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We present the discovery by the WASP-South transit survey of three newtransiting hot Jupiters, WASP-161 b, WASP-163 b and WASP-170 b. Follow-upradial velocities obtained with the Euler/CORALIE spectrograph andhigh-precision transit light curves obtained with the TRAPPIST-North,TRAPPIST-South, SPECULOOS-South, NITES, and Euler telescopes have enabled us todetermine the masses and radii for these transiting exoplanets. WASP-161\,bcompletes an orbit around its $V=11.1$ F6V-type host star in 5.406 days, andhas a mass and radius of $2.5\pm 0.2$$M_{Jup}$ and $1.14\pm 0.06$ $R_{Jup}$respectively. WASP-163\,b has an orbital period of 1.609 days, a mass of$1.9\pm0.2$ $M_{Jup}$, and a radius of $1.2\pm0.1$ $R_{Jup}$. Its host star isa $V=12.5$ G8-type dwarf. WASP-170\,b is on a 2.344 days orbit around aG1V-type star of magnitude $V=12.8$. It has a mass of $1.7\pm0.2$ $M_{Jup}$ anda radius of $1.14\pm0.09$ $R_{Jup}$. Given their irradiations ($\sim10^9$erg.s$^{-1}$.cm$^{-2}$) and masses, the three new planets sizes are in goodagreement with classical structure models of irradiated giant planets.

Discovery of three new transiting hot Jupiters: WASP-161 b, WASP-163 b and WASP-170 b