Tidally Induced Outbursts in the Binary Black Hole System OJ287

Details Tidally Induced Outbursts in the Binary Black Hole System OJ287 Tidally Induced Outbursts in the Binary Black Hole System OJ287

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dda....39.1505v&link_type=abstract

American Astronomical Society, DDA meeting #39, #15.05

Astronomy and Astrophysics

Astronomy

Scientific paper

OJ287 has been modeled as a binary black hole system [1] where the secondary impacts the accretion disk of the primary and the processes associated with the impacts lead to bursts of optical radiation. The direct impacts provide the necessary information for a unique determination of the orbital elements [2,3]. Here we discuss a secondary process where tidal torques induce an inward flow of gas in the accretion disk [4]. Some of this increased flow ends up in the jet where it causes internal shocks which appear as optical synchrotron outbursts. We have modeled the tidally induced flow by a superposition of many solutions of the relativistic three-body problem which together mimic a 10 million particle disk. The flow of disk matter through a sphere of 10 Schwarzschild radii of the primary is plotted as a function of time, and it is compared with the optical light curve over the same period of time. We find that the "inflow light curve” and the observed light curve are very similar. In particular, the late November 2007 outburst is very well reproduced. This gives confidence in the binary black hole model and the disk/jet connection that forms the basic mechanism leading to the bright synchrotron flares.
References: 1. Sillanpää et al. 1988, ApJ 325,628; 2. Lehto & Valtonen 1996, ApJ 460,207; 3. Valtonen et al. 2008, Nature (in press); 4. Sundelius et al. 1997, ApJ 484,180

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