A Precessing Disc in OJ287?

Details A Precessing Disc in OJ287? A Precessing Disc in OJ287?

1996-04-18

arxiv.org/abs/astro-ph/9604110v1

Astronomy and Astrophysics

Astrophysics

9 pp., tex, 0 figures

Scientific paper

Sillanp\"a\"a, {\it et al.} (1996) have demonstrated that the AGN OJ287 has intensity peaks which recur with a period of about 12 years. I suggest that this is the result of the sweeping of a precessing relativistic beam across our line of sight. In analogy to Her~X-1 and SS433, precession is attributed to the torque exerted by a companion mass on an accretion disc. Secondary maxima observed 1.2 years after two of these peaks may be evidence of nodding motion.

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