3 papers
astro-ph.CO2025
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…
astro-ph.CO2025
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…
astro-ph.CO2024
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…