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2013-04-27
Kepler-62: A five-planet system with planets of 1.4 and 1.6 Earth radii in the Habitable Zone
W. J. BoruckiE. AgolF. FressinL. KalteneggerJ. RoweH. IsaacsonD. FischerN. BatalhaJ. J. LissauerG. W. MarcyD. FabryckyJ. -M. DésertS. T. BrysonT. BarclayF. BastienA. BossE. BrugamyerL. A. BuchhaveChris BurkeD. A. CaldwellJ. CarterD. CharbonneauJ. R. CreppJ. Christensen-DalsgaardJ. L. ChristiansenD. CiardiW. D. CochranE. DeVoreL. DoyleA. K. DupreeM. EndlM. E. EverettE. B. FordJ. FortneyT. N. Gautier IIIJ. C. GearyA. GouldM. HaasC. HenzeA. W. HowardS. B. HowellD. HuberJ. M. JenkinsH. KjeldsenR. KolblJ. KolodziejczakD. W. LathamB. L. LeeE. LopezF. MullallyJ. A. OroszA. PrsaE. V. QuintanaR. Sanchez-OjedaD. SasselovS. SeaderA. ShporerJ. H. SteffenM. StillP. TenenbaumS. E. ThompsonG. TorresJ. D. TwickenW. F. WelshJ. N. Winn
文献摘要
We present the detection of five planets – Kepler-62b, c, d, e, and f – of size 1.31, 0.54, 1.95, 1.61 and 1.41 Earth radii, orbiting a K2V star at periods of 5.7, 12.4, 18.2, 122.4 and 267.3 days, respectively. The outermost planets (Kepler-62e & -62f) are super-Earth-size (1.25 < planet radius/earth radius < 2.0) planets in the habitable zone (HZ) of their host star, receiving 1.2 ± 0.2 and 0.41 ± 0.05 times the solar flux at Earth’s orbit. Theoretical models of Kepler-62e and -62f for a stellar age of ~7 Gyr suggest that both planets could be solid: either with a rocky composition or composed of mostly solid water in their bulk.
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