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24 April 2024

» arxiv » 1812.9264

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The discovery of WASP-134b, WASP-134c, WASP-137b, WASP-143b and WASP-146b: three hot Jupiters and a pair of warm Jupiters orbiting Solar-type stars
D. R. Anderson ; F. Bouchy ; D. J. A. Brown ; A. Collier Cameron ; L. Delrez ; M. Gillon ; J. I. González Hernández ; C. Hellier ; E. Jehin ; M. Lendl ; P. F. L. Maxted ; M. Neveu-VanMalle ; L. D. Nielsen ; F. Pepe ; M. Perger ; D. Pollacco ; D. Queloz ; J. Rey ; D. Ségransan ; B. Smalley ; B. Toledo-Padrón ; A. H. M. J. Triaud ; O. D. Turner ; S. Udry ; R. G. West ;
Date:	21 Dec 2018
Abstract:	We report the discovery by WASP of five planets orbiting moderately bright ($V$ = 11.0-12.9) Solar-type stars. WASP-137b, WASP-143b and WASP-146b are typical hot Jupiters in orbits of 3-4 d and with masses in the range 0.68--1.11 $M_{ m Jup}$. WASP-134 is a metal-rich ([Fe/H] = +0.40 $pm$ 0.07]) G4 star orbited by two warm Jupiters: WASP-134b ($M_{ m pl}$ = 1.41 $M_{ m Jup}$; $P = 10.1$ d; $e = 0.15 pm 0.01$; $T_{ m eql}$ = 950 K) and WASP-134c ($M_{ m pl} sin i$ = 0.70 $M_{ m Jup}$; $P = 70.0$ d; $e = 0.17 pm 0.09$; $T_{ m eql}$ = 500 K). From observations of the Rossiter-McLaughlin effect of WASP-134b, we find its orbit to be misaligned with the spin of its star ($lambda = -44 pm 10^circ$). WASP-134 is a rare example of a system with a short-period giant planet and a nearby giant companion. In-situ formation or disc migration seem more likely explanations for such systems than does high-eccentricity migration.
Source:	arXiv, 1812.9264
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