The shapes of dark matter dominated dwarf spheroidal stellar density profiles
Abstract
A Bayesian likelihood analysis of the stellar density profile shapes of several dark matter dominated Galactic dwarf spheroidal galaxies (dSphs) has been completed. This analysis indicates that the inner power law, ρ r-γ, of each of these profiles satisfies γ< 1.21 at greater than 99% confidence with a slight preference for γ 0.7 . Speculating that this bound on the stellar profiles may be related to the inner power law of the underlying dark matter distribution reveals a statistical discrepancy with the values favoured by recent N-body simulations of cold dark matter (CDM), γCDM 1.4-1.5 .
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