EPJ Web of Conferences (Apr 2013)

WTS1 b: The first planet detected in the WFCAM Transit Survey

  • Cruz P.,
  • Hodgkin S.T.,
  • Pinfield D.J.,
  • Koppenhoefer J.,
  • Saglia R.P.,
  • Birkby J.L.,
  • Cappetta M.,
  • Kovács G.,
  • Sipőcz B.

DOI
https://doi.org/10.1051/epjconf/20134701003
Journal volume & issue
Vol. 47
p. 01003

Abstract

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We report the discovery of WTS1 b, the first extrasolar planet found by the WFCAM Transit Survey. For one of the most promising transiting candidates, high-resolution spectra taken at the Hobby-Eberly Telescope (HET) allowed us to estimate the spectroscopic parameters of the host star, a late-F main sequence dwarf (V = 16.13), and to measure its radial velocity variations. The combined analysis of the light curves and spectroscopic data resulted in an orbital period of the companion of 3.35 days, a planetary mass of 4.01 ± 0.35 MJ, and a planetary radius of 1.49 +0.16-0.18 RJ. WTS1 b has one of the largest radius anomalies among the known hot Jupiters in the mass range 3–5 MJ.