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Non-linear growth of the matter power spectrum P(k)

Related Links:

Baryonic P(k) features
Non-linear P(k) correlations

Virgo Consortium


ECCA Research

Non-linear evolution of clustering

One of the essential steps in using galaxy clustering for quantitative cosmology is to understand the non-linear development of gravitational instability. This requires numerical simulations, such as those performed by the Virgo Consortium. While an important source of numerical results for the growth of non-linar clustering, such calculations are no substitute for analytical understanding. Much of the simulation results may be understood through approximations [1], [2], [3]. Using these methods, it was demonstrated that different tracers of large-scale structure are all consistent with a single underlying linear matter power spectrum [1].

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