54 citations · 128 across the 3 of their papers we have counts for
10 papers
A Quasi-periodic Oscillation in the gamma-ray Emission from the Non-blazar Active Galactic Nucleus PKS 0521-36
Haiyun Zhang, Dahai Yan, Pengfei Zhang +2
Long-term gamma-ray variability of a non-blazar Active Galactic Nucleus (AGN) PKS 0521-36 is investigated by using Fermi-LAT pass 8 data covering from 2008 August to 2021 March. Th…
A Radio Quasi-periodic Oscillation of 176 day in the Radio-loud Narrow-line Seyfert 1 Galaxy J0849+5108
Pengfei Zhang, Zhongxiang Wang
We analyze the 11-year long-term light curve of the Radio-loud Narrow-line Seyfert 1 (NLSy1) galaxy J0849+5108 and the nearly simultaneous -ray data of the source. The data were…
Gaussian Process Modeling -LAT -ray Blazar Variability: A Sample of Blazars with -ray Quasi-periodicities
Shenbang Yang, Dahai Yan, Pengfei Zhang +2
Blazar variability may be driven by stochastic processes. On the other hand, quasi-periodic oscillation (QPO) behaviors are recently reported to be detected in -LAT dat…
Searching for Quasi-Periodic Modulations in -ray Active Galactic Nuclei
Pengfei Zhang, Dahai Yan, Jianeng Zhou +2
We perform a systematic search of quasi-periodic variabilities in -ray active galactic nuclei (AGNs) in the third \emph{Fermi} Large Area Telescope source catalog (3FGL). We emp…
Statistical analysis on X-ray flares from the nucleus and HST-1 knot in the M87 jet
Shenbang Yang, Dahai Yan, Benzhong Dai +4
The statistical properties of X-ray flares from two separate locations (nucleus and HST-1) in the M87 jet are investigated to reveal the physical origin of the flares. We analyse t…
Impact of Plasma Instability on Constraint of the Intergalactic Magnetic Field
Dahai Yan, Jianeng Zhou, Pengfei Zhang +2
A relativistic electron-positron pair beam can be produced in the interaction of TeV photons from a blazar with the extragalactic background light (EBL). The relativistic …