WASP-166b: a bloated super-Neptune transiting a V = 9 star

Coel Hellier; D. R. Anderson; A. H. M. J. Triaud; F. Bouchy; A. Burdanov; A. Collier Cameron; L. Delrez; D. Ehrenreich; M. Gillon; E. Jehin; M. Lendl; E. Linder; L. D. Nielsen; P. F. L. Maxted; F. Pepe; D. Pollacco; D. Queloz; D. Segransan; B. Smalley; J. J. Spake; L. Y. Temple; S. Udry; R. G. West; A. Wyttenbach

doi:10.1093/mnras/stz1903

WASP-166b: a bloated super-Neptune transiting a V = 9 star

Earth and Planetary Astrophysics 2019-07-17 v2

Authors: Coel Hellier , D. R. Anderson , A. H. M. J. Triaud , F. Bouchy , A. Burdanov , A. Collier Cameron , L. Delrez , D. Ehrenreich , M. Gillon , E. Jehin , M. Lendl , E. Linder , L. D. Nielsen , P. F. L. Maxted , F. Pepe , D. Pollacco , D. Queloz , D. Segransan , B. Smalley , J. J. Spake , L. Y. Temple , S. Udry , R. G. West , A. Wyttenbach

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Abstract

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 lambda = 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''.

Keywords

exoplanet transit super-neptune wasp-166b neptune desert radial velocity stellar rotation

Cite

@article{arxiv.1811.05292,
  title  = {WASP-166b: a bloated super-Neptune transiting a V = 9 star},
  author = {Coel Hellier and D. R. Anderson and A. H. M. J. Triaud and F. Bouchy and A. Burdanov and A. Collier Cameron and L. Delrez and D. Ehrenreich and M. Gillon and E. Jehin and M. Lendl and E. Linder and L. D. Nielsen and P. F. L. Maxted and F. Pepe and D. Pollacco and D. Queloz and D. Segransan and B. Smalley and J. J. Spake and L. Y. Temple and S. Udry and R. G. West and A. Wyttenbach},
  journal= {arXiv preprint arXiv:1811.05292},
  year   = {2019}
}

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Accepted by MNRAS

WASP-166b: a bloated super-Neptune transiting a V = 9 star

Abstract

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