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

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 $M_{\mathrm{Jup}}$. WASP-134 is a metal-rich ([Fe/H] = +0.40 $\pm$ 0.07]) G4 star orbited by two warm Jupiters: WASP-134b ($M_{\mathrm{pl}}$ = 1.41 $M_{\mathrm{Jup}}$; $P=10.1$ d; $e=0.15\pm 0.01$; $T_{\mathrm{eql}}$ = 950 K) and WASP-134c ($M_{\mathrm{pl}}\sin i$ = 0.70 $M_{\mathrm{Jup}}$; $P=70.0$ d; $e=0.17\pm 0.09$; $T_{\mathrm{eql}}$ = 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 ($\hat{I}»=-44\pm 10^{\circ }$). 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.

Submitted to AJ. 10 pages, 8 figures, 4 tables