title: Influence of expansion on hierarchical structure.
abstract: We study a one-dimensional model of gravitational instability in an Einstein-de Sitter universe. Scaling in both space and time results in an autonomous set of coupled Poisson-Vlasov equations for both the field and phase space density, and the N-body problem. Using dynamical simulation, we find direct evidence of hierarchical clustering. A multifractal analysis reveals a bifractal geometry similar to that observed in the distribution of galaxies. To demonstrate the role of scaling, we compare the system to other one-dimensional models recently employed to study structure formation. Finally we show that the model yields an estimate of the time of galaxy formation of the correct order.
authors.affiliation: Department of Physics and Astronomy, Texas Christian University, Fort Worth, Texas 76129, USA.
authors.forename: Bruce N
authors.initials: BN
authors.lastname: Miller
authors.forename: J L
authors.initials: JL
authors.lastname: Rouet