Yunnan Observatory, National Astronomical Observatories, Chinese Academy of Sciences, Kunming 650011, China; Guangdong University of Technology, Guangzhou 510643, China
Abstract It is now known that there are supermassive black holes at the centre of a galaxy, surrounded by an accretion disc. The black hole-jet-accretion disc model plays an important role in the explanation of the observational properties of active galactic nuclei. BL Lacertae objects form a subclass of blazars; they are monitored through electromagnetic wave bands. During the OJ-94 project, 3C 66A was observed as a comparison object of OJ287 and found to display a possible 65-day period in the V light curve. In this paper, we show that the instability of an accretion disc surrounding a massive central black hole ($2.5\times10^{7}$M⊙) may explain this period in 3C 66A.
Received: 20 October 2003
Revised: 26 January 2004
Accepted manuscript online:
PACS:
98.54.Cm
(Active and peculiar galaxies and related systems (including BL Lacertae objects, blazars, Seyfert galaxies, Markarian galaxies, and active galactic nuclei))
Fund: Project supported by the National Natural Science Foundation of China (Grant No 10273019) and the Special Funds for Major State Basic Research Project ("973").
Cite this article:
Su Cheng-Yue (苏成悦) The variability of BL Lac 3C 66A 2004 Chinese Physics 13 1375
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