Extrasolar planets and brown dwarfs around A–F type stars. VIII. A giant planet orbiting the young star HD113337

In the frame 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 HD113337. We estimated the age of the system to be 150 +100/-50 Myr. Interestingly, an IR excess attributed to a cold debris disk was previously detected on this star. The SOPHIE spectrograph on the 1.93m telescope at Observatoire de Haute-Provence was used to obtain ~300 spectra over 6 years. 

We used our SAFIR tool, dedicated to the spectra analysis of A and F stars, to derive the radial velocity variations. The data reveal a 324.0 +1.7/-3.3 days period that we attribute to a giant planet with a minimum mass of 2.83 +- 0.24 Mjup in an eccentric orbit with e=0.46 +- 0.04. A long-term quadratic drift, that we assign to be probably of stellar origin, is superimposed to the Keplerian solution.

S. Borgniet, I. Boisse, A.-M. Lagrange, F. Bouchy, L. Arnold, R. F. D’\iaz, F. Galland, P. Delorme, G. Hebrard, A. Santerne, D. Ehrenreich, D. Segransan, X. Bonfils, X. Delfosse, N. C. Santos, T. Forveille, C. Moutou, S. Udry, A. Eggenberger, F. Pepe, N. Astudillo, G. Montagnier (Submitted on 8 Oct 2013)

Comments: 7 pages, 4 figures

Subjects: Earth and Planetary Astrophysics (astro-ph.EP)

MSC classes: 85

Cite as: arXiv:1310.1994 [astro-ph.EP] (or arXiv:1310.1994v1 [astro-ph.EP] for this version) 

Submission history From: Simon Borgniet [v1] Tue, 8 Oct 2013 03:53:26 GMT (76kb,D) 

X