The HARPS search for southern extra-solar planets . XXII. Multiple planet systems from the HARPS volume limited sample
Abstract
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.
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 (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/512/A48- Publication:
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Astronomy and Astrophysics
- Pub Date:
- March 2010
- DOI:
- 10.1051/0004-6361/200913523
- Bibcode:
- 2010A&A...512A..48L
- Keywords:
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- 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