226 citations · 637 across the 23 of their papers we have counts for
13 papers · 1 filter
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…
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…
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…
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…
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…
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…
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…