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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.


M. Gillon

D.R. Anderson

A. Collier-Cameron

L. Delrez

C. Hellier

E. Jehin

M. Lendl

P.F.L. Maxted

F. Pepe

D. Pollacco

D. Queloz

D. Ségransan

A.M.S. Smith

A.H.M.J. Triaud

S. Udry

V. Van Grootel

R.G. West


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.

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
Keywords planetary systems; WASP-103; photometric; radial velocities; spectroscopic
Publisher URL