Collapse and evaporation of a canonical self-gravitating gas

We review the out-of-equilibrium properties of a self-gravitating gas of particles in the presence of a strong friction and a random force (canonical gas). We assume a bare diffusion coefficient of the form $D(\rho )=T{\rho }^{1\mathrm{/}n}$, where $\rho$ is the local particle density, so that the equation of state is $P(\rho )=D(\rho )\rho$. Depending on the spatial dimension $d$, the index $n$, the temperature $T$, and whether the system is confined to a finite box or not, the system can reach an equilibrium state, collapse or evaporate. This article focuses on the latter cases, presenting a complete dynamical phase diagram of the system.