TRANSITING PLANET CANDIDATES BEYOND THE SNOW LINE DETECTED BY VISUAL INSPECTION OF 7557 KEPLER OBJECTS OF INTEREST
TRANSITING PLANET CANDIDATES BEYOND THE SNOW LINE DETECTED BY VISUAL INSPECTION OF 7557 KEPLER OBJECTS OF INTEREST
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DOI：
10.3847/0004-637x/822/1/2
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发表时间：
2016-02
期刊：
影响因子：
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通讯作者：
S. Uehara;H. Kawahara;K. Masuda;S. Yamada;M. Aizawa
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文献类型：
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作者：
S. Uehara;H. Kawahara;K. Masuda;S. Yamada;M. Aizawa
我们目测了7557个开普勒感兴趣天体(KOI)的光曲线，以寻找可能由长周期巨行星引起的单次凌日事件(STE)。我们在24个KOI中鉴定了28个STE，其中有14个是本文新报道的事件。我们通过与系统中其他行星的凌日同时拟合STE光曲线或利用关于主星密度的先验信息来估计引起STE的天体的半径和轨道周期。结果，我们发现其中七个系统中的STE与海王星到木星大小的轨道周期从几年到∼20年的天体是一致的。我们还估计，假设内外行星轨道之间的相互倾角较小，≳20%的致密多凌日系统拥有周期为≳3年的冷巨行星，其基础是它们出现在具有多个候选的KOI中。
We visually inspected the light curves of 7557 Kepler Objects of Interest (KOIs) to search for single transit events (STEs) that were possibly due to long-period giant planets. We identified 28 STEs in 24 KOIs, among which 14 events are newly reported in this paper. We estimate the radius and orbital period of the objects causing STEs by fitting the STE light curves simultaneously with the transits of the other planets in the system or with prior information on the host star density. As a result, we found that STEs in seven of those systems are consistent with Neptune- to Jupiter-sized objects of orbital periods ranging from a few to ∼ 20 years . We also estimate that ≳ 20 % of the compact multi-transiting systems host cool giant planets with periods ≳ 3 years on the basis of their occurrence in the KOIs with multiple candidates, assuming the small mutual inclination between inner and outer planetary orbits.