57 citations · 130 across the 4 of their papers we have counts for
4 papers
Is the Radial Profile of the Phase-Space Density of Dark Matter Halos a Power-Law?
Chung-Pei Ma, Philip Chang, Jun Zhang
The latest cosmological N-body simulations find two intriguing properties for dark matter haloes: (1) their radial density profile, rho, is better fit by a form that flattens to a…
How to Grow a Healthy Merger Tree
Jun Zhang, Onsi Fakhouri, Chung-Pei Ma
We investigate seven Monte Carlo algorithms -- four old and three new -- for constructing merger histories of dark matter halos using the extended Press-Schechter (EPS) formalism b…
Conditional Mass Functions and Merger Rates of Dark Matter Halos in the Ellipsoidal Collapse Model
Jun Zhang, Chung-Pei Ma, Onsi Fakhouri
Analytic models based on spherical and ellipsoidal gravitational collapse have been used to derive the mass functions of dark matter halos and their progenitors (the conditional ma…
Measuring the Cosmic Shear in Fourier Space
Jun Zhang
We propose to measure the weak cosmic shear using the spatial derivatives of the galaxy surface brightness field. The measurement should be carried out in Fourier space, in which t…