On the Stability of Magnetized Rotating Jets: The Nonaxisymmetric Modes

Details On the Stability of Magnetized Rotating Jets: The Nonaxisymmetric Modes On the Stability of Magnetized Rotating Jets: The Nonaxisymmetric Modes

Oct 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...470..797b&link_type=abstract

Astrophysical Journal v.470, p.797

Astronomy and Astrophysics

Astronomy

17

Magnetohydrodynamics: Mhd, Galaxies: Jets, Ism: Jets And Outflows, Instabilities

Scientific paper

We discuss the linear response of a rotating, magnetized jet to shear instabilities, extending our previous work to the nonaxisymmetric case. Our focus is on describing both the solutions derived from the dispersion relation and the physics underlying the changes in behavior seen as compared with the axisymmetric case. The most interesting new result is the strong stabilization of the ordinary mode for small longitudinal wavenumbers and large Mach numbers; this behavior is particularly pronounced for counterrotating (i.e., negative azimuthal wavenumber) modes and leads to a predominance of linearly unstable inertial or intermediate modes for rotating jets at small Mach numbers.

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