开普勒活动星系核的多分量功率密度谱，是仪器的人造物还是物理的起源？
Multicomponent Power Density Spectra of Kepler AGNs, an instrumental artifact or a physical origin?
摘要：
我们分析了四个活动星系核（AGN）从开普勒领域的光变曲线，并发现多分量功率密度谱的特征频率是令人惊讶的相似，其他开普勒AGN（包括ZW 229 -15）。对随机选择的行星候选恒星进行相同的时间序列分析，发现了相同的特征，表明变异性的仪器来源。这一结果是神秘的，因为这些信号已经通过Swift的独立观测得到了证实。基于我们对这些雨燕数据的重新分析和测试模拟，我们现在将开普勒数据中的仪器伪影与雨燕观测中的真实模式区分开来。看来，其他一些活动星系核观测仪器，如XMM-牛顿显示类似的频率成分。这支持了开普勒人工制品和真实Swift特征的可变性时间尺度之间的相似性是巧合的结论。
英文摘要：
We analysed the light curves of four active galactic nuclei (AGN) from the Kepler field, and find multicomponent power density spectra with characteristic frequencies that are surprisingly similar to other Kepler AGNs (including ZW229-15). An identical time series analysis of randomly selected planet candidate stars revealed the same features, suggesting an instrumental origin for the variability. This result is enigmatic, as these signals have been confirmed for ZW229-15 using independent observations from Swift. Based on our re-analysis of these Swift data and test simulations, we now distinguish the instrumental artifact in Kepler data from the real pattern in Swift observations. It appears that some other AGNs observed with instruments such as XMM-Newton show similar frequency components. This supports the conclusion that the similarity between the variability timescales of the Kepler artifact and real Swift features is coincidental.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
