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Title:
The HARPS search for southern extra-solar planets. XXXVII. Five new long-period giant planets and a system update
Authors:
Moutou, C.; Lo Curto, G.; Mayor, M.; Bouchy, F.; Benz, W.; Lovis, C.; Naef, D.; Pepe, F.; Queloz, D.; Santos, N. C.; Ségransan, D.; Sousa, S. G.; Udry, S.
Affiliation:
AA(Canada France Hawaii Telescope Corporation, Kamuela, 96743, USA ; Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille), UMR 7326, Marseille, France), AB(ESO, Alonso de Córdova 3107, Vitacura, Casilla, 19001, Santiago de Chile, Chile), AC(Observatoire de Genève, Université de Genève, 51 chemin des Maillettes, 1290, Sauverny, Switzerland), AD(Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille), UMR 7326, Marseille, France), AE(Physikalisches Institut Universität Bern, Sidlerstrasse 5, 3012, Bern, Switzerland), AF(Observatoire de Genève, Université de Genève, 51 chemin des Maillettes, 1290, Sauverny, Switzerland), AG(Observatoire de Genève, Université de Genève, 51 chemin des Maillettes, 1290, Sauverny, Switzerland), AH(Observatoire de Genève, Université de Genève, 51 chemin des Maillettes, 1290, Sauverny, Switzerland), AI(Observatoire de Genève, Université de Genève, 51 chemin des Maillettes, 1290, Sauverny, Switzerland), AJ(Instituto de Astrofísica e Ciências do Espaco, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762, Porto, Portugal; Centro de Astrofísica e Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Rua das Estrelas, 4150-762, Porto, Portugal), AK(Observatoire de Genève, Université de Genève, 51 chemin des Maillettes, 1290, Sauverny, Switzerland), AL(Instituto de Astrofísica e Ciências do Espaco, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762, Porto, Portugal; Centro de Astrofísica e Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Rua das Estrelas, 4150-762, Porto, Portugal), AM(Observatoire de Genève, Université de Genève, 51 chemin des Maillettes, 1290, Sauverny, Switzerland)
Publication:
Astronomy & Astrophysics, Volume 576, id.A48, 14 pp. (A&A Homepage)
Publication Date:
04/2015
Origin:
EDP Sciences
Astronomy Keywords:
planetary systems, techniques: radial velocities, techniques: spectroscopic, methods: observational
DOI:
10.1051/0004-6361/201424965
Bibliographic Code:
2015A&A...576A..48M

Abstract

We describe radial-velocity time series obtained by HARPS on the 3.60 m telescope in La Silla (ESO, Chile) over ten years and report the discovery of five new giant exoplanets in distant orbits; these new planets orbit the stars HD 564, HD 30669, HD 108341, and BD -114672. Their periods range from 492 to 1684 days, semi-major axes range from 1.2 to 2.69 AU, and eccentricities range from 0 to 0.85. Their minimum mass ranges from 0.33 to 3.5 MJup. We also refine the parameters of two planets announced previously around HD 113538, based on a longer series of measurements. The planets have a period of 663 ± 8 and 1818 ± 25 days, orbital eccentricities of 0.14 ± 0.08 and 0.20 ± 0.04, and minimum masses of 0.36 ± 0.04 and 0.93 ± 0.06 MJup. Finally, we report the discovery of a new hot-Jupiter planet around an active star, HD 103720; the planet has a period of 4.5557 ± 0.0001 days and a minimum mass of 0.62 ± 0.025 MJup. We discuss the fundamental parameters of these systems and limitations due to stellar activity in quiet stars with typical 2 m s-1 radial velocity precision.

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, 183.C-0972 and the regular programs: 085.C-0019, 087.C-0831, 089.C-0732, 090.C-0421, 091.C-0034, and 092.C-0721.Figures 8 and 9 and Tables 4-9 are available in electronic form at http://www.aanda.org

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