Complex scalar field dark matter on galactic scales
  The nature of the cosmological dark matter remains elusive. Recent studies
have advocated the possibility that dark matter could be composed of
ultra-light, self-interacting bosons, forming a Bose-Einstein condensate in the
very early Universe. We consider models which are charged under a global
U(1)-symmetry such that the dark matter number is conserved. It can then be
described as a classical complex scalar field which evolves in an expanding
Universe. We present a brief review on the bounds on the model parameters from
cosmological and galactic observations, along with the properties of galactic
halos which result from such a dark matter candidate.
