I will present a unified framework for understanding and deriving the many universal laws in the distribution and evolution of dark matter subhalos, across mass scales, redshifts and cosmologies. This framework stems from an extremely simple and intuitive picture that subhalos are accreted unbiasedly from the environment, relative to the accretion of smooth matter. Starting from this, we are...
The halo model is a powerful tool for understanding the non-linear evolution of the large-scale structure. Conventionally, a dark matter halo is defined as a collapsed object in virial equilibrium, with its boundary set by the virial radius. However, this definition does not appropriately separate the halo and the environment, as a halo is much more extended beyond the virial radius and grows...
In the ΛCDM universe, structure formation is generally not a self-similar process, while some self-similarity
remains in certain statistics, which can greatly simplify our description and understanding of the cosmic structures .In this work, we show that the merger tree of dark matter halos is approximately self-similar by investigating the universality of the subhalo peak mass function (PMF)...
We investigate the depletion radius of dark matter haloes by analyzing stacked mass flow rate (MFR) profiles derived from a large N-body cosmological simulation, focusing on its dependence on various halo properties. We find that the depletion radius is primarily determined by the conventional mass accretion rate, defined as the logarithmic growth rate of the virial mass with respect to the...
