Bibcode
Zendejas, J.; Tata, R.; Stoev, H.; Steele, P.; Solano, E.; Sarro Baro, L.; Pollacco, D.; Palle, E.; Napiwotzki, R.; Murgas, F.; Mislis, D.; Marocco, F.; Lodieu, N.; Kuznetsov, M.; Jones, H. R.; Ivanyuk, O.; Haswell, C.; Goulding, N.; Gálvez-Ortiz, M. C.; Catalan, S.; Campbell, D. A.; Bayo, A.; Barnes, J.; Snellen, I.; Martín, E. L.; del Burgo, C.; Fossati, L.; Pavlenko, Y. V.; Barrado, D.; Nefs, B.; Sipőcz, B.; Kovács, G.; Cruz, P.; Hodgkin, S. T.; Pinfield, D. J.; Koppenhoefer, J.; Birkby, J. L.; Saglia, R. P.; Cappetta, M.
Bibliographical reference
Monthly Notices of the Royal Astronomical Society, Volume 427, Issue 3, pp. 1877-1890.
Advertised on:
12
2012
Citations
24
Refereed citations
16
Description
We report the discovery of WTS-1b, the first extrasolar planet found by
the WFCAM Transit Survey, which began observations at the 3.8-m United
Kingdom Infrared Telescope (UKIRT) in 2007 August. Light curves
comprising almost 1200 epochs with a photometric precision of better
than 1 per cent to J ˜ 16 were constructed for ˜60 000 stars
and searched for periodic transit signals. 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) with possibly
slightly subsolar metallicity, and to measure its radial velocity
variations. The combined analysis of the light curves and spectroscopic
data resulted in an orbital period of the substellar companion of 3.35
d, a planetary mass of 4.01 ± 0.35 MJ and a planetary
radius of 1.49-0.18+0.16 RJ. WTS-1b has one of the largest
radius anomalies among the known hot Jupiters in the mass range 3-5
MJ. The high irradiation from the host star ranks the planet
in the pM class. Based on observations collected at the 3.8-m United
Kingdom Infrared Telescope (Hawaii, USA), the Hobby-Eberly Telescope
(Texas, USA), the 2.5-m Isaac Newton Telescope (La Palma, Spain), the
William Herschel Telescope (La Palma, Spain), the German-Spanish
Astronomical Centre (Calar Alto, Spain), the Kitt Peak National
Observatory (Arizona, USA) and the Hertfordshire's Bayfordbury
Observatory.
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Very Low Mass Stars, Brown Dwarfs and Planets
Our goal is to study the processes that lead to the formation of low mass stars, brown dwarfs and planets and to characterize the physical properties of these objects in various evolutionary stages. Low mass stars and brown dwarfs are likely the most numerous type of objects in our Galaxy but due to their low intrinsic luminosity they are not so
Rafael
Rebolo López