WASP-167b/KELT-13b: joint discovery of a hot Jupiter transiting a rapidly-rotating F1V star (2017)
AuthorsTemple LY, Hellier C, Albrow MD, Anderson DR, Bayliss D, Beatty TG, Bieryla A, Brown DJA, Cargile PA, Cameron AC, Collins KA, Colon KD, Curtis IA, D'Ago G, Delrez L, Eastman J, Gaudi BS, Gillon M, Gregorio J, James D, Jehin E, Joner MD, Kielkopf JF, Kuhn RB, Labadie-Bartz J, Latham DW, Lendl M, Lund MB, Malpas AL, Maxted PFL, Myers G, Oberst TE, Pepe F, Pepper J, Pollacco D, Queloz D, Rodriguez JE, Segransan D, Siverd RJ, Smalley B, Stassun KG, Stevens DJ, Stockdale C, Tan TG, Triaud AHMJ, Udry S, West RG, Zhou G, Villanueva Jr Sshow all
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 RJup planet was confirmed by Doppler tomography of the stellar line profiles during transit. We place a limit of < 8 MJup on its mass. The planet is in a retrograde orbit with a sky-projected spin-orbit angle of λ = −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 δ-Scuti or γ-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.
Keywordstechniques: photometric; techniques: spectroscopic; planets and satellites: individual; stars: individual; planetary systems; stars: rotation
ANZSRC Fields of Research51 - Physical sciences::5101 - Astronomical sciences::510109 - Stellar astronomy and planetary systems
02 - Physical Sciences::0201 - Astronomical and Space Sciences::020102 - Astronomical and Space Instrumentation