On the structure and nature of dark matter halos

摘要: The structure of dark matter halos as predicted from cosmological models is discussed and compared with observed rotation curves matter-dominated dwarf galaxies. theoretical predict that represent a one-parameter family universal density profile. Observations indeed confirm the halos. They are even in excellent agreement expected mass-radius scaling relations for currently favoured model (standard cold Omega_0=0.25 Omega_{Lambda}=0.75). profiles however disagree distributions. Secular processes which might affect inner halo do not seem to provide good solution this problem. We discuss, an alternative, possibility consist two separate components, baryonic non-baryonic component.