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 Mp and Rp well determined.
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机译：我们报告发现了太阳系外行星HAT-P-49b的发现。行星经过质量为1.54 M☉，半径为1.83？R slightly的明亮（V = 10.3）略微演化的F-star HD 340099。 HAT-P-49b环绕着25个最明亮的恒星之一运行，以承载一颗正在过渡的行星，这使其成为详细随访的有利之选。由于主恒星以16 km s-1的速度快速旋转，因此该系统是Rossiter-McLaughlin跟踪的特别强的目标。行星伴星的周期为2.6915天，质量为1.73兆焦耳，半径为1.41焦耳焦耳。行星特征与经典的热木星一致，但我们注意到，这是第四颗最大的恒星Mp和Rp都确定的过渡行星。
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