UNDERSTANDING HOW GALAXIES ACQUIRE THEIR ANGULAR MOMENTUM USING NUMERICAL SIMULATIONS

Abstract

Using N-body cosmological simulation, we present a detail study of redshift evolution and the impact of box size on the properties of dark matter halos. Our focus is to review their structural parameters in ΛCDM model. We aim to study the effects of angular momentum in dark matter halos using tidal torque theory. Using arguments based on the spherical collapse model, we analyze the behaviour of the scalelength of density profiles of dark matter. We predicted the mass distribution of dark matter halos using the Tinker et al. mass function. We also investigated the redshift dependence of halo mass, concentration, viral energy ratios, offset of density peaks and spin parameter. We utilized different computational packages for analysis and found our statistical results in agreement with the findings of previous studies.