Wind instability and helical perturbations of relativistic magnetized jets

Details Wind instability and helical perturbations of relativistic magnetized jets Wind instability and helical perturbations of relativistic magnetized jets

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986zhetf..91..779g&link_type=abstract

Zhurnal Eksperimental'noi i Teoreticheskoi Fiziki (ISSN 0044-4510), vol. 91, Sept. 1986, p. 779-791. In Russian.

Physics

2

Jet Flow, Kelvin-Helmholtz Instability, Perturbation Theory, Vortices, Active Galactic Nuclei, Mass Transfer, Nonuniform Flow, Quasars, Surface Waves

Scientific paper

Consideration is given to the vortex analog of the Kelvin-Helmholtz instability in an inhomogeneous flow with a velocity profile (colled wind instability). It is shown that, in the presence of a magnetic field and supersonic streaming (in both the relativistic and nonrelativistic cases), wind instability may lead to the development of helical perturbations with a characteristic wavelength and azimuthal number at the jet surfaces. The maximum growth rate is determined by the resonance between the surface wave and the vortices which are at a distance from the interface constituting a definite fraction of the perturbation wavelength. The results are used in the interpretation of wave patterns observed in mass ejections from quasars and active galactic nuclei.

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