WASP-166b : a bloated super-Neptune transiting a V = 9 star
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We report the discovery of WASP-166b, a super-Neptune planet with a mass of 0.1 MJup (1.9 MNep) and a bloated radius of 0.63 RJup. It transits a V = 9.36, F9V star in a 5.44-d orbit that is aligned with the stellar rotation axis (sky-projected obliquity angle λ = 3 ± 5 degrees). Variations in the radial-velocity measurements are likely the result of magnetic activity over a 12-d stellar rotation period. WASP-166b appears to be a rare object within the “Neptune desert”.
Hellier , C , Triaud , A H M J , Bouchy , F , Burdanov , A , Cameron , A C , Delrez , L , Ehrenreich , D , Gillon , M , Jehin , E , Lendl , M , Linder , E , Nielsen , L D , Maxted , P F L , Pepe , F , Pollacco , D , Queloz , D , Ségransan , D , Smalley , B , Spake , J J , Temple , L Y , Udry , S , West , R G & Wyttenbach , A 2019 , ' WASP-166b : a bloated super-Neptune transiting a V = 9 star ' , Monthly Notices of the Royal Astronomical Society , vol. 488 , no. 3 , pp. 3067-3075 . https://doi.org/10.1093/mnras/stz1903
Monthly Notices of the Royal Astronomical Society
Copyright © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1093/mnras/stz1903
DescriptionACC acknowledges support from STFC consolidated grant number ST/R000824/1.
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