Centrality Dependence of Thermal Parameters Deduced from Hadron Multiplicities in Au + Au Collisions at sqrt{s_{NN}} = 130\ GeV

We analyse the centrality dependence of thermal parameters deduced from hadron multiplicities in Au + Au collisions at sqrt{s_{NN}} = 130\ GeV. While the chemical freeze-out temperature and chemical potentials are found to be roughly centrality-independent, the strangeness saturation factor gamma_S increases with participant number towards unity, supporting the assumption of equilibrium freeze-out conditions in central collisions.