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Small Deviations from Gaussianity and The Galaxy Cluster Abundance Evolution

A. L. B. Ribeiro·C. A. Wuensche·P. S. Letelier
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Abstract

We raise the hypothesis that the density fluctuations field which originates the growth of large scale structures is a combination of two or more distributions. By applying the statistical analysis of finite mixture distributions to a specific combination of Gaussian plus non-Gaussian random fields, we studied the case where just a small departure from Gaussianity is allowed. Our results suggest that even a very small level of non-Gaussianity may introduce significant changes in the cluster abundance evolution rate.

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A. L. B. Ribeiro, C. A. Wuensche, P. S. Letelier. 2000-03-14. Small Deviations from Gaussianity and The Galaxy Cluster Abundance Evolution. https://doi.org/10.1086/309232

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