Dynamical estimates of the local density of dark matter

Details Dynamical estimates of the local density of dark matter Dynamical estimates of the local density of dark matter

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988phlb..215...73f&link_type=abstract

Physics Letters B, Volume 215, Issue 1, p. 73-80.

Physics

54

Scientific paper

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, ϱDMsolar, calculated using a model that assumes that the radial distribution of DM in protogalaxies changes adiabatically as the gas falls toward the centre to form the visible cores. If protogalaxies have the structure expected in the cold DM cosmology, we argue that a variety of observational and theoretical constraints imply 0.2 <~ ϱDMsolar/GeV cm-3 <~ 0.43 and that the luminous matter mass fraction F <~ 0.12. We argue that a more likely range is 0.3 <~ ϱDMsolar/GeV cm-3 <~ 0.43 and F <~ 0.1 and that an estimate is possible for F ~ 0.1 It appears that similar constraints could apply in the cosmic string cosmology with hot DM.

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