The central densities of dark matter (DM) halos are much lower than predicted in cold DM models of structure formation. Confirmation that they have cores with a finite central density would allow us to rule out many popular types of collisionless particle as candidates for DM. Any model that leads to cusped halos (such as cold DM) is already facing serious difficulties on small scales and hot D...

N-body simulations of the Cold Dark Matter (CDM) model yield singular halo density profiles in apparent conflict with halo profiles of dark-matter-dominated galaxies derived from observed rotation curves. An analytical model we have derived elsewhere for the postcollapse equilibrium of cosmological halos reproduces many of the average properties of halos in CDM simulations to good accuracy, inc...

We present the first study on the mass functions of Jenkins et al (J01) and an estimate of their corresponding largest virialized dark halos in the Universe for a variety of dark-energy cosmological models with a running spectral index. Compared with the PL-CDM model, the RSI-CDM model can raise the mass abundance of dark halos for small mass halos at lower redshifts, but it is not apparent on ...

Halo is one of the most important basic elements in cosmology simulation, which merges from small clumps to ever larger objects. The processes of halos’ birth and merging play a fundamental role in studying the large scale cosmological structure’s evolution. In this paper, a visual analysis system is developed to interactively identify and explore the evolution histories of thousands of halos. ...

Social aspects of multiplayer games are well known as contributors to game success, with online friendships and socialization expected to expand and strengthen a player-base. Understanding the nature of social behavior and determining the impact of cooperation on gameplay is thus important to game design. Here we make use of the data exposed through the public interface of a contemporary first-...