论文标题
通过TESS数据重新访问TRE-3和卡塔尔-1系统中的公交定时变化
Revisiting the Transit Timing Variations in the TrES-3 and Qatar-1 systems with TESS data
论文作者
论文摘要
我们提出并分析了TRE-3B和98个Tres-3B和98个Transit光曲线的58透明光曲线，该曲线通过过渡系外行星调查卫星（TESS）以及我们使用地面基于地面的1.23 \，M望远镜观察到的两条Transit Light曲线观察到了卡塔尔-1B的传输光曲线。这些光曲线与从系外行车传输数据库（ETD）和文献中获得的最佳质量光曲线结合在一起。从这些光曲线中精确确定的中途时间，使我们能够获得两种热木星的精确精度的精制轨道胚膜。从定时分析中，我们可以发现两个系统中存在过境时序变化（TTV）的指示。由于观察到的TTV不太可能是短期和周期性的，因此排除了接近TRES-3B和卡塔尔-1B的轨道中其他行星的可能性。还检查了长期TTV的可能原因，例如轨道衰减，Apsidal进动，Applegate机制和视线加速度。但是，没有发现这些可能性解释了观察到的TRE-3B的TTV。与此相反，视线加速度似乎是观察到的卡塔尔-1B TTV的合理解释。为了确认这些发现，对这两个系统的进一步高精度过境和RV观测值是值得的。
We present and analyze 58 transit light curves of TrES-3b and 98 transit light curves of Qatar-1b observed by Transiting Exoplanet Survey Satellite (TESS), plus two transit light curves of Qatar-1b observed by us using a ground-based 1.23\,m telescope. These light curves are combined with the best-quality light curves taken from the Exoplanet Transit Database (ETD) and literature. The precisely determined mid-transit times from these light curves enable us to obtain the refined orbital ephemerides with improved precision for both hot Jupiters. From the timing analysis, we find an indication for the presence of transit timing variations (TTVs) in both systems. Since the observed TTVs are unlikely to be short-term and periodic, the possibility of additional planets in the orbits close to TrES-3b and Qatar-1b are ruled out. Possible causes of long-term TTVs such as orbital decay, apsidal precession, the Applegate mechanism and line-of-sight acceleration are also examined. However, none of these possibilities are found to explain the observed TTV of TrES-3b. In contrast to this, the line-of-sight acceleration appears to be a plausible explanation for the observed TTV of Qatar-1b. In order to confirm these findings, further high-precision transit and RV observations of both systems would be worthwhile.
