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

K. Barkaoui, A. Burdanov, C. Hellier, M. Gillon, B. Smalley, P. F. L. Maxted, M. Lendl, A. H. M. J. Triaud, J. Anderson, J. McCormac, E. Jehin, Y. Almleaky, D. J. Armstrong, Z. Benkhaldoun, F. Bouchy, D. J. A. Brown, A. C. Cameron, A. Daassou, L. Delrez, E. DucrotE. Foxell, C. Murray, L. D. Nielsen, F. Pepe, D. Pollacco, F. J. Pozuelos, D. Queloz, D. Segransan, S. Udry, S. Thompson, R. G. West

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We present the discovery of three new transiting hot Jupiters by the WASP-South project, WASP-161 b, WASP-163 b and WASP-170 b. Follow-up radial velocities obtained with the Euler/CORALIE spectrograph and transit light curves obtained with the TRAPPIST-North, TRAPPIST-South, SPECULOOS-South, NITES, and Euler telescopes have enabled us to determine the masses and radii for these transiting exoplanets. WASP-161 b completes an orbit around its V=11.1 F6V-type host star in 5.406 days, and has a mass M p = 2.5 ± 0.2 MJup and radius R p = 1.14 ± 0.06 RJup. WASP-163 b orbits around its host star (spectral type G8V and magnitude V = 12.5) every 1.609 days, has a mass of M p = 1.9 ± 0.2 MJup and a radius of R p = 1.2 ± 0.1 RJup. WASP-170 b has a mass of 1.7 ± 0.2 MJup and a radius of 1.14 ± 0.09 RJup and is on a 2.344 days orbit around a G1V-type star of magnitude V=12.8. Given the irradiations (~ 109 erg and masses, the three new planets' sizes are in good agreement with classical models of irradiated giant planets.
Original languageEnglish
Article number43
Number of pages10
JournalAstronomical Journal
Issue number2
Early online date11 Jan 2019
Publication statusPublished - Feb 2019


  • Planetary systems
  • Techniques: photometric
  • Techniques: radial velocities
  • Techniques: spectroscopic


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