226 citations · 637 across the 23 of their papers we have counts for
23 papers
Jet Power, Bulk Lorentz Factor, Black Hole Spin, and Magnetic Field of Accretion Disk in Jetted Active Galactic Nuclei: A Large Gamma-Ray Emission Sample
Dingrong Xiong, Junhui Fan, Feng Yuan +14
We present a catalog of physical parameters for powerful jet-accretion disk-black hole systems in one of the largest samples of gamma-ray emitting jetted active galactic nuclei (AG…
Identifying Radio Active Galactic Nuclei with Machine Learning and Large-Area Surveys
Xu-Liang Fan, Jie Li
Context. Active galactic nuclei (AGNs) and star forming galaxies (SFGs) are the primary sources of extragalactic radio sky. But it is difficult to distinguish the radio emission pr…
MWA and VLA Observations of Diffuse Radio Lobes in M 87
Linhui Wu, Fu-Guo Xie, Qian Zheng +12
This study investigates the projected, quasi-symmetric -scale diffuse radio lobes surrounding the giant elliptical galaxy M\,87, utilizing well-sampled wideband ($\…
Mid-Infrared Properties of Narrow-Line Seyfert 1 Galaxies Detected by LoTSS DR2
Xu-Liang Fan
Narrow-line Seyfert 1 galaxies (NLS1s), a subclass of active galactic nuclei (AGNs) at early stage of accretion process, are also found to host relativistic jets. However, currentl…
Constraining Evolution of Magnetic Field Strength in Dissipation Region of Two BL Lac Objects
Xu-Liang Fan, Da-Hai Yan, Qing-Wen Wu +1
With the assumption that the optical variability timescale is dominated by the cooling time of the synchrotron process for BL Lac objects, we estimate time dependent magnetic field…
Revisit the fraction of radio-loud narrow line Seyfert 1 galaxies with LoTSS DR1
Xu-Liang Fan
Radio-Loud narrow-line Seyfert 1 galaxies (NLS1s), especially the extremely radio-loud ones, are widely accepted as the jetted versions of NLS1s. We explore the radio-loud fraction…
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…
Jet Power of Jetted Active Galactic Nuclei: Implication for Evolution and Unification
Xu-Liang Fan, Qingwen Wu
We construct samples of jetted active galactic nuclei (AGNs) with low-frequency radio data from the recent released TGSS AD1 catalog at 150 MHz. With these samples, we compare the…
Reddening of the BLR and NLR in AGN From a Systematic Analysis of Balmer Decrement
Kai-Xing Lu, Yinghe Zhao, Jin-Ming Bai +1
We selected an active galactic nuclei (AGN) sample () from Sloan Digital Sky Survey Data Release 7, and measured the broad- () and narrow-line…
The Radio/Gamma Connection of Blazars from High to Low Radio Frequencies
Xu-Liang Fan, Qingwen Wu
We construct a large sample of gamma-ray blazars with low-frequency radio data using the recent released TGSS AD1 catalog at 150 MHz. The radio/gamma connections of blazars are com…
Constraints on the composition, magnetization, and radiative efficiency in jet of blazar
Xu-Liang Fan, Qingwen Wu, Neng-Hui Liao
The composition and energy dissipation in jets are two of the fundamental questions of jet physics that are not fully understood. In this paper, we attempt to constrain the composi…
Optical and Gamma-Ray Variability Behaviors of 3C 454.3 from 2006 to 2011
Xu-Liang Fan, Shao-Kun Li, Neng-Hui Liao +8
We present our photometric monitoring of a flat spectrum radio quasar (FSRQ) 3C 454.3 at Yunnan observatories from 2006 to 2011. We find that the optical color of 3C 454.3 shows ob…
-band host galaxy contamination of TeV -ray blazar Mrk 501: effects of the aperture size and seeing
Hai-Cheng Feng, Hong-Tao Liu, Ying-He Zhao +3
We simulated the -band contribution of the host galaxy of TeV -ray BL Lac object Mrk 501 in different aperture sizes and seeing conditions . The intensive observations were r…
A Method for Locating High Energy Dissipation Region in Blazar
Dahai Yan, Qingwen Wu, Xuliang Fan +2
The production site of gamma-rays in blazar jet is an unresolved problem. We present a method to locate gamma-ray emission region in the framework of one-zone emission model. From…
Constraints on the location of -ray emitting region for a sample of blazars with radio core-shift measurements
Linhui Wu, Qingwen Wu, Dahai Yan +2
We model simultaneous or quasi-simultaneous multi-band spectral energy distributions (SEDs) for a sample of 25 blazars that have radio core-shift measurements, where a one-zone lep…
The possible submillimeter bump and accretion-jet in the central supermassive black hole of NGC 4993
Qingwen Wu, Jianchao Feng, Xuliang Fan
NGC 4993, as a host galaxy of the electromagnetic counterpart of the first gravitational-wave detection of a binary neutron-star merger, was observed by many powerful telescopes fr…
Search for intra-day optical variability in Mrk 501
Hai-Cheng Feng, H. T. Liu, X. L. Fan +5
We present our observations of the optical intra-day variability (IDV) in -ray BL Lac object Mrk 501. The observations were run with the 1.02 m and 2.4 m optical telescopes at Y…
Optical Spectroscopy of Four Young Radio Sources
Xu-Liang Fan, Jin-Ming Bai, Chen Hu +1
We report the optical spectroscopy of four young radio sources which are observed with the Lijiang 2.4m telescope. The Eddington ratios of these sources are similar with those of n…
What determines the observational differences of blazars?
Xu-Liang Fan, Jin-Ming Bai, Jirong Mao
We examine the scenario that the Doppler factor determines the observational differences of blazars in this paper. Significantly negative correlations are found between the observa…
Discovery of -ray emission from the radio-intermediate quasar III Zw 2: violent jet activity with intraday -ray variability
Neng-Hui Liao, Yu-Liang Xin, Xu-Liang Fan +4
III Zw 2 is the prototype of radio-intermediate quasars. Although there is the evidence of possessing strong jet, significant -ray emission has not been reported before. In this…
Supermassive Black Holes with High Accretion Rates in Active Galactic Nuclei. V. A New Size-Luminosity Scaling Relation for the Broad-Line Region
Pu Du, Kai-Xing Lu, Zhi-Xiang Zhang +12
This paper reports results of the third-year campaign of monitoring super-Eddington accreting massive black holes (SEAMBHs) in active galactic nuclei (AGNs) between 2014-2015. Ten…
Supermassive Black Holes with High Accretion Rates in Active Galactic Nuclei. IV. H Time Lags and Implications for Super-Eddington Accretion
Pu Du, Chen Hu, Kai-Xing Lu +13
We have completed two years of photometric and spectroscopic monitoring of a large number of active galactic nuclei (AGNs) with very high accretion rates. In this paper, we report…
The Connection between Radio and Gamma Ray Emission in Fermi/LAT Blazars
Fan Xu-Liang, Bai Jin-Ming, Liu Hong-Tao +2
We collect the 2LAC and MOJAVE quasi-simultaneous data to investigate the radio-gamma connection of blazars. The cross sample contains 166 sources. The statistic analysis based on…