Bound and unbound substructures in Galaxy-scale Dark Matter haloes

摘要: We analyse the coarse-grained phase-space structure of six Galaxy-scale dark matter haloes Aquarius Project using a state-of-the-art 6D substructure finder. Within r50, we find that about 35 per cent mass is in identifiable substructures, predominantly tidal streams, but including 14 self-bound subhaloes. The slope differential function close to −2, which should be compared ∼−1.9 for population Near 60 with 30 inner kpc highest resolution simulation has only 0.5 its subhaloes, 3.3 detected substructure, again primarily streams. densest streams near solar position have 3D density 1 local mean, and populate high-velocity tail velocity distribution.