Galactic halos in cosmology with long-range scalar DM interaction

Abstract

Based on a set of cosmological N-body simulations we analyze properties of the dark matter haloes (DM) in a galaxy mass range ($10^{11}-10^{13}{h}^{-1}{M}_{\odot }$) in modified $\lcdm$ cosmology with additional dynamically screened scalar interactions in DM sector. Our simulations show that scalar interactions support picture of the Island Universe. Rapid structure formation processes are shifted into higher redshifts resulting in a much smaller accretion and merging rates for galactic haloes at low redshifts. Finally, we present how this "fifth" force affects halo properties, like density profile, triaxiality, ellipticities and the spin parameter.

4 pages, 2 figures, printed in Annalen Phys.19:351-354,2010, subsituted with the accepted version

References in corpus (2)

• Ahf: Amiga's Halo Finder
• Dark Matter Gravitational Clustering With a Long-Range Scalar Interaction

Cited by in corpus (7)

• Nonlinear structure formation in the Cubic Galileon gravity model
• Nonlinear structure formation in Nonlocal Gravity
• Halo model and halo properties in Galileon gravity cosmologies
• DM haloes in the fifth-force cosmology
• Hierarchy of N-point functions in the LCDM and ReBEL cosmologies
• Boosting hierarchical structure formation with scalar-interacting dark matter
• Evolution of skewness and kurtosis of cosmic density fields