Discovery of WASP-174b: Doppler tomography of a near-grazing transit
Abstract
We report the discovery and tomographic detection of WASP-174b, a planet with a near-grazing transit on a 4.23-d orbit around a V= 11.9, F6V star with [Fe/H] = 0.09 ± 0.09. The planet is in a moderately misaligned orbit with a sky-projected spin-orbit angle of λ = 31° ± 1°. This is in agreement with the known tendency for orbits around hotter stars to be misaligned. Owing to the grazing transit, the planet's radius is uncertain with a possible range of 0.8-1.8 RJup. The planet's mass has an upper limit of 1.3 MJup. WASP-174 is the faintest hot-Jupiter system so far confirmed by tomographic means.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- November 2018
- DOI:
- 10.1093/mnras/sty2197
- arXiv:
- arXiv:1802.00766
- Bibcode:
- 2018MNRAS.480.5307T
- Keywords:
-
- techniques: photometric;
- techniques: spectroscopic;
- planetary systems;
- stars: rotation;
- Astrophysics - Earth and Planetary Astrophysics
- E-Print:
- 8 pages, 6 figures, accepted by MNRAS