas, 4150-762
Porto,
Portugal
Received:
2
November
2009
Accepted:
29
March
2011
We report the detection of four new extrasolar planets in orbit around the moderately active stars HD 63765, HD 104067, HIP 70849, and HD 125595 with the HARPS Echelle spectrograph mounted on the ESO 3.6-m telescope at La Silla. The first planet, HD 63765 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, HD 104067 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, HD 12595, with a 9.67-day-period. Finally, HIP 7849 b 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.
Key words: techniques: radial velocities / planetary systems / stars: individual: HD 63765 / stars: individual: HD 104067 / stars: individual: HD 125595 / stars: individual: HIP 70849
The HARPS radial velocity measurements discussed in this paper are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/535/A54
© ESO, 2011
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