Physics – Nuclear Physics
Scientific paper
Jun 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004nuphs.132...31b&link_type=abstract
Nuclear Physics B Proceedings Supplements, Volume 132, p. 31-40.
Physics
Nuclear Physics
Scientific paper
We review current models of energetic particle acceleration and nonthermal emission from objects of very different scales from clusters of galaxies through massive galaxies to supernova remnants. The nonthermal phenomena in clusters and massive galaxies are considered in the context of the hierarchical model of cosmic structure formation by accretion and merging of the dark matter (DM) substructures. The hierarchical model predicts interaction of sub-galactic scale DM halos with massive galaxies. The accretion and merging processes are producing gas shocks. Being the main gas-heating agent, large-scale shocks in the course of cluster/galaxy structure aggregation, could accelerate energetic particles by the same collisionless plasma relaxation processes. Nonthermal emission of the energetic particles in clusters and massive galaxies could be a test to constrain the DM minihalos properties. We also discuss X-ray emission from supernova remnants in a dense galactic environment with applications to deep observations of the Galactic Center region.
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