11 citations · 46 across the 14 of their papers we have counts for
10 papers · 1 filter
On a critical acceleration scale of dark matter in Lambda-CDM and dynamical dark energy
Zhijie, Xu
Universal acceleration emerges in various empirical laws, yet its fundamental nature remains unclear. Using Illustris and Virgo N-body simulations, we propose is the sc…
On the statistical theory of self-gravitating collisionless dark matter flow: Scale and redshift variation of velocity and density distributions
Zhijie Xu
This paper studies the scale and redshift variation of density and velocity distributions in self-gravitating collisionless dark matter flow by a halo-based non-projection approach…
Evolution of energy, momentum, and spin parameter in dark matter flow and integral constants of motion
Zhijie Xu
N-body equations of motion in comoving system and expanding background are reformulated in a transformed system with static background and fixed damping. The energy and momentum ev…
On the statistical theory of self-gravitating collisionless dark matter flow: high order kinematic and dynamic relations
Zhijie Xu
To better understand the collisionless dark matter flow on different scales, statistical theory involving kinematic and dynamic relations must be developed for different types of f…
On the statistical theory of self-gravitating collisionless dark matter flow
Zhijie Xu
Dark matter, if exists, accounts for five times as much as the ordinary baryonic matter. Compared to hydrodynamic turbulence, the flow of dark matter might possess the widest prese…
Halo mass functions from maximum entropy distributions in collisionless dark matter flow
Zhijie Xu
The halo-mediated inverse mass cascade is a key feature of the intermediate statistically steady state for self-gravitating collisionless dark matter flow (SG-CFD). A broad spectru…
Two-body collapse model for self-gravitating flow of dark matter and generalized stable clustering hypothesis for pairwise velocity
Zhijie Xu
Analytical tools are extremely hard to find for non-linear gravitational collpase. Only a few simple but powerful tools exist so far. Two examples are the spherical collapse model…
Maximum entropy distributions of dark matter in CDM cosmology
Zhijie Xu
Small-scale challenges to CDM cosmology require a deeper understanding of dark matter physics.This paper aims to develop maximum entropy distributions for dark matter particle v…
Inverse mass cascade in dark matter flow and effects on halo deformation, energy, size, and density profiles
Zhijie, Xu
Inverse mass cascade is a key feature of the intermediate statistically steady state for self-gravitating collisionless dark matter flow (SG-CFD). This paper focus on effects of ma…
Universal spectrum and scaling laws for halo mass function, structure, and dark matter mass constraints
Zhijie Xu
Between the linear and nonlinear regimes, we identify a universal transition range centered on a characteristic halo mass , within which gravitational dynamics self…