Discovery of WASP-174b: Doppler tomography of a near-grazing transit

Maxted; Hellier; Smalley

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 ? = 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.

Citation

Maxted, Hellier, & Smalley. (2018). Discovery of WASP-174b: Doppler tomography of a near-grazing transit. Monthly Notices of the Royal Astronomical Society, 5307-5313. https://doi.org/10.1093/mnras/sty2197

• Acceptance Date: Feb 1, 2018
• Publication Date: Nov 11, 2018
• Journal: Monthly Notices of the Royal Astronomical Society
• Print ISSN: 0035-8711
• Publisher: Oxford University Press
• Pages: 5307-5313
• DOI: https://doi.org/10.1093/mnras/sty2197
• Keywords: astrophysics
• Publisher URL: http://doi.org/10.1093/mnras/sty2197