Volume 385, Number 1, April I 2002
|Page(s)||14 - 20|
|Section||Cosmology (including clusters of galaxies)|
|Published online||15 April 2002|
Instability of relativistic sheared jets and distinction between FRI and FRII sources
Departamento de Astronomia y Astrofizica, Universidad de Valencia, 46100 Burjassot, Spain A.F. Ioffe Institute of Physics and Technology, 194021 St. Petersburg, Russia
Corresponding author: firstname.lastname@example.org
Accepted: 18 December 2001
We investigate the shear-driven instability of nonmagnetic relativistic jets with the bulk velocity, V, dependent on the cylindric radius, r. It is shown that instability can arise for any dependence of the velocity (or the Lorentz factor that is the same) on r. The shear-driven instability can effectively operate in the whole volume of a jet. The growth time can be shorter than that of the Kelvin-Helmholtz instability. The considered instability leads to a turbulization of jets and can account for a distiction between the jets in the FRI and FRII sources.
Key words: MHD / instabilities / ISM: jets and outflows / galaxies: jets
© ESO, 2002
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