论文标题
卡塔尔1B外行星是否存在过境时序变化？
Are There Transit Timing Variations for the Exoplanet Qatar-1b ?
论文作者
论文摘要
关于外部卡塔尔-1B是否存在任何过境时序变化（TTV）的不安结论，提出了10个新的过境光曲线，并且进行了1400个时期的TTV分析。由于线性模型可提供良好的拟合，并减少了卡方= 2.59，并且可能的TTV频率的错误警报概率高达35％，因此我们的结果与NULL-TTV模型一致。然而，获得了参考时间T_0 = 2455647.63360 \ pm 0.00008（BJD）和周期p = 1.4200236 \ pm 0.0000001（Day）的新新世纪。此外，还提供了恒星半径单位的更新的轨道半肌轴和行星半径，还确定了改良的恒星潮汐质量因子的下限。
Motivated by the unsettled conclusion on whether there are any transit timing variations (TTVs) for the exoplanet Qatar-1b, 10 new transit light curves are presented and the TTV analysis with a baseline of 1400 epochs are performed. Because the linear model provides a good fitting with reduced chi-square = 2.59 and the false-alarm probabilities of possible TTV frequencies are as large as 35 %, our results are consistent with a null-TTV model. Nevertheless, a new ephemeris with the reference time T_0 = 2455647.63360\pm 0.00008 (BJD) and the period P= 1.4200236\pm 0.0000001 (day) is obtained. In addition, the updated orbital semi-major axis and planetary radius in unit of stellar radius are being provided, and the lower limit of modified stellar tidal quality factor is also determined.
