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Abstract. In this letter, we propose a model to explain the disintegration of ex- tragalactic jets and to predict the associated timescale. The model assumes that a jet is current and charge neutral as well as collimated at its source; however, the forward electron current gradually decays producing a magnetic field transverse to the direction of jet propagation. This growing transverse magnetic field eventually causes the jet to disintegrate.
Spicer, D. S., Bingham, R. and o'Sullivan, S. A model for predicting extragalactic jet lifetimes. Journal of Plasma Physics / Volume 76 / Issue 02 / April 2010, pp 129-134. DOI: http://dx.doi.org/10.1017/S0022377809990730