Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/8291
Title: A new model for the periodic outbursts of the BL Lac object OJ287
Authors: Shi, W 
Liu, X
Song, H
Keywords: Black hole physics
BL Lac objects
Individual: OJ287
Radiation mechanisms: non-thermal
Issue Date: 2007
Source: Astrophysics and space science, 2007, v. 310, no. 1-2, p. 59-63 How to cite?
Journal: Astrophysics and Space Science 
Abstract: Recent observations provide strong evidence for the BL Lac object OJ287 exhibiting a 11.6±0.5 yr periodicity with a double-peaked maxima in its optical flux variations. Several models have been proposed for the optical behavior. The 2005 November outburst in OJ287 gives us a surprising result since calculation based on the periodicity was predicting such an outburst in late 2006. Here we suggest a new model, it can not only explain the optical quasi-periodic behavior, but also the radio flares behavior which is and simultaneous with the optical flares. We propose that OJ287 is a binary pair of super-massive black holes, both of them creating a jet. The quasi-periodic double peaks would be due to the relativistic beaming effect on the emission coming from the double helix jets. We used “core flares” to explain the large lags between light curves at different frequencies, and the assumption of two jets appear to be merged with each other partly in the radio frequency emitting regions provides a viable interpretation that we can see only a broad maximum which contains two radio flares that we cannot distinguish.
URI: http://hdl.handle.net/10397/8291
ISSN: 0004-640X
DOI: 10.1007/s10509-007-9413-z
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