HAT-P-2b: A SUPER-MASSIVE PLANET IN AN ECCENTRIC ORBIT TRANSITING A BRIGHT STAR
نویسندگان
چکیده
We report the discovery of HAT-P-2b, a massive (Mp = 8.17 ± 0.72 MJup) planet transiting the bright (V = 8.7) F8 star HD 147506, with an orbital period of 5.63 days and an eccentricity of e = 0.5. From the transit light curve we determine that the radius of the planet is Rp = 1.18 ± 0.16 RJup. HAT-P-2b has a mass about 9 times the average mass of previously-known transiting exoplanets, and a density of ρp = 6.6 g cm , similar to that of rocky planets like the Earth. Nevertheless, its mass and radius are in accord with theories of structure of massive giant planets composed of pure H and He. The high eccentricity causes a 9-fold variation of insolation of the planet between periand apastron. Subject headings: stars: individual: HD 147506 – planetary systems: individual: HAT-P-2b
منابع مشابه
HD 147506b: A SUPER-MASSIVE PLANET IN AN ECCENTRIC ORBIT TRANSITING A BRIGHT STAR
We report the discovery of a massive (Mp = 9.04±0.50MJup) planet transiting the bright (V = 8.7) F8 star HD 147506, with an orbital period of 5.63341±0.00013 days and an eccentricity of e = 0.520± 0.010. From the transit light curve we determine that the radius of the planet is Rp = 0.982± 0.105RJup. HD 147506b (also coined HAT-P-2b) has a mass about 9 times the average mass of previously-known...
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تاریخ انتشار 2008