Dynamical estimates of the local density of dark matter (original) (raw)

Motivated by current interest in searches for products of halo and solar annihilation of dark matter particles, as well as its direct detection, we discuss the range of likely values of the density of halo dark matter (DM) in the solar neighbourhood, p~M calculated using a model that assumes that the radial distribution of DM in protogalaxies changes adiabatically as the gas fails toward the centre to form the visible cores, lfprotogalaxies have the structure expected in the cold DM cosmology, we argue that a variety of observational and theoretical constraints imply 0.2 < p ~M/GeV cm-3 < 0.43 and that the luminous matter mass fraction F< 0.12.