WASP-50 b: a hot Jupiter transiting a moderately active solar-type star
- Gillon, M.
- Doyle, A.~P.
- Lendl, M.
- Maxted, P.~F.~L.
- Triaud, A.~H.~M.~J.
- Anderson, D.~R.
- Barros, S.~C.~C.
- Bento, J.
- Collier-Cameron, A.
- Enoch, B.
- Faedi, F.
- Hellier, C.
- Jehin, E.
- Magain, P.
- Montalbán, J.
- Pepe, F.
- Pollacco, D.
- Queloz, D.
- Smalley, B.
- Segransan, D.
- Smith, A.~M.~S.
- Southworth, J.
- Udry, S.
- West, R.~G.
- Wheatley, P.~J.
DOIAbstract
We report the discovery by the WASP transit survey of a giant planet in a close orbit (0.0295 plusmn 0.0009 AU) around a moderately bright (V = 11.6, K = 10) G9 dwarf (0.89 plusmn 0.08 M$_⊙$, 0.84 plusmn 0.03 R$_⊙$) in the Southern constellation Eridanus. Thanks to high-precision follow-up photometry and spectroscopy obtained by the telescopes TRAPPIST and Euler, the mass and size of this planet, WASP-50 b, are well constrained to 1.47 plusmn 0.09 M$_Jup$ and 1.15 plusmn 0.05 R$_Jup$, respectively. The transit ephemeris is 2 455 558.6120 (plusmn0.0002) + N times 1.955096 (plusmn0.000005) HJD$_UTC$. The size of the planet is consistent with basic models of irradiated giant planets. The chromospheric activity (log R'$_HK = -4.67$) and rotatio...
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