WASP-43b: the closest-orbiting hot Jupiter

  title={WASP-43b: the closest-orbiting hot Jupiter},
  author={Coel Hellier and D. R. Anderson and Andrew Collier Cameron and Micha{\"e}l Gillon and Emmanuel Jehin and Monika Lendl and P. F. L. Maxted and Francesco A. Pepe and Don Pollacco and Didier Queloz and Damien S{\'e}gransan and Barry Smalley and A.M.S. Smith and John Southworth and A. H. M. J. Triaud and St{\'e}phane Udry and Richard G. West},
We report the discovery of WASP-43b, a hot Jupiter transiting a K7V star every 0.81 d. At 0.6-Mthe host star has the lowest mass of any star currently known to host a hot Jupiter. It also shows a 15.6-d rotation period. The planet has a mass of 1.8 MJup, a radius of 0.9 RJup, and with a semi-major axis of only 0.014 AU has the smallest orbital distance of any known hot Jupiter. The discovery of such a planet around a K7V star shows that planets with apparently short remaining lifetimes owing to… 

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