Friday, January 22, 2010, Noon, Phillips Auditorium
Neutrino Hot Dark Matter and Hydrodynamics of Structure Formation:
Two 'New' Features of Matter
Dr. Theo Nieuwenhuizen, University of Amsterdam
| I will discuss an isothermal model for dark matter fermions, for the galaxies and for the X-ray gas in the Abell 1689 cluster. I conclude that its dark matter likely consists of 1.5 eV hot neutrinos. Condensation of the neutrinos on the galaxy cluster at z = 6-10 may cause a re-ionization of the gas, without assistance of a hypothetical Pop III dominated by massive stars. This would imply a top-down picture of structure formation. To explain baryonic structures and galactic dark matter, I discuss gravitational hydrodynamics. It predicts primordial structures at three scales: galaxy clusters versus proto-voids in the plasma, and Jean clusters as well as milli brown dwarfs of terrestrial weight after decoupling. The approach explains observations such as: the flattening of galactic rotation curves; the Tully-Fisher and Faber-Jackson relations; and the cosmic microwave background temperature fluctuations of sub-milli-kelvins. |