Resolving infall caustics in dark matter halos
Abstract
It has been found that the phase space of dark matter particles assembling a galactic halo in cosmological N-body simulations well defines the fine grained structure. Recently accreted particles form distinctive velocity streams with high density contrast. For a fixed observer position, these streams lead to peaks in the velocity distribution. Overall structure is close to that emerging in the secondary infall model.
- Publication:
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Soviet Journal of Experimental and Theoretical Physics Letters
- Pub Date:
- February 2013
- DOI:
- 10.1134/S0021364012240022
- arXiv:
- arXiv:1210.8009
- Bibcode:
- 2013JETPL..96..754D
- Keywords:
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- Astrophysics - Astrophysics of Galaxies;
- High Energy Physics - Phenomenology
- E-Print:
- 7 pages, 5 figures