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

Maxted; Hellier; Smalley

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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.

Acceptance Date Feb 1, 2018
Publication Date Nov 11, 2018
Publicly Available Date Mar 28, 2024
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

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