WASP-166b: a bloated super-Neptune transiting a V = 9 star
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 λ = 3 ± 5 deg). 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'.
- Publication:
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Monthly Notices of the Royal Astronomical Society
- Pub Date:
- September 2019
- DOI:
- arXiv:
- arXiv:1811.05292
- Bibcode:
- 2019MNRAS.488.3067H
- Keywords:
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- stars: individual: (WASP-166);
- Astrophysics - Earth and Planetary Astrophysics
- E-Print:
- Accepted by MNRAS