182 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Guangzhou UniversityCN52 papers
- Chinese Academy of SciencesCN11 papers
- Hunan University of Arts and ScienceCN9 papers
- National Astronomical ObservatoriesCN9 papers
- University of Science and Technology of ChinaCN9 papers
- University of PaduaIT8 papers
- Shanghai Astronomical ObservatoryCN7 papers
- Shanghai Normal UniversityCN7 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di PadovaIT5 papers
- University of Chinese Academy of SciencesCN5 papers
- Kavli Institute for Theoretical SciencesCN4 papers
- Sun Yat-sen UniversityCN4 papers
35 papers · 1 filter
Prospects for probing small-scale dark matter models with pulsars around Sagittarius A*
Zexin Hu, Lijing Shao, Fupeng Zhang
Future observations with next-generation large-area radio telescopes are expected to discover radio pulsars (PSRs) closely orbiting around Sagittarius~A* (Sgr~A*), the supermassive…
The beaming effect for Fermi-LAT-detected FR-I radio galaxies
Xu-Hong Ye, Xiang-Tao Zeng, Dan-Yi Huang +3
Our knowledge of Giga-electron volt (GeV) radio galaxies has been revolutionized by the Fermi-LAT Telescope, which provides an excellent opportunity to study the physical propertie…
Intra-night optical flux and polarization variability of BL~Lacertae during its 2020 2021 high state
Rumen Bachev, Tushar Tripathi, Alok C. Gupta +15
In this work, we report the presence of rapid intra-night optical variations in both -- flux and polarization of the blazar BL Lacertae during its unprecedented 2020--2021 high sta…
Exploring TeV candidates of Fermi blazars through machine learning
J. T. Zhu, C. Lin, H. B. Xiao +3
In this work, we make use of a supervised machine learning algorithm based on Logistic Regression (LR) to select TeV blazar candidates from the 4FGL-DR2 / 4LAC-DR2, 3FHL, 3HSP, and…
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…
Optical flux and spectral variability of BL Lacertae during its historical high outburst in 2020
Nibedita Kalita, Yuhai Yuan, Minfeng Gu +9
BL Lacertae had undergone a series of historical high flux activity over a year, from August 2020 in the optical to VHE -rays. In this paper, we report on optical flux and spect…
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…
A Possible 3-Year Quasi-Periodic Oscillation in γ-Ray Emission from the FSRQ S5 1044+71
G. G. Wang, J. T. Cai, J. H. Fan
Variability is a typical observation feature of Fermi blazars, sometimes it shows quasi-periodic oscillation (QPO). In this work, we obtained 5-day binned light curves (with a time…
The Estimation of Fundamental Physics Parameters for Fermi-LAT Blazars
Zhiyuan Pei, Junhui Fan, Jianghe Yang +2
Aiming to delineate the physical framework of blazars, we present an effective method to estimate four important parameters based on the idea proposed by \citet{BK95}, including th…
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…
X-ray Quasi-periodic Eruptions driven by Star-Disc Collisions : Application to GSN069 and Probing the Spin of Massive Black Holes
Jingtao Xian, Fupeng Zhang, Liming Dou +2
X-ray quasi-periodic eruptions (QPEs) are discovered recently in active galaxies with unknown driven mechanism. Under the assumption that QPEs are caused by star-disc collisions, w…
The Eccentric and Accelerating Stellar Binary Black Hole Mergers in Galactic Nuclei: Observing in Ground and Space Gravitational Wave Observatories
Fupeng Zhang, Xian Chen, Lijing Shao +1
We study the stellar binary black holes (BBHs) inspiralling/merging in galactic nuclei based on our numerical method GNC. We find that of all new born BBHs will finally me…
A broadband radio study of PSR J0250+5854: the slowest-spinning radio pulsar known
C. H. Agar, P. Weltevrede, L. Bondonneau +19
We present radio observations of the most slowly rotating known radio pulsar PSR J0250+5854. With a 23.5 s period, it is close, or even beyond, the - diagram region tho…
AT2019 avd: A tidal disruption event with a two-phase evolution
Jin-Hong Chen, Li-Ming Dou, Rong-Feng Shen
Tidal disruption events (TDEs) can uncover the quiescent supermassive black holes (SMBHs) at the center of galaxies. After the disruption of a star by a SMBH, the highly elliptical…
Beamed and unbeamed emission of -ray blazars
Zhiyuan Pei, Junhui Fan, Jianghe Yang +1
A two-component model of radio emission has been used to explain some radio observational properties of Active Galactic Nuclei (AGNs) and, in particular, of blazars. In this work,…
Years Delayed X-ray Afterglows of TDEs Originated from Wind-Torus Interactions
Guobin Mou, Liming Dou, Ning Jiang +8
Tidal disruption events (TDEs) occurred in active galactic nuclei (AGNs) are a special class of sources with outstanding scientific significance. TDEs can generate ultrafast winds,…
The estimation of -ray Doppler factor for Fermi/LAT-detected blazars
Zhiyuan Pei, Junhui Fan, Jianghe Yang +1
Blazars are a subclass of active galactic nuclei (AGNs) with extreme observation properties, which is caused by the beaming effect, expressed by a Doppler factor, in a relativistic…
Revisiting the Relationship between the Long GRB Rate and Cosmic Star Formation History Based on a Large Swift Sample
Jing-Meng Hao, Liang Cao, You-Jun Lu +4
The exact relationship between the long gamma-ray burst (LGRB) rate and the cosmic star formation rate (CSFR) is essential for using LGRBs as cosmological probes. In this work, we…
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…
Multicolor Optical Monitoring of the Blazar S5 0716+714 from 2017 to 2019
Dingrong Xiong, Jinming Bai, Junhui Fan +7
We continuously monitored the blazar S5 0716+714 in the optical , and bands from Nov. 10, 2017 to Jun. 06, 2019. The total number of observations is 201 nights including…
The UV/optical peak and X-ray brightening in TDE candidate AT2019azh: A case of stream-stream collision and delayed accretion
Xiao-Long Liu, Li-Ming Dou, Jin-Hong Chen +1
We present and analyze the optical/UV and X-ray observations of a nearby tidal disruption event (TDE) candidate AT2019azh, spanning from 30 d before to 400 d after it…
Spectral Energy Distributions for TeV Blazars
C. Lin, J. H. Fan
In this work, we collected a sample of 69 TeV blazars from TeVCat, obtained their multi-wavelength observations, and fitted their spectral energy distributions by using the second…