We present a new analysis of the light curve of the young planet-hosting star TOI 451 in the light of new observations from TESS Cycle 3. Our joint analysis of the transits of all three planets, using all available TESS data, results in an improved ephemeris for TOI 451 b and TOI 451 c, which will help to plan follow-up observations. The updated mid-transit times are BJD–2,457,000 =  , , and for TOI 451 b, c, and d, respectively, and the periods are , , and days. We also model the out-of-transit light curve using a Gaussian Process with a quasi-periodic kernel, and infer a change in the properties of the active regions on the surface of TOI 451 between TESS Cycles 1 and 3.

我们根据 TESS 周期 3 的新观测，对年轻行星宿主恒星 TOI 451 的光变曲线进行了新的分析。我们使用所有可用的 TESS 数据对所有三颗行星的凌日进行了联合分析，结果得到了改进TOI 451 b 和 TOI 451 c 的星历，这将有助于计划后续观察。更新的中间渡越时间是BJD-2457000 =  ，和用于TOI 451 B，C，和d，分别与周期是，，和天。我们还使用具有准周期内核的高斯过程对越界光曲线进行建模，并推断在 TESS 周期 1 和 3 之间 TOI 451 表面上的活性区域的特性变化。