English

The Growth of Correlations in the Matter Power Spectrum

Astrophysics 2009-10-31 v2

Abstract

We find statistically significant correlations in the cosmological matter power spectrum over the full range of observable scales. While the correlations between individual modes are weak, the band-averaged power spectrum shows strong non-trivial correlations. The correlations are significant when the modes in either one or both bands are in the non-linear regime, and approach 100% for pairs of bands in which all the modes are non-linear. The correlations are weaker, but not absent, when computed in redshift space. Since estimates of the power spectrum from galaxy surveys require band-averaging, the correlations must be taken into account when comparing a measured power spectrum with theoretical models.

Keywords

Cite

@article{arxiv.astro-ph/9812129,
  title  = {The Growth of Correlations in the Matter Power Spectrum},
  author = {A. Meiksin and Martin White},
  journal= {arXiv preprint arXiv:astro-ph/9812129},
  year   = {2009}
}

Comments

7 pages, 6 Figures, accepted for publication to MNRAS. Revised