Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...257l..23p&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 257, June 1, 1982, p. L23-L25. Research supported by the U.S.-Israel
Astronomy and Astrophysics
Astrophysics
29
Particle Acceleration, Plasma Acceleration, Plasma Jets, Radiation Pressure, Relativistic Velocity, Disks (Shapes), Extragalactic Radio Sources
Scientific paper
Acceleration by radiation pressure could, in principle, explain the observed relativistic velocity of jets in extragalactic radio sources. The radiative acceleration mechanism is based on radiation beams that are produced and collimated in funnels (vortices) along the rotation axis of a thick accretion disk. These radiation beams accelerate particles to form the relativistic jets. In order to accelerate particles to gamma greater than 1.5, the funnels must be short and very steep. However, such funnels cannot satisfy Rayleigh's stability criterion. Therefore, the radiative acceleration mechanism cannot accelerate particles to high relativistic velocities.
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