Physics
Scientific paper
Feb 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005tmgm.meet.1337c&link_type=abstract
The Tenth Marcel Grossmann Meeting. Proceedings of the MG10 Meeting held at Brazilian Center for Research in Physics (CBPF), Rio
Physics
Scientific paper
Very large baseline interferometry has revealed the existence of relativistic jets emanating from the core of several active galactic nuclei. A substantial fraction of them shows discrete features, which are moving apparently with superluminal velocities. Superluminal motions are thought being caused by a geometrical effect due to the small angle between the relativistic jet and the line of sight. In some cases, jet components are observed being ejected in distinct directions with different apparent proper motions. In this work, we select some objects that exhibit these characteristics and interpret them as due to jet precession. The parameters of precession model for such objects are constrained using their high-resolution radio maps and their optical variability. With the precession parameters and assuming that precession is induced by a secondary supermassive black hole in a non-coplanar orbit in relation to the accretion disc, we estimate some physical parameters of the binary system, such as the separation between the black holes and limits for their masses.
Abraham Zulema
Caproni Anderson
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