Wind instability and the helical structure of radio-galaxy jets

Details Wind instability and the helical structure of radio-galaxy jets Wind instability and the helical structure of radio-galaxy jets

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pazh...12..522g&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 12, July 1986, p. 522-528) Soviet Astronomy Letters (ISSN 0360-0327), vol. 12, July-Aug

Astronomy and Astrophysics

Astronomy

Magnetohydrodynamic Stability, Radio Galaxies, Radio Jets (Astronomy), Magnetic Fields, Supersonic Jet Flow, Surface Waves, Wave Propagation

Scientific paper

Magnetohydrodynamic wind instability in a supersonic relativistic magnetized beam could induce helical boundary perturbations with characteristic wavelengths and azimuthal numbers that are consistent with the wavy contours observed in many radio-galaxy jets. Calculations are performed which indicate that resonance splitting should have little effect on this instability behavior. A diagram is presented of a cylindrical jet with a wavy boundary, illustrating the mutual orientation of the ambient flow-velocity vectors, the magnetic field, and the direction of wave propagation.

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