182 citations · 321 across the 19 of their papers we have counts for
19 papers
The particle acceleration study in blazar jet
Hubing Xiao, Wenxin Yang, Yutao Zhang +4
The particle acceleration of blazar jets is crucial to high-energy astrophysics, yet the acceleration mechanism division in blazar subclasses and the underlying nature of these mec…
Identification of 4FGL uncertain sources at Higher Resolutions with Inverse Discrete Wavelet Transform
Haitao Cao, Hubing Xiao, Zhijian Luo +2
In the forthcoming era of big astronomical data, it is a burden to find out target sources from ground-based and space-based telescopes. Although Machine Learning (ML) methods have…
GeV Variability Properties of TeV Blazars Detected by Fermi-LAT
Gege Wang, Hubing Xiao, Junhui Fan +1
Variability is a prominent observational feature of blazars. The high-energy radiation mechanism of jets has always been important but still unclear. In this work, we performed a d…
Characterizing the emission region property of blazars
Junhui Fan, Hubing Xiao, Wenxin Yang +4
The studies and constraints on the emission region are crucial to the blazar radiation mechanism. Yet the previous works mainly focus on individual sources. In this work, we make u…
The `blazar sequence' in TeV band
Zhihao Ouyang, Hubing Xiao, Jianzhen Chen +7
The `blazar sequence' has been proposed for more than 20 years, yet its nature is still unclear. In this work, for the first time, we expand this topic to the TeV band by using a s…
Variability and Spectral Behavior of Gamma-ray Flares of 3C 279
Gege Wang, Junhui Fan, Hubing Xiao +1
3C 279 showed enhanced flux variations in Fermi-LAT γ-ray observations from January to June 2018. We present a detailed Fermi-LAT analysis to investigate the variability and spectr…
The Classification of Blazars Candidates of Uncertain Types
Jun-Hui Fan, Ke-Yin Chen, Hu-Bing Xiao +6
In this work, the support vector machine (SVM) method is adopted to separate BL Lacertae objects (BL Lacs) and flat spectrum radio quasars (FSRQs) in the plots of photon spectrum i…
An extensive study of blazar broad emission line: Changing-look blazars and Baldwin effect
Hubing Xiao, Junhui Fan, Zhihao Ouyang +4
It is known that the blazar jet emissions are dominated by non-thermal radiation while the accretion disk jets are normally dominated by thermal emission. In this work, our aim is…
The 2175 Å~ Bump Features in FeLoBAL Quasars: One Indicator of MW-like Dust in the Nuclear Region of Quasar
Shaohua Zhang, Jian Ge, Tuo Ji +8
To investigate the properties of dust in the nuclear region of quasars, we explored the extinction curves of the iron low-ionization broad absorption line (FeLoBAL) quasar SDSS J16…
The radio dichotomy of active galactic nuclei
Hubing Xiao, Jingtian Zhu, Liping Fu +2
The question of radio dichotomy in the active galactic nuclei (AGNs) is still in debate even it has been proposed for more than forty years. In order to solve the old riddle, we co…
The relativistic jet and its central engine of blazars
Hubing Xiao, Zhihao OuYang, Lixia Zhang +4
Jet origination is one of the most important questions of AGN, yet it stays obscure. In this work, we made use of information of emission lines, spectral energy distributions (SEDs…
The physical properties of -ray quiet flat-spectrum radio quasars: why are they undetected by -LAT?
Xue-Jiao Deng, Rui Xue, Ze-Rui Wang +4
During a decade of the -Large Area Telescope (LAT) operation, thousands of blazars have been detected in the -ray band. However, there are still numbers of blazars that h…
Efficient Fermi Source Identification with Machine Learning Methods
Hubing Xiao, Haitao Cao, Junhui Fan +3
In this work, Machine Learning (ML) methods are used to efficiently identify the unassociated sources and the Blazar Candidate of Uncertain types (BCUs) in the Fermi-LAT Third Sour…
Further evidences of superluminal AGNs as -ray sources
Hubing Xiao, Junhui Fan, Riccardo Rando +2
In our previous work in Xiao et al. (2019), we suggested that 6 superluminal sources could be gamma-ray candidates, and in fact 5 of them have been confirmed in the fourth Fermi-LA…
Radio core dominance of Fermi-LAT selected AGNs
Zhi-Yuan Pei, Jun-Hui Fan, Denis Bastieri +2
Aims. We present a sample of 4388 AGNs with available radio core-dominance parameters defined as the ratio of the core flux densities to extended ones, namely, R = Score/Sext., whi…
Comparison between Detected and non- Detected Superluminal Sources
Hubing Xiao, Junhui Fan, Jianghe Yang +8
Active galactic nuclei (AGNs) have been attracting research attention due to their special observable properties. Specifically, a majority of AGNs are detected by Fermi-LAT mission…
Optical monitoring of BL Lac object S5 0716+714 and FSRQ 3C273 from 2000 to 2014
Yu-Hai Yuan, Jun-hui Fan, Jun Tao +5
Using the 1.56m telescope at the Shanghai Observatory (ShAO), China, we monitored two sources, BL Lac object S5 0716+714 and Flat Spectrum Radio Quasar (FSRQ) 3C 273. For S5 0716+7…
The Intrinsic -ray Emissions of Blazars
C. Lin, J. H. Fan, H. B. Xiao
Beaming effect is important for the observational properties of blazars. In this work, we collect 91 blazars with available radio Doppler factors. -ray Doppler factors a…
The Spectral Energy Distributions of Fermi Blazars
J. H. Fan, J. H. Yang, Y. Liu +7
(Abridged) In this paper, multi-wavelength data are compiled for a sample of 1425 Fermi blazars to calculate their spectral energy distributions (SEDs). A parabolic function, $\log…