Computer Science – Sound
Scientific paper
Aug 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976mnras.176..421t&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 176, Aug. 1976, p. 421-441.
Computer Science
Sound
82
Astronomical Models, Energy Transfer, Extragalactic Radio Sources, Kelvin-Helmholtz Instability, Relativistic Effects, Entrainment, Half Spaces, Particle Energy, Perturbation Theory
Scientific paper
Some models of extragalactic radio sources require that energy is transferred from the nucleus to the radio components by relativistic streams, and it is pertinent to ask how much such streams would be spread out laterally and slowed down by entrainment of surrounding material. As a preliminary to attempting to understand such a situation, the Kelvin-Helmholtz instability at a tangential velocity discontinuity is investigated in the case where the relative motion is relativistic for values of the sound speed in the two fluids which may or may not be relativistic. The case is also considered where one half space is occupied by a collisionless gas of particles or photons, which therefore cannot be treated as a fluid. The principal result is that growing modes exist in all these cases; the growth rates of small perturbations have been calculated for a wide variety of parameters.
Scheuer Peter A. G.
Turland B. D.
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