* Astronomy

Title: WASP-71b: a bloated hot Jupiter in an 2.9-day, prograde orbit around an evolved F8 star
Authors: A. M. S. Smith, D. R. Anderson, F. Bouchy, A. Collier Cameron, A. P. Doyle, A. Fumel, M. Gillon, G. Hébrard, C. Hellier, E. Jehin, M. Lendl, P. F. L. Maxted, C. Moutou, F. Pepe, D. Pollacco, D. Queloz, A. Santerne, D. Segransan, B. Smalley, A. H. M . J. Triaud, S. Udry, R. G. West

We report the discovery by the WASP transit survey of a highly-irradiated, massive (2.258 ±0.072 MJup) planet which transits a bright (V = 10.6), evolved F8 star every 2.9 days. The planet, WASP-71b, is larger than Jupiter (1.50 ±0.11 RJup), but less dense (0.67 ±0.14 {rho}Jup). We also report spectroscopic observations made during transit with the CORALIE spectrograph, which allow us to detect the Rossiter-McLaughlin effect. We determine the sky-projected angle between the stellar-spin and planetary-orbit axes to be {\lambda} = 19.8 ±9.9 degrees.

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