中文

Small Deviations from Gaussianity and The Galaxy Cluster Abundance Evolution

天体物理学 2009-10-31 v1

摘要

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.

关键词

引用

@article{arxiv.astro-ph/0003193,
  title  = {Small Deviations from Gaussianity and The Galaxy Cluster Abundance Evolution},
  author = {A. L. B. Ribeiro and C. A. Wuensche and P. S. Letelier},
  journal= {arXiv preprint arXiv:astro-ph/0003193},
  year   = {2009}
}

备注

10 pages with 2 figures, accepted for publication in ApJ