WASP-103 b: a new planet at the edge of tidal disruption

Gillon, M.; Anderson, D.R.; Collier-Cameron, A.; Delrez, L.; Hellier, C.; Jehin, E.; Lendl, M.; Maxted, P.F.L.; Pepe, F.; Pollacco, D.; Queloz, D.; Ségransan, D.; Smith, A.M.S.; Smalley, B.; Southworth, J.; Triaud, A.H.M.J.; Udry, S.; Van Grootel, V.; West, R.G.

Abstract

We report the discovery of WASP-103?b, a new ultra-short-period planet (P = 22.2 h) transiting a 12.1 V-magnitude F8-type main-sequence star (1.22 ± 0.04 M?, 1.44-0.03+0.05 R?, Teff = 6110 ± 160 K). WASP-103?b is significantly more massive (1.49 ± 0.09 MJup) and larger (1.53-0.07+0.05 RJup) than Jupiter. Its large size and extreme irradiation (~ 9 × 109 erg?s-1?cm-2) make it an exquisite target for a thorough atmospheric characterization with existing facilities. Furthermore, its orbital distance is less than 20% larger than its Roche radius, meaning that it might be significantly distorted by tides and might experience mass loss through Roche-lobe overflow. It thus represents a new key object for understanding the last stage of the tidal evolution of hot Jupiters.

Citation

Gillon, M., Anderson, D., Collier-Cameron, A., Delrez, L., Hellier, C., Jehin, E., …West, R. (2014). WASP-103 b: a new planet at the edge of tidal disruption. Astronomy & Astrophysics, 562, Article L3. https://doi.org/10.1051/0004-6361/201323014

• Journal Article Type: Article
• Acceptance Date: Jan 9, 2014
• Publication Date: Feb 5, 2014
• Journal: Astronomy & Astrophysics
• Print ISSN: 0004-6361
• Publisher: EDP Sciences
• Peer Reviewed: Peer Reviewed
• Volume: 562
• Article Number: L3
• DOI: https://doi.org/10.1051/0004-6361/201323014
• Keywords: planetary systems; WASP-103; photometric; radial velocities; spectroscopic
• Publisher URL: https://doi.org/10.1051/0004-6361/201323014