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Published on: December 4, 2017
Nonequilibrium stationary states of 3D self-gravitating systems
Fernanda P C Benetti1, Ana C Ribeiro-Teixeira1, Renato Pakter1
1Instituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, CEP 91501-970, Porto Alegre, Rio Grande do Sul, Brazil.
Abstract:
Three-dimensional self-gravitating systems do not evolve to thermodynamic equilibrium but become trapped in nonequilibrium quasistationary states. In this Letter, we present a theory which allows us to a priori predict the particle distribution in a final quasistationary state to which a self-gravitating system will evolve from an initial condition which is isotropic in particle velocities and satisfies a virial constraint 2K=-U, where K is the total kinetic energy, and U is the potential energy of the system.
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