A semi-analytic model of pairwise velocity distribution between dark matter halos.

We study the probability distribution function (PDF) of relative velocity between two different dark matter halos (i.e. pairwise velocity) with a set of high-resolution cosmological $N$-body simulations. We investigate the pairwise velocity PDFs over a wide range of halo masses of $10^{12.5-15}\, h^{-1}M_{\odot}$ and redshifts of $0

Keywords:

• Dark matter
• Free parameter
• Astrophysics
• Probability density function
• Galaxy
• Correlation function
• Halo
• Physics
• Redshift
• Relative velocity

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