The Effect of Uncertainty in σ8 on Dark Matter Halo Properties

Details The Effect of Uncertainty in σ8 on Dark Matter Halo Properties The Effect of Uncertainty in σ8 on Dark Matter Halo Properties

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003idm..conf...90e&link_type=abstract

THE IDENTIFICATION OF DARK MATTER. Proceedings of the Fourth International Workshop. Held 2 - 6 September 2002 in York, UK. Edit

Other

Dark Matter, Galactic Halo, Galactic Halos

Scientific paper

Some recent determinations have yielded a lower amplitude for the matter power spectrum, as parametrised through σ8, the linear theory rms fractional density perturbations in spheres of radius 8h-1Mpc, than had previously been inferred. The impact upon predicted dark matter halo properties of this smoother mass distribution is considered, with particular reference to the Milky Way. A rough calculation of the effect of baryonic contraction is also included. It is found that the uncertainties are sufficient to preclude the rejection of CDM as a viable model for the Milky Way halo. This conclusion is reached using either the observed dark matter density at the Solar radius or the integrated mass within the Solar radius.

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