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Erschienen in:
2010 | OriginalPaper | Buchkapitel
Numerical Models for Emission Line Nebulae in High Redshift Radio Galaxies
verfasst von : Volker Gaibler, Max Camenzind
Erschienen in: High Performance Computing in Science and Engineering '09
Verlag: Springer Berlin Heidelberg
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We examine models for line-emitting gas nebulae around powerful radio galaxies in the early universe. The models assume that either the emitting gas clouds are embedded in the shocked ambient gas and driven outwards with it or that they are created and sustained by multi-phase turbulence in the jet cocoon. For this, we perform jet simulations with realistic density contrasts on large scales and on typical activity time scales of several ten million years. The employed magnetohydrodynamics code NIRVANA has been optimized for the NEC SX machines in the previous years and now runs very efficiently on the SX-6 and SX-8, allowing us simulations both in axisymmetry and full three dimensions. Future simulations on the SX-9 will benefit significantly from the increased number of shared memory processors per node for the axisymmetric runs, where an MPI-parallelization is generally inefficient for our setup due to communication overhead.