TheS-shaped limit cycle of accretion disk and quasi-periodic variation of BL Lac object on231

Details TheS-shaped limit cycle of accretion disk and quasi-periodic variation of BL Lac object on231 TheS-shaped limit cycle of accretion disk and quasi-periodic variation of BL Lac object on231

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ap%26ss.173..101b&link_type=abstract

Astrophysics and Space Science, Volume 173, Issue 1, pp.101-108

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

If we adopt the analytical approximation of the full intergrations of thin disk, we obtainS-shaped limit cycle around the supermassive black holes in BL Lac objects. On the basis of this, we explain quasi-periodic outburst of the BL Lac object ON+231. Conclusion is drawn that the accretion of black holes is the possible energy source of ON+231 and its variability is caused by the thermal limit cycle with alternating higher and lower accretion rates onto the black hole.

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