EAS Publications Series

Mass Profiles and Shapes of Cosmological Structures
G.A. Mamon, F. Combes, C. Deffayet and B. Fort (eds)
EAS Publications Series, 20 (2006) 239-242
DOI: 10.1051/eas:2006077

Galactic Halos in MONDian Cosmological Simulations

A. Knebe

Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany

Abstract
We present results derived from a high-resolution cosmological N-body simulation in which the equations of motion have been changed to account for MOdified Newtonian Dynamics (MOND). It is shown that a low- $\Omega_0$ MONDian model with an appropriate choice for the normalisation $\sigma_8$ of the primordial density fluctuations can lead to similar clustering properties at redshift z=0 as the commonly accepted (standard) $\Lambda$ CDM model. However, such a model shows no significant structures at high redshift with only very few objects present beyond z>3. For the current implementation of MOND density profiles of gravitationally bound objects at z=0 can though still be fitted by the universal NFW profile.