中国物理B ›› 2004, Vol. 13 ›› Issue (8): 1375-1376.doi: 10.1088/1009-1963/13/8/035

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The variability of BL Lac 3C 66A

苏成悦   

  1. Yunnan Observatory, National Astronomical Observatories, Chinese Academy of Sciences, Kunming 650011, China; Guangdong University of Technology, Guangzhou 510643, China
  • 收稿日期:2003-10-20 修回日期:2004-01-26 出版日期:2004-06-21 发布日期:2005-06-22
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10273019) and the Special Funds for Major State Basic Research Project ("973").

The variability of BL Lac 3C 66A

Su Cheng-Yue (苏成悦)   

  1. Yunnan Observatory, National Astronomical Observatories, Chinese Academy of Sciences, Kunming 650011, China; Guangdong University of Technology, Guangzhou 510643, China
  • Received:2003-10-20 Revised:2004-01-26 Online:2004-06-21 Published:2005-06-22
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10273019) and the Special Funds for Major State Basic Research Project ("973").

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摘要： 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 (2.5×10^{7}M_⊙) may explain this period in 3C 66A.

关键词: active galactic nuclei, black hole, accretion disc, variability

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.

Key words: active galactic nuclei, black hole, accretion disc, variability

中图分类号:  (Active and peculiar galaxies and related systems (including BL Lacertae objects, blazars, Seyfert galaxies, Markarian galaxies, and active galactic nuclei))

  • 98.54.Cm
98.62.Js (Galactic nuclei (including black holes), circumnuclear matter, and bulges) 98.62.Mw (Infall, accretion, and accretion disks) 04.70.-s (Physics of black holes) 97.10.Gz (Accretion and accretion disks) 97.60.Lf (Black holes)