Physics
Scientific paper
Nov 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aipc..878...10g&link_type=abstract
THE DARK SIDE OF THE UNIVERSE: 2nd International Conference on The Dark Side of the Universe DSU 2006. AIP Conference Proceedin
Physics
Dark Matter, Elementary Particle Processes, Cosmology
Scientific paper
The dark matter distribution on small scales may depend on the properties of the first generation of dark matter halos to form, which is in turn determined by the microphysics of the dark matter particles. We overview the microphysics of WIMPs and the calculation of the collisional damping and free streaming scales. We then present the resulting density perturbation power spectrum and the red-shift at which typical halos form, taking into account the effect of uncertainties in the WIMP properties (mass and interaction channel) and the primordial power spectrum. Finally we review simulations of the formation of the first WIMPy halos and discuss their subsequent evolution, in particular disruption due to encounters with stars.
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