The Power Spectrum of CDM on Sub-Galactic Scales

Details The Power Spectrum of CDM on Sub-Galactic Scales The Power Spectrum of CDM on Sub-Galactic Scales

Apr 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005idm..conf..104h&link_type=abstract

THE IDENTIFICATION OF DARK MATTER. Proceedings of the Fifth International Workshop. Held 6-10 September 2004 in Edinburgh, UK. E

Physics

Scientific paper

We show that collisional damping and free-streaming of cold dark matter (CDM) induce a sharp cut-off in the CDM power spectrum at about 10-6M&sun;, which sets the typical scale for the first CDM haloes in the hierarchical picture of structure formation. We present a WMAP normalized primordial power spectrum, which could serve as an input for high resolution CDM simulations. The smallest inhomogeneities typically enter the non-linear regime at a redshift of about 60.

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