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arXiv · 1401.2784

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

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. Segransan·A. M. S. Smith·B. Smalley·J. Southworth·A. H. M. J. Triaud·S. Udry·V. Van Grootel·R. G. West
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Abstract

We report the discovery of WASP-103b, a new ultra-short-period planet (P=22.2 hr) transiting a 12.1 V-magnitude F8-type main-sequence star (1.22+-0.04 Msun, 1.44-0.03+0.05 Rsun, Teff = 6110+-160 K). WASP-103b 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 (around 9 10^9 erg/s/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.

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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. Segransan, A. M. S. Smith, B. Smalley, J. Southworth, A. H. M. J. Triaud, S. Udry, V. Van Grootel, R. G. West. 2014-01-13. WASP-103b: a new planet at the edge of tidal disruption. https://doi.org/10.1051/0004-6361/201323014

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