Galactic Halos in MONDian Cosmological Simulations

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-Ω₀ MONDian model with an appropriate choice for the normalisation σ₈ of the primordial density fluctuations can lead to similar clustering properties at redshift z = 0 as the commonly accepted (standard) ΛCDM 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.