4 papers · 1 filter
Revisiting the X-ray Variability Plane of AGNs: The Significant Role of the Photon Index
Ruisong Xia, Hao Liu, Yongquan Xue +9
X-ray variability provides a powerful probe of the innermost regions of active galactic nuclei (AGNs), offering valuable insights into the accretion process and the structure of th…
First Evidence for a QPO Triplet and Its Relativistic Precession Origin in RE J1034+396
Ruisong Xia, Yongquan Xue, Jialai Wang +1
Quasiperiodic oscillations (QPOs) in active galactic nuclei (AGNs) provide a powerful tool for probing the structure of the innermost accretion flow and corona around supermassive…
Strong Amplitude Modulation of Hard-band X-ray QPO with Soft-band Flux in RE J1034+396
Ruisong Xia, Hao Liu, Yongquan Xue
The X-ray quasi-periodic oscillation (QPO) is a remarkable form of variability in systems of compact object accretion. RE J1034+396, harboring the most significant X-ray QPO in act…
First Observational Evidence for an Interconnected Evolution between Time Lag and QPO Frequency among AGNs
Ruisong Xia, Hao Liu, Yongquan Xue
Quasi-periodic oscillations (QPOs) have been widely observed in black hole X-ray binaries (BHBs), which often exhibit significant X-ray variations. Extensive research has explored…