6 papers
Spectral Variations of -rays in Mrk 421
Rui-Qi Huang, Xin-Ke Hu, Yu-Wei Yu +2
We present a comprehensive analysis of the 17-year Fermi-LAT observational data of Mrk 421 to investigate the spectral variations in the -ray bands. The light curve of the sour…
Properties and Possible Physical Origins of -ray Emission in Extreme Synchrotron Blazars
Ji-Shun Lian, Jia-Xuan Li, Ze-Rui Wang +3
Extreme synchrotron blazars, characterized by a first peak in their broadband spectral energy distributions (SEDs) at frequencies exceeding Hz, often exhibit a second pea…
Hard X-ray view of two -ray detected low-luminosity active galactic nuclei: NGC 315 and NGC 4261
Yuwei Yu, Jin Zhang
Aims. The accretion disk of low-luminosity active galactic nuclei (LLAGNs) is a radiatively inefficient accretion flow (RIAF). Our goal is to find evidence of RIAF radiation from L…
Hadronic Processes in Advection-Dominated Accretion Flow as the Origin of TeV Excesses in BL Lac Objects
Ji-Shun Lian, Ze-Rui Wang, Jin Zhang
The spectral energy distributions (SEDs) of certain BL Lac objects (BL Lacs) exhibit an additional hard -ray component in the TeV energy range that surpasses the predictions of…
Two-Component gamma-ray Emission Spectrum and X-Ray Polarization of the Radio Galaxy Pictor A
Jia-Xuan Li, Xin-Ke Hu, Ji-Shun Lian +6
Pictor A is a -ray emitting radio galaxy and has a bright hotspot called WHS, located 4 arcmin away from the nucleus. In this work, we present an analysis of its 16-year…
X-ray Emission Properties of a Compact Symmetric Object Sample
Ying-Ying Gan, Su Yao, Tan-Zheng Wu +2
We present a comprehensive analysis of the X-ray observations obtained from \xmm\, and \chandra\, for a sample of bona-fide Compact Symmetric Objects (CSOs) to investigate their X-…