AI 中文总结
该研究将T. Holczer等人的TTV统计分析扩展到凌日3-6次的KOIs，识别出6个被遗漏的KOIs，发现短周期行星需更大TTV信号才能被探测，为行星结构建模提供目标。
AI 中文摘要
凌日时间变化（TTVs）是系外行星凌日时观测到的时间与预期时间的偏差。在多行星系统中，显著的TTVs可能表明系统中存在另一颗天体，与凌日系外行星发生引力相互作用。T. Holczer等人（2016年）编目了2599个开普勒感兴趣天体（KOIs），并对至少凌日7次的候选天体的TTVs进行了统计分析。然而，这一保守的凌日次数限制忽略了长周期KOIs。因此，我们将T. Holczer等人（2016年）的统计分析扩展到凌日次数为3至6次的KOIs群体。我们识别出6个KOIs，其中3个具有开普勒编号（Kepler-103 c、Kepler-90 g和Kepler-1662 c），其显著的TTV信号被T. Holczer等人（2016年）最初忽略。此外，我们搜索了具有显著TTVs的KOIs的行星半径和轨道周期相关趋势。通过生存分析，我们确定，无论行星大小如何，轨道周期较短的行星比轨道周期较长的行星需要更大的TTV信号才能被探测到。揭示此类TTV统计趋势将为未来行星结构的正向建模提供目标。
英文摘要
Transit Timing Variations (TTVs) are deviations from the time an observer would expect to see an exoplanet transit its host star. In multi-planetary systems, significant TTVs may indicate the presence of another body in the system gravitationally interacting with the transiting exoplanet. T. Holczer et al. (2016) catalogs 2599 Kepler Objects of Interest (KOIs) and provides a statistical analysis of their TTVs for candidates that have transited at least seven times. However, this conservative limit on the number of transits neglects long-period KOIs. Therefore, we extend the statistical analysis performed by T. Holczer et al. (2016) to the population of KOIs that have between three and six transits. We identify six KOIs, three of which have Kepler names (Kepler-103 c, Kepler-90 g, and Kepler-1662 c), with significant TTV signals that were originally overlooked by T. Holczer et al. (2016). Additionally, we search for trends regarding the planetary radius and orbital period of KOIs with significant TTVs. Through a survival analysis, we determine that planets with shorter orbital periods require larger TTV signals to be detected compared to longer period planets, regardless of planetary size. Uncovering trends in TTV statistics such as this one will provide targets for future forward modeling of planetary architectures.
Comments12 pages, 5 figures, published in AJ
Journal refD'Angiolillo et al., 2026, The Astronomical Journal, Volume 171, Issue 1, id.7, 10 pp
