A SUPER-EARTH-SIZED PLANET ORBITING IN OR NEAR THE HABITABLE ZONE AROUND A SUN-LIKE STAR
A SUPER-EARTH-SIZED PLANET ORBITING IN OR NEAR THE HABITABLE ZONE AROUND A SUN-LIKE STAR
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一颗超地球大小的行星，在类太阳恒星的宜居带内或附近运行
DOI：
10.1088/0004-637x/768/2/101
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
S. Thompson
中科院分区：
文献类型：
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作者：
T. Barclay;C. Burke;S. Howell;J. Rowe;D. Huber;H. Isaacson;J. Jenkins;R. Kolbl;G. Marcy;E. Quintana;M. Still;J. Twicken;S. Bryson;W. Borucki;D. Caldwell;D. Ciardi;B. Clarke;J. Christiansen;J. Coughlin;D. Fischer;J. Li;M. Haas;R. Hunter;J. Lissauer;F. Mullally;Anima Sabale;S. Seader;Jeffrey C. Smith;P. Tenenbaum;A. K. Uddin;S. Thompson
我们提出在类太阳星星的可居住区内或附近发现一颗超级地球大小的行星。它的宿主是开普勒69，一颗13.7等的G4 V型星星。我们检测到两组周期性的过境信号在3年的流量时间序列的开普勒-69，获得与开普勒航天器。使用非常高精度的开普勒测光和后续观测，我们认为这些信号代表行星凌日的置信度> 99.3%。内侧行星开普勒69 b的半径为R，每13.7天绕主星星一周。外行星开普勒-69 c是一个超级地球大小的天体，半径为R，轨道周期为242.5天。假设开普勒69 c是一颗类似地球的邦德星，它的平衡温度为299 ± 19 K，这使它接近主星星周围的宜居带。这是开普勒发现的在类太阳星星的宜居带内或附近运行的最小行星，代表着在寻找第一个真正的地球类似物的道路上迈出的重要一步。
We present the discovery of a super-Earth-sized planet in or near the habitable zone of a Sun-like star. The host is Kepler-69, a 13.7 mag G4V-type star. We detect two periodic sets of transit signals in the 3-year flux time series of Kepler-69, obtained with the Kepler spacecraft. Using the very high precision Kepler photometry, and follow-up observations, our confidence that these signals represent planetary transits is >99.3%. The inner planet, Kepler-69b, has a radius of R⊕ and orbits the host star every 13.7 days. The outer planet, Kepler-69c, is a super-Earth-sized object with a radius of R⊕ and an orbital period of 242.5 days. Assuming an Earth-like Bond albedo, Kepler-69c has an equilibrium temperature of 299 ± 19 K, which places the planet close to the habitable zone around the host star. This is the smallest planet found by Kepler to be orbiting in or near the habitable zone of a Sun-like star and represents an important step on the path to finding the first true Earth analog.