A Search of IDV Sources around J1819+3845
The quasar J1819+3845 has shown rapid amplitude variability (of up to 300％) in radio flux density on time scales of hours. The fast intra-day variability (IDV) was ascribed to the interstellar scintillation (ISS) of radio waves in the turbulent interstellar medium of the Milky Way (Dennett-Thorpe & de Bruyn 2000). In order to set limits to the angular size of the scintillating screen, we observed several sources in the vicinity of J1819+3845 with the Effelsberg 100 m and Urumqi 25 m radio telescope at 5 GHz. The sources were selected from the VLBA calibrator survey. The scattering screen covers only J1819+3845, and the most nearby sources do not show such rapid IDV.
galaxies Active Galactic Nuclei quasar intraday variability
H.G. Song X. Liu N. Marchili T.P. Krichbaum
Urumqi Observatory, The National Astronomical Observatory, The Chinese Academy of Sciences, Urumqi 8 Max-plank-Institute fur Radioastronomie, D-53121 Bonn, Germany
国际会议
The 10th Asian-Pacific Regional International Astronomical Union Meeting(第十届亚洲及太平洋地区天文学大会 APRIM)
昆明
英文
256-257
2008-08-03（万方平台首次上网日期，不代表论文的发表时间）