WASP-7: A bright transiting-exoplanet system in the Southern Hemisphere

Hellier, Coel; Anderson, D. R.; Gillon, M.; Lister, T. A.; Maxted, P. F. L.; Queloz, D.; Smalley, B.; Triaud, A. H. M. J.; West, R. G.; Wilson, D. M.; Alsubai, K.; Bentley, S. J.; Collier Cameron, A.; Hebb, L.; Horne, K.; Irwin, J.; Kane, S. R.; Mayor, M.; Pepe, F.; Pollacco, D.; Skillen, I.; Udry, S.; Wheatley, P. J.; Christian, D. J.; Enoch, R.; Haswell, C. A.; Joshi, Y. C.; Norton, A. J.; Parley, N.; Ryans, R.; Street, R. A. and Todd, I. (2009). WASP-7: A bright transiting-exoplanet system in the Southern Hemisphere. The Astrophysical Journal, 690 L89-L91.

DOI: https://doi.org/10.1088/0004-637X/690/1/L89

Abstract

We report that a Jupiter-mass planet, WASP-7b, transits the V = 9.5 star HD 197286 every 4.95 d. This is the brightest discovery from the WASP-South transit survey so far and is currently the brightest transiting-exoplanet system in the southern hemisphere. WASP-7b is among the densest of the known Jupiter-mass planets, suggesting that it has a massive core. The planet mass is 0.96+0.12 '0.18 M Jup, the radius is 0.915+0.046 '0.040 R Jup, and the density is 1.26+0.25 '0.21 ?Jup (1.67+0.33 '0.28 g cm–3).

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