HAT-P-50b, HAT-P-51b, HAT-P-52b, AND HAT-P-53b: THREE TRANSITING HOT JUPITERS AND A TRANSITING HOT SATURN FROM THE HATNET SURVEY*

摘要

We report the discovery and characterization of four transiting exoplanets by the HATNet survey. The planet HAT-P-50b has a mass of and radius of , and orbits a bright ( mag) , star every days. The planet HAT-P-51b has a mass of and radius of , and orbits a mag, , star with a period of days. The planet HAT-P-52b has a mass of and radius of , and orbits a mag, , star with a period of days. The planet HAT-P-53b has a mass of and radius of , and orbits a mag, , star with a period of days. All four planets are consistent with having circular orbits and have masses and radii measured to better than 10% precision. The low stellar jitter and favorable / ratio for HAT-P-51 make it a promising target for measuring the Rossiter–McLaughlin effect for a Saturn-mass planet.