Universal quasi-equilibrium state of self-gravitating systems not depending on dimensions

3rd International Conference on Mathematical Modeling in Physical Sciences

物理学;数学

Tashiro, Tohru^1

Department of Physics, Ochanomizu University, 2-1-1 Ohtsuka, Bunkyo, Tokyo

112-8610, Japan^1

关键词: Density profile;    Langevin equation;    Quasi-equilibrium state;    Random noise;    Self-gravitating systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/574/1/012154/pdf
DOI  :  10.1088/1742-6596/574/1/012154

来源: IOP

【 摘 要 】

We study a universality of self-gravitating systems in the quasi-equilibrium state. It is shown numerically that the two dimensional self-gravitating system in the quasi-equilibrium state has the same kind of density profile as the three dimensional one. We develop a model to describe this universal quasi-equilibrium state by using a special Langevin equation with a distinctive random noise to self-gravitating systems. We find that the density profile derived theoretically is consistent well with results of observations and simulations.