Other
Scientific paper
Sep 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1168.1094m&link_type=abstract
NUMERICAL ANALYSIS AND APPLIED MATHEMATICS: International Conference on Numerical Analysis and Applied Mathematics 2009: Volume
Other
Gravitational Radiation, Magnetic Fields, And Other Observations, Galactic Center, Bar, Circumnuclear Matter, And Bulge, Galactic Nuclei, Circumnuclear Matter, And Bulges
Scientific paper
Superluminal jet components are recurrently ejected from the core of active galactic nuclei (AGNs). The mechanism driving this powerful phenomenon is not properly understood yet. Here we suggest that the components ejection from AGNs may be related to the astrophysical process known as Bardeen-Petterson (B-P) effect, a general relativistic effect which forces a tilt (precessing) accretion disk orbiting a Kerr black hole (KBH) to break apart at the B-P radius. This transition region hereby builds up a magneto-centrifugal barrier which precludes incoming matter to penetrate the AGN inner disk or torus, and creates a sort of force-free bridge or Lagrange internal point in a force-free magnetosphere. (Inwardly pointing forces are counterbalanced by outwardly pointing forces). The material trapped in such a region will eventually find a condition of orbital resonance (beating) with the warps traveling along the torus due to its differential rotation. At resonance the mass blobs can be expelled from the B-P radius in virtue of either the vertical (to the disk) linear momentum carried by the torus warps, or the Aschenbach effect in a nearly maximal KBH, or some other orbital resonances like the well known resonance 3:1. The launching of such superluminal components should produce powerful gravitational wave (GW) bursts during its early acceleration phase. These are GW signals that the LISA space-borne GW observatory can detect for distances upto nearly the Hubble radius.
Abraham Zulema
Caproni Anderson
Mosquera Cuesta Herman J.
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