DETECTION OF POTENTIAL TRANSIT SIGNALS IN 17 QUARTERS OF KEPLER DATA: RESULTS OF THE FINAL KEPLER MISSION TRANSITING PLANET SEARCH (DR25)-猫眼课题宝

DOI：

10.3847/0004-6256/152/6/158

发表时间：

2016-04

期刊：

The Astronomical Journal

影响因子：

通讯作者：

中科院分区：

其他

文献类型：

作者：

J. Twicken;J. Jenkins;S. Seader;P. Tenenbaum;Jeffrey C. Smith;L. Brownston;C. Burke;J. Catanzarite;B. Clarke;M. Cote;F. Girouard;T. Klaus;Jie Li;S. McCauliff;R. Morris;B. Wohler;Jennifer Campbell;A. K. Uddin;Khadeejah A. Zamudio;Anima Sabale;S. Bryson;D. Caldwell;J. Christiansen;J. Coughlin;M. Haas;C. Henze;D. Sanderfer;S. Thompson

我们展示了开普勒数据处理管道在完整的17 / 4主要任务数据集中搜索过境行星信号的最终结果。搜索包括总共198,709个恒星目标，其中112,046个是在所有17个季度观测到的，86,663个是在不到17个季度观测到的。我们报告了17,230个目标，其中至少有一个过境签名被识别出符合指定的检测标准：周期性，至少三个观测到的过境事件，检测统计（即信噪比）超过搜索阈值，并通过三个统计过境一致性测试的等级。在将变暗的凌日行星模型拟合到数据中并删除凌日事件后，迭代地搜索确定了凌日信号的光曲线，以寻找额外的特征。对其他行星的搜索增加了16802个凌日信号，总共有34032个；这远远超过了之前管道运行中确定的过境签名数量。在最后的开普勒凌日搜索中，战略重点是完整性，而不是可靠性。将凌日信号与3402个确定的高质量开普勒感兴趣天体进行比较，回收率为99.8%。高回收率必须与大量误报检测进行权衡。我们研究了凌日行星模型所暗示的行星人口的特征，并强调了在其主恒星的可居住区轨道上运行的小行星的探测。

We present results of the final Kepler Data Processing Pipeline search for transiting planet signals in the full 17-quarter primary mission data set. The search includes a total of 198,709 stellar targets, of which 112,046 were observed in all 17 quarters and 86,663 in fewer than 17 quarters. We report on 17,230 targets for which at least one transit signature is identified that meets the specified detection criteria: periodicity, minimum of three observed transit events, detection statistic (i.e., signal-to-noise ratio) in excess of the search threshold, and passing grade on three statistical transit consistency tests. Light curves for which a transit signal is identified are iteratively searched for additional signatures after a limb-darkened transiting planet model is fitted to the data and transit events are removed. The search for additional planets adds 16,802 transit signals for a total of 34,032; this far exceeds the number of transit signatures identified in prior pipeline runs. There was a strategic emphasis on completeness over reliability for the final Kepler transit search. A comparison of the transit signals against a set of 3402 well-established, high-quality Kepler Objects of Interest yields a recovery rate of 99.8%. The high recovery rate must be weighed against a large number of false-alarm detections. We examine characteristics of the planet population implied by the transiting planet model fits with an emphasis on detections that would represent small planets orbiting in the habitable zone of their host stars.

DETECTION OF POTENTIAL TRANSIT SIGNALS IN 17 QUARTERS OF KEPLER DATA: RESULTS OF THE FINAL KEPLER MISSION TRANSITING PLANET SEARCH (DR25)

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