Using kinetic theory to examine a self-gravitating system composed of baryons and cold dark matter

Abstract

We examine the evolution of non-relativistic cold dark matter gravitationally coupled to baryons with modes deep inside the Hubble radius (sub-horizon regime) using akinetic theory approach within the realm of Newtonian theory. We obtain the general solution for the total density perturbation and we also show that a baryon perturbation catches up with the dark matter perturbation at late times, which in turn makes possible the formation of bound structures. We extend the linear perturbation analysis by considering the turn-around event, the collapse of matter, and its virialization process.

arXiv comment11 pages, 4 figures

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Cited by in corpus (3)

• Jeans instability in an expanding universe with dissipation
• Jeans instability for an inert binary mixture: a kinetic theory approach in the Euler regime
• Jeans Instability from post-Newtonian Boltzmann equation