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19 April 2024

» arxiv » 1310.1994

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Extrasolar planets and brown dwarfs around A--F type stars. VIII. A giant planet orbiting the young star HD113337
S. Borgniet ; I. Boisse ; A.-M. Lagrange ; F. Bouchy ; L. Arnold ; R. F. D'iaz ; F. Galland ; P. Delorme ; G. Hébrard ; A. Santerne ; D. Ehrenreich ; D. Ségransan ; X. Bonfils ; X. Delfosse ; N. C. Santos ; T. Forveille ; C. Moutou ; S. Udry ; A. Eggenberger ; F. Pepe ; N. Astudillo ; G. Montagnier ;
Date:	8 Oct 2013
Abstract:	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.
Source:	arXiv, 1310.1994
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