* Astronomy

Title: WASP-167b/KELT-13b: Joint discovery of a hot Jupiter transiting a rapidly-rotating F1V star
Author: L.Y. Temple, C. Hellier, M. D. Albrow, D.R. Anderson, D. Bayliss, T. G. Beatty, A. Bieryla, D.J.A. Brown, P. A. Cargile, A. Collier Cameron, K. A. Collins, K. D. Colón, I. A. Curtis, G. D'Ago, L. Delrez, J. Eastman, B. S. Gaudi, M. Gillon, J. Gregorio, D. James, E. Jehin, M. D. Joner, J. F. Kielkopf, R. B. Kuhn, J. Labadie-Bartz, D. W. Latham, M. Lendl, M. B. Lund, A. L. Malpas, P.F.L. Maxted, G. Myers, T. E. Oberst, F. Pepe, J. Pepper, D. Pollacco, D. Queloz, J. E. Rodriguez, D. Ségransan, R. J. Siverd, B. Smalley, K. G. Stassun, D. J. Stevens, C. Stockdale, T.G. Tan, A.H.M.J. Triaud, S. Udry, S. Villanueva Jr, R.G. West, G. Zhou

We report the joint WASP/KELT discovery of WASP-167b/KELT-13b, a transiting hot Jupiter with a 2.02-d orbit around a V = 10.5, F1V star with [Fe/H] = 0.1 ± 0.1. The 1.5 R_Jup planet was confirmed by Doppler tomography of the stellar line profiles during transit. We place a limit of < 8 M_Jup on its mass. The planet is in a retrograde orbit with a sky-projected spin-orbit angle of lambda=-165°±5°. This is in agreement with the known tendency for orbits around hotter stars to be more likely to be misaligned. WASP-167/KELT-13 is one of the few systems where the stellar rotation period is less than the planetary orbital period. We find evidence of non-radial stellar pulsations in the host star, making it a delta-Scuti or gamma-Dor variable. The similarity to WASP-33, a previously known hot-Jupiter host with pulsations, adds to the suggestion that close-in planets might be able to excite stellar pulsations.

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