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arXiv · 1903.06622

Three Hot-Jupiters on the upper edge of the mass-radius distribution: WASP-177, WASP-181 and WASP-183

Oliver D. Turner·D. R. Anderson·K. Barkaoui·F. Bouchy·Z. Benkhaldoun·D. J. A. Brown·A. Burdanov·A. Collier Cameron·E. Ducrot·M. Gillon·C. Hellier·E. Jehin·M. Lendl·P. F. L. Maxted·L. D. Nielsen·F. Pepe·D. Pollacco·F. J. Pozuelos·D. Queloz·D. Segransan·B. Smalley·A. H. M. J. Triaud·S. Udry·R. G. West
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Abstract

We present the discovery of 3 transiting planets from the WASP survey, two hot-Jupiters: WASP-177b (~0.5 M_Jup, ~1.6 R_Jup) in a 3.07-d orbit of a V = 12.6 K2 star, WASP-183b (~0.5 M_Jup, ~1.5 R_Jup) in a 4.11-d orbit of a V = 12.8 G9/K0 star; and one hot-Saturn planet WASP-181b (~0.3 M_Jup, ~1.2 R_Jup) in a 4.52-d orbit of a V = 12.9 G2 star. Each planet is close to the upper bound of mass-radius space and has a scaled semi-major axis, a/R_star, between 9.6 and 12.1. These lie in the transition between systems that tend to be in orbits that are well aligned with their host-star's spin and those that show a higher dispersion.

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Oliver D. Turner, D. R. Anderson, K. Barkaoui, F. Bouchy, Z. Benkhaldoun, D. J. A. Brown, A. Burdanov, A. Collier Cameron, E. Ducrot, M. Gillon, C. Hellier, E. Jehin, M. Lendl, P. F. L. Maxted, L. D. Nielsen, F. Pepe, D. Pollacco, F. J. Pozuelos, D. Queloz, D. Segransan, B. Smalley, A. H. M. J. Triaud, S. Udry, R. G. West. 2019-03-15. Three Hot-Jupiters on the upper edge of the mass-radius distribution: WASP-177, WASP-181 and WASP-183. https://doi.org/10.1093/mnras%2Fstz742

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