Statistical mechanics of 1D self-gravitating systems: the core–halo distribution


E-mail: (TNT); (YL); (RP)


We study, using both theory and simulations, a system of self-gravitating sheets. A new statistical mechanics theory – free of any adjustable parameters is derived to quantitatively predict the final stationary state achieved by this system after the process of collisionless relaxation is completed. The theory shows a very good agreement with the numerical simulations. The model sheds new light on the general mechanism of relaxation of self-gravitating systems and may help us to understand cold matter distribution in the Universe.