Abstract
Numerical simulations of hot spots and their associated jets are reviewed with special emphasis on their dynamical variability. Two-dimensional simulations incorporate dynamically passive and important magnetic fields in the ideal MHD limit. Distributions of total and polarized radio brightness have been derived for comparison with observation. The move toward three-dimensional simulations is documented, and hydrodynamical models for multiple hot spots are reviewed. Useful insights can be gleaned from 2-dimensional slab jet simulations, which relax the axisymmetric constraints while allowing high numerical resolution. In particular, the “dentist drill” model (Scheuer 1982) for working surface variability is substantiated and shown to result from self-excited jet instabilities near the working surface. Three-dimensional simulations with magnetic fields are now feasible with the availability of large memory supercomputers, which should yield the first realistic hot spot geometries. The development emphasis will then shift to emission physics, which will continue to be hampered by our lack of understanding of relevant particle acceleration mechanisms.
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Norman, M.L. (1989). Numerical simulations of hot spots. In: Meisenheimer, K., Röser, HJ. (eds) Hot Spots in Extragalactic Radio Sources. Lecture Notes in Physics, vol 327. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0036030
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DOI: https://doi.org/10.1007/BFb0036030
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