SCALING RELATIONS FOR GRAVITATIONAL CLUSTERING IN 2 DIMENSIONS

It is known that radial collapse around density peaks can explain the key features of the evolution of a correlation function in gravitation al clustering in thr ee dimensions. The same model also makes specific predictions for two dimensions. In this paper we test these predictio ns in two dimensions with the help of N-body simulations. We find that there is no stable clustering in the extremely nonlinear regime, but a nonlinear scaling relation does exist and can be used to relate the linear and the nonlinear correlation function. In the intermediate reg ime, the simulations agree with the model.