The fine-grained phase-space structure of cold dark matter haloes

摘要: We present a new and completely general technique for calculating the fine-grained phase-pace structure of dark matter (DM) throughout Galactic halo. Our goal is to understand this on scales relevant direct indirect detection experiments. method based evaluating geodesic deviation equation along trajectories individual DM particles. It requires no assumptions about symmetry or stationarity halo formation process. In paper we study static potentials which exhibit more complex behaviour than separable studied previously. For ellipsoidal logarithmic with core, phase mixing sensitive resonance structure, as indicated by number independent orbital frequencies. Regions chaotic can be identified very rapid decrease in real-space density associated streams. also evolution stream-density NFW haloes radially varying isopotential shape, showing that if such model applied halo, at least 10(5) streams are expected near Sun. The most novel aspect our approach non-static systems through implementation cosmological N-body code. Such an allows robust accurate evaluation enhancements annihilation radiation due fine-scale caustics. embed scheme current state-of-the-art code GADGET-3 tests demonstrate discreteness effects kept under control realistic configurations.