Volume 581, September 2015
|Number of page(s)||10|
|Section||Planets and planetary systems|
|Published online||28 August 2015|
The SOPHIE search for northern extrasolar planets
1 Aix Marseille Université, CNRS, Laboratoire d’Astrophysique de Marseille UMR 7326, 13388 Marseille Cedex 13, France
2 Département d’Astronomie de l’Université de Genève, 51 ch. des Maillettes – Sauverny, 1290 Versoix, Switzerland
3 Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, Portugal
4 Univ. Grenoble Alpes, IPAG, 38000 Grenoble, France
5 Institut d’Astrophysique de Paris, UMR 7095 CNRS, Université Pierre & Marie Curie, 98bis boulevard Arago, 75014 Paris, France
6 Aix Marseille Université, CNRS, OHP, Institut Pythéas UMS 3470, 04870 Saint-Michel-l’ Observatoire, France
7 Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
8 CFHT, 65-1238 Mamalahoa Hwy, 96743 Kamuela HI, USA
9 Sorbonne Université, UPMC Univ Paris 06, UMR 7095, Institut d’Astrophysique de Paris, 75014 Paris, France
10 CNRS, IPAG, 38000 Grenoble, France
Received: 16 April 2015
Accepted: 12 June 2015
High-precision radial velocity surveys explore the population of low-mass exoplanets orbiting bright stars. This allows accurately deriving their orbital parameters such as their occurrence rate and the statistical distribution of their properties. Based on this, models of planetary formation and evolution can be constrained. The SOPHIE spectrograph has been continuously improved in past years, and thanks to an appropriate correction of systematic instrumental drift, it is now reaching 2 m s-1precision in radial velocity measurements on all timescales. As part of a dedicated radial velocity survey devoted to search for low-mass planets around a sample of 190 bright solar-type stars in the northern hemisphere, we report the detection of a warm Neptune with a minimum mass of 16.1 ± 2.7M⊕ orbiting the solar analog HD 164595 in 40 ± 0.24 days. We also revised the parameters of the multiplanetary system around HD 190360. We discuss this new detection in the context of the upcoming space mission CHEOPS, which is devoted to a transit search of bright stars harboring known exoplanets.
Key words: planetary systems / techniques: radial velocities / stars: individual: HD 164595 / stars: individual: HD 190360 / stars: individual: HD 185144
Based on observations made with SOPHIE spectrograph on the 1.93-m telescope at Observatoire de Haute-Provence (CNRS/OSU Pythéas), France (program 07A.PNP.CONS).
Appendix A is available in electronic form at http://www.aanda.org
© ESO, 2015
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