The Binary Black Hole Scenario for the BL Lacertae Object AO 0235+16

Recent analysis of the long term radio light curve of the extremely variable BL Lacertae object AO 0235t16 by Raiteri et al. have revealed the presence of recurrent outbursts with a period of ～ 5.7 ± 0.5yr. Periodicity analysis of the optical light curve also shows evidence for a shorter period. Here we discuss whether such a behavior can be explained by a binary black hole model where the accretion disk of one of the supermassive black holes is precessing due to the tidal effects of the companion. We estimate the mass of the accreting hole and analyze constraints on the secondary mass and the orbital parameters of the system. It is possible to provide a viable interpretation of the available multiwavelength data.

作 者： G.E.Romero Jun-Hui Fan S.E.Nuza   作者單位： G.E.Romero(Instituto Argentino de Radioastronomía, C.C.5, (1894) Villa Elisa, Bs. As., Argentina)

Jun-Hui Fan(Center for Astrophysics, Guangzhou University, Guangzhou 510400)

S.E.Nuza(Departamento de Física J. J. Giambiagi, FCEN, UBA, Pabellón 1, Ciudad Universitaria,1428 Buenos Aires, Argentina) 

刊 名： 天體物理學(xué)報(英文版)  ISTIC SCI 英文刊名： CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS  年，卷(期)： 2003 3(6)  分類號： P14  關(guān)鍵詞： galaxies: active - BL Lacertae objects: individual: AO 0235+16 -gamma rays: theory - black hole physics  

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