One-Dimensional Hydrodynamical Simulations of Gravitational Clustering in an Expanding Background

The authors present the results of a series of one-dimensional N-body and hydrodynamical simulations which have been used for testing the different clustering properties of baryonic and dark matter in an expanding background. Initial Gaussian random density perturbations with a power-law spectrum are assumed. They analyse the distribution of density fluctuations and thermodynamical quantities for different spectral indices and discuss the statistical properties of clustering in the corresponding simulations.