HAT-P-49b: A 1.7 M J Planet Transiting a Bright 1.5 M ⊙ F-star

We report the discovery of the transiting extrasolar planet HAT-P-49b. The planet transits the bright (V = 10.3) slightly evolved F-star HD 340099 with a mass of 1.54 M _⊙ and a radius of 1.83 R _⊙. HAT-P-49b is orbiting one of the 25 brightest stars to host a transiting planet which makes this a favorable candidate for detailed follow-up. This system is an especially strong target for Rossiter-McLaughlin follow-up due to the host star's fast rotation, 16 km s^-1. The planetary companion has a period of 2.6915 days, mass of 1.73 M _J, and radius of 1.41 R _J. The planetary characteristics are consistent with that of a classical hot Jupiter but we note that this is the fourth most massive star to host a transiting planet with both M_p and R_p well determined.

Based on observations obtained with the Hungarian-made Automated Telescope Network. Based in part on observations obtained with the Tillinghast Reflector 1.5 m telescope and the 1.2 m telescope, both operated by the Smithsonian Astrophysical Observatory at the Fred Lawrence Whipple Observatory in Arizona. Based in part on radial velocities obtained with the SOPHIE spectrograph mounted on the 1.93 m telescope at Observatoire de Haute Provence, France.