Discovery of WASP-174b: Doppler tomography of a near-grazing transit. Issue 4 (13th August 2018)

• Record Type: Journal Article
• Authors: Temple, L Y; Hellier, C; Almleaky, Y; Anderson, D R; Bouchy, F; Brown, D J A; Burdanov, A; Cameron, Collier; Delrez, L; Gillon, M; Hall, R; Jehin, E; Lendl, M; Maxted, P F L; Nielsen, L D; Pepe, F; Pollacco, D; Queloz, D; Ségransan, D; Smalley, B; Sohy, S; Thompson, S; Triaud, A H M J; Turner, O D; Udry, S; West, R G
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 480:Issue 4(2018)
• Page Start: 5307
• Page End: 5313
• Publication Date: 2018-08-13
• Subjects: techniques: photometric -- techniques: spectroscopic -- planetary systems -- stars: rotation; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/sty2197
• Languages: English
• ISSNs: 0035-8711

Abstract

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.