We analyze TESS photometry of DMPP-1 (HD 38677; TIC 66560666), a nearby F8V star hosting hot super-Earth planets and a warm Neptune. Using the Transit Least Squares algorithm and other methods we find a transit signal at ##IMG## [http://ej.iop.org/images/2041-8205/895/1/L17/apjlab8f2bieqn1.gif] {$P={3.2854}_{-0.0025}^{+0.0032}$} days with depth ##IMG## [http://ej.iop.org/images/2041-8205/895/1/L17/apjlab8f2bieqn2.gif] {${87}_{-30}^{+25}$} ppm and false alarm probability 1.6%. This is shallower than hitherto published TESS discoveries. The 3.285 day signal is recovered for several, but not all, methods for detrending stellar astrophysical variability. Further observations are needed to improve the significance of the detection. If this transit were due to an Earth-like rocky planet it would have been detected in the RV data, but it is not. The TESS data cover seven individual transits, one of which is consistent with zero depth. The ins...

中文翻译：

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邻近多行星系统DMPP-1中可能分解的系外行星的过境

我们分析了DMPP-1（HD 38677; TIC 66560666）的TESS光度法，DMPP-1是附近的F8V恒星，拥有热的超地球行星和温暖的海王星。使用过境最小二乘算法和其他方法，我们在## IMG ## [http://ej.iop.org/images/2041-8205/895/1/L17/apjlab8f2bieqn1.gif] {$ P = {3.2854} _ {-0.0025} ^ {+ 0.0032} $}天，深度为## IMG ## [http://ej.iop.org/images/2041-8205/895/1/L17/apjlab8f2bieqn2.gif ] {$ {87} _ {-30} ^ {+ 25} $} ppm和误报概率为1.6％。这比迄今出版的TESS发现要浅。几种但不是全部的方法都可以恢复3.285天的信号，该方法用于消除恒星天体物理变异性的趋势。需要进一步观察以提高检测的重要性。如果这次过境是由类似地球的岩石行星造成的，则可以在RV数据中检测到，但事实并非如此。TESS数据涵盖了七个单独的运输，其中之一与零深度一致。该ins ...