3 papers
astro-ph.HE2026
Gaussian-process evidence for a stochastic-variability transition in the recovering corona of 1ES 1927+654
Lijuan Dong, Dahai Yan
We investigate the stochastic X-ray variability of the changing-look active galactic nucleus 1ES 1927+654 during its 2018--2024 evolution, focusing on the recovery of the X-ray cor…
astro-ph.HE2026
Gaussian Process Inference of Stochastic Magneto-Active Dynamics and Viscosity in Swift J1727.8-1613
Lijuan Dong, Dahai Yan, Zihan Yang +4
Linking X-ray variability to the underlying magnetohydrodynamic (MHD) dynamics of black hole X-ray binaries remains challenging. We systematically investigate the stochastic and os…
astro-ph.HE2025
Detection of the cosmological evolution of the Doppler factor for blazars jets
Dahai Yan, Haiyun Zhang, Jianeng Zhou +1
The Doppler factor () is a fundamental quality for the relativistic jets from active galactic nuclei (AGNs). It is also fundamental to assessing the number of the entire popula…