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

## TL;DR

This paper reports the discovery of three transiting exoplanets, including two hot-Jupiters and one hot-Saturn, that are near the upper edge of the mass-radius distribution, providing insights into their orbital alignment characteristics.

## Contribution

The study presents the discovery and characterization of three new transiting planets near the upper mass-radius boundary, highlighting their orbital properties and host star types.

## Key findings

- All three planets are close to the upper bound of the mass-radius space.
- The planets have scaled semi-major axes between 9.6 and 12.1.
- Their orbits are in the transition between aligned and misaligned systems.

## 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.