活动星系核中的准周期振荡现象

In recent years, many cases of the quasi-periodic oscillation penomenon have been discovered in the light curves of active galactic nuclei, and the study may provide a particularly useful way to explore the physics of the supermassive black holes in the center. We collect these reported quasi-periodic oscillation cases in different bands, and summarize them in this paper. Based on the collected cases, we discuss their overall characteristics, among which the detected periods have a strong observational selection effect and there are few cases with high significance so far. We briefly discuss the mechanisms for producing quasi-periodic oscillations currently under consideration, most of which are related to the Lenense -Thirring effect or binary nature of the central black hole systems. We believe that a large number of quasi-periodic oscillations will be discovered in the near future with the launch of various large-survey programs at different wavelength bands.