Volume 512, March-April 2010
|Number of page(s)||6|
|Section||Planets and planetary systems|
|Published online||30 March 2010|
XXII. Multiple planet systems from the HARPS volume limited sample
ESO – European Southern Observatory, Karl-Schwarzschild-Strasse 2, 85748 Garching bei München, Germany e-mail: email@example.com
2 Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland
3 Physikalisches Institut Universität Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
4 Laboratoire d'Astrophysique de Marseille, Traverse du Siphon, 13376 Marseille, France
5 Centro de Astrofisica, Universidade do Porto, Rua das Estrelas, 4150-762 Porto, Portugal
Accepted: 29 December 2009
We present the detections of three multiple systems within the HARPS volume-limited sample. Among the six planets discussed in this paper, we have identified a “super-Earth” planet with a minimum mass of 6.6 MEarth and a “Neptune” planet with minimum mass of 18 MEarth, both orbiting their parent stars within a distance of 0.05 AU and a period of approximately four days. These detections strengthen the argument that low-mass planets are primarily found in multiple-planetary systems.
Key words: planets and satellites: individual: HD 125612 / planets and satellites: individual: HD 215497 / planets and satellites: individual: HIP 5158 / techniques: radial velocities / techniques: spectroscopic / planets and satellites: general
Based on observations made with the HARPS instrument on the ESO 3.6 m telescope at La Silla (Chile), under the GTO program ID 072.C-0488.
RV tables are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (22.214.171.124) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/512/A48
© ESO, 2010
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