Non-linear evolution of the pre-whitened cosmological power spectrum

Details Non-linear evolution of the pre-whitened cosmological power spectrum Non-linear evolution of the pre-whitened cosmological power spectrum

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...204.0910r&link_type=abstract

American Astronomical Society Meeting 204, #09.10; Bulletin of the American Astronomical Society, Vol. 36, p.793

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We present some results from a study of the non-linear evolution of the cosmological matter power spectrum. Non-linear evolution of the power spectrum introduces correlations between the power on different scales, so that a 1:1 mapping of linear to non-linear power (e.g. the well-known Peacock & Dodds method) is neccessarily only an approximation. These correlations can be reduced significantly by the technique of ``pre-whitening''. We have used a set of scale-free, self-similar N-body simulations to investigate whether the pre-whitened power offers a better mapping.

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