1202.0560 (Jarah Evslin et al.)

Dwarf Galaxy Sized Monopoles as Dark Matter?    [PDF]

Jarah Evslin, Sven Bjarke Gudnason

We propose a model of dark matter: galaxy-sized 't Hooft-Polyakov magnetic monopoles in a new, extraordinarily weakly coupled SU(2) gauge sector with an adjoint Higgs field and two flavors of fundamental fermions. We fit the parameters by asserting that the dark matter halos of the lightest dwarf spheroidal (dSph) galaxies consist of a single charge Q=1 monopole. Lensing and wide binary bounds are then easily satisfied and the monopoles form in time to help with CMB fluctuations. In this model dSph and low surface brightness (LSB) halos automatically have (1) A minimum mass - Dirac quantization solves the missing satellite problem, (2) A constant density core (rView original: http://arxiv.org/abs/1202.0560