IDM2010

Session

Parallel Session : Structure Formation & N-body simulations 1

27 juil. 2010, 12:00

Amphithéatre Dumontet (Montpellier 2 University)

128. Universal Mass Accretion Rates and Concentrations of Dark Matter Halos

Prof. Donghai Zhao (Shanghai Astronomical Obervatory)

27/07/2010 12:00

Structure Formation & N-body simulations

Talk

Dark matter halos constitute cosmic structures, host galaxy formation, bend light from faraway galaxies and so are very important objects to study. In the past few years, a large amount of observations have constrained cosmological parameters and the initial density fluctuation spectrum to a pretty high accuracy. However, cosmological parameters change with redshift and the power index of the...

50. STERILE NEUTRINOS AND THE MILGROM’S LAW PROBLEM

Dr Luis Acedo (Instituto de Matemática Multidisciplinar, Universidad Politécnica de Valencia)

27/07/2010 12:20

Structure Formation & N-body simulations

Talk

In 1983 Milgrom proposed an alternative explanation for the anomalous rotation of galaxies based upon a modification of Newtonian dynamics for small accelerations (MOND theory) [1] . A careful analysis of the rotation curves revealed that the effect of the supposed dark matter seems to activate only when the orbital acceleration is smaller than 2x10^{-8} cm s^{-2}. MOND theory still...