A5016992523- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Galaxies: Formation, Evolution, Phenomena
- Radio Astronomy Observations and Technology
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
Yuxi Normal University
2023-2024
Abstract We present photometric observations of the BL Lacertae object S5 0716+714 with a temporal resolution 120 s in Sloan <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msup> <mml:mrow> <mml:mi>i</mml:mi> </mml:mrow> <mml:mi>′</mml:mi> </mml:msup> </mml:math> and <mml:mi>r</mml:mi> bands. These were conducted using Comet Search Program telescope at Xingming Observatory from 2018 December 22 to 2020 February 15, more than 5600 effective images obtained on...
Abstract Under the hypothesis of gravitational redshift induced by central supermassive black hole and based on line widths shifts redward-shifted H β α broad emission lines for more than 8000 Sloan Digital Sky Survey DR7 active galactic nuclei (AGNs), we measure virial factor in determining masses. The had been believed to be independent accretion radiation pressure gas clouds broad-line regions (BLRs) only dependent inclination effects BLRs. measured spans a very large range. For vast...
Abstract We propose a jet helical motion model to explain the γ -ray quasiperiodic oscillation of PG 1553+113. In this model, we hypothesize that relativistic with constant angular velocity rotates around axis, causing Doppler factor vary over time, leading periodic changes in flux. addition, consider parameters emission field slightly during observation period and can be obtained by directly fitting their multiwavelength spectra. Then, use resulting information reproduce light curve. Our...
Abstract The variability data for the BL Lacertae object TXS 1902+556 in optical and γ-ray wavebands were obtained from 0.76 m Katzman Automatic Imaging Telescope Fermi Large Area (Fermi-LAT), covering periods of 14.4 years 14.7 years, respectively. properties systematically analyzed, with particular emphasis on first comprehensive investigation radiation variation waveband. Four well-established techniques employed this purpose: Lomb-Scargle periodogram, REDFIT program, Jurkevich method,...