已确认行星齿轮K2-78b、K2-82b和K2-92b的不合格
Disproval of the validated planets K2-78b, K2-82b, and K2-92b
摘要：
在短轨道周期内围绕明亮恒星运行的凌日超级地球是研究行星大气的有趣目标。在K2探测到的一系列确认和验证的系外行星中选择适合从地面进一步表征的超级地球时，我们发现了一些可疑的情况，导致我们重新评估探测到的凌日信号的性质。对K2光变曲线和光度重心的质心运动进行了光度分析。我们的研究表明，被确认的行星K2- 78 b、K2- 82 b和K2- 92 b实际上不是行星，而是背景食双星。食双星在开普勒测光孔径之内，但在用于验证的地面高分辨率图像之外。我们建议在验证太空任务发现的候选行星时要格外小心。重要的是，验证过程中的所有假设都要仔细检查。必须进行独立确认，以避免浪费宝贵的资源对不存在的目标进行进一步定性。
英文摘要：
Transiting super-Earths orbiting bright stars in short orbital periods are interesting targets for the study of planetary atmospheres. While selecting super-Earths suitable for further characterization from the ground among a list of confirmed and validated exoplanets detected by K2, we found some suspicious cases that led to us re-assessing the nature of the detected transiting signal. We did a photometric analysis of the K2 light curves and centroid motions of the photometric barycenters. Our study shows that the validated planets K2-78b, K2-82b, and K2-92b are actually not planets but background eclipsing binaries. The eclipsing binaries are inside the Kepler photometric aperture, but outside the ground-based high resolution images used for validation. We advise extreme care on the validation of candidate planets discovered by space missions. It is important that all the assumptions in the validation process are carefully checked. An independent confirmation is mandatory in order to avoid wasting valuable resources on further characterization of non-existent targets.
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