Resolving infall caustics in dark matter halos

Abstract

We have found that the phase-space of a dark matter particles assembling a galactic halo in cosmological N-body simulations has well defined fine grained structure. Recently accreted particles form distinctive velocity streams with high density contrast. For fixed observer position these streams lead to peaks in velocity distribution. Overall structure is close to that emerging in the secondary infall model.

7 pages, 5 figures

References in corpus (6)

• Phase-space structure in the local dark matter distribution and its signature in direct detection experiments
• The fine-grained phase-space structure of Cold Dark Matter halos
• Infall caustics in dark matter halos?
• Does the Second Caustic Ring of Dark Matter Cause the Monoceros Ring of Stars ?
• Dark matter caustics and the enhancement of self-annihilation flux
• Dark Matter Caustics in Galaxy Clusters

Cited by in corpus (4)

• Axions and the Galactic Angular Momentum Distribution
• Phase-space structure of cold dark matter halos inside splashback: multi-stream flows and self-similar solution
• Testing universal dark-matter caustic rings with galactic rotation curves
• Cosmology and Dark Matter