Dark matter substructure: cosmology the initial power spectrum

Details Dark matter substructure: cosmology the initial power spectrum Dark matter substructure: cosmology the initial power spectrum

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...201.4307b&link_type=abstract

American Astronomical Society, 201st AAS Meeting, #43.07; Bulletin of the American Astronomical Society, Vol. 34, p.1170

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We explore the substructure content of Cold Dark Matter (CDM) halos expected for various assumptions about cosmology and the input inflationary power spectrum. Our model follows the mass accretion history of galaxy-sized halos using the Extended Press-Schechter formalism and tracks the orbital evolution of accreted subhalos under the influence of dynamical friction and tidal forces from the host potential. We compare our model expectations for various input cosmological models to the dwarf satellite content of the local group and the implied substructure content of halos derived from flux ratios in gravitationally lensed quazars. We also discuss how the history of tidal disruption events can be probed by structure in the stellar halo.

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