Extrasolar planets and brown dwarfs around A-F type stars^⋆,⋆⋆

VIII. A giant planet orbiting the young star HD 113337

¹ Institut de Planétologie et d’Astrophysique de Grenoble, UMR 5274 CNRS, Université Joseph Fourier, BP 53, 38041 Grenoble Cedex 9, France
e-mail: Simon.Borgniet@obs.ujf-grenoble.fr
² Centro de Astrofisica, Universidade do Porto, Rua das Estrelas, 4150-762 Porto, Portugal
³ Aix Marseille Université, CNRS, LAM (Laboratoire d’Astrophysique de Marseille) UMR 7326, 13388 Marseille, France
⁴ Aix Marseille Université, CNRS, OHP (Observatoire de Haute-Provence), Institut Pythéas, UMS 3470, 04870 Saint-Michel l’ Observatoire, France
⁵ Institut d’Astrophysique de Paris, UMR 7095 CNRS, Université Pierre & Marie Curie, 98bis boulevard Arago, 75014 Paris, France
⁶ Observatoire de Haute-Provence, CNRS/OAMP, 04870 St-Michel l’ Observatoire, France
⁷ Observatoire de Genève, Université de Genève, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland
⁸ Departamento de Fisica e Astronomia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal

Received: 26 April 2013
Accepted: 23 September 2013

Abstract

Aims. In the context of the search for extrasolar planets and brown dwarfs around early-type main-sequence stars we present the detection of a giant planet around the young F-type star HD 113337. We estimated the age of the system to be 150 Myr. Interestingly, an infrared excess attributed to a cold debris disk was previously detected around this star.

Methods. We used the SOPHIE spectrograph on the 1.93 m telescope at Observatoire de Haute-Provence to obtain ~300 spectra over six years. We used our tool dedicated to the spectra analysis of A and F stars to derive the radial velocity variations.

Results. The data reveal a period of days that we attribute to a giant planet with a minimum mass of 2.83 ± 0.24 M_Jup in an eccentric orbit with e = 0.46 ± 0.04. A long-term quadratic drift, which we assign to be probably of stellar origin, is superimposed on the Keplerian solution.