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The Production of Rotation Measure Gradients in the Lobes of Extragalactic Radio Sources

  • G.V. Bicknell (a1) (a2), R.A. Cameron (a1) (a2) and R.A. Gingold (a3)

Abstract

It is proposed that the large rotation measure gradients observed in the lobes of some extragalactic radio sources are produced by non–linear Kelvin–Helmholtz surface waves. Related small scale turbulence is responsible for a “diffuse spray” of relativistic plasma and magnetic field into the surrounding medium. The mixture of magnetic field and thermal plasma causes large rotation measure variations on the scale of the Kelvin–Helmholtz waves. An order of magnitude prediction of the effect is in good agreement with the observations of Cygnus A and PKS 2104–25 N.

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Copyright

References

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Bicknell, G.V., 1989, SIAM J. Sci. Stat. Comput. , in press
Bicknell, G.V., Cameron, R.A. and Gingold, R.A., 1989, Ap.J. , in press
Cameron, R.A., 1989, Ph.D. thesis, Australian National University.
Dreher, J.W., Carilli, C.L., and Perley, R.A. 1987, Ap. J. , 316, 611 (DCP)
Parker, E.N., 1979, Cosmical Magnetic Fields , Clarendon Press, Oxford.

The Production of Rotation Measure Gradients in the Lobes of Extragalactic Radio Sources

  • G.V. Bicknell (a1) (a2), R.A. Cameron (a1) (a2) and R.A. Gingold (a3)

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