The Importance of Fourier Phases for the Morphology of Gravitational Clustering

Abstract

The phases of the Fourier modes appearing in a plane-wave expansion of cosmological density fields play a vital role in determining the morphology of gravitationally-developed clustering. We demonstrate this qualitatively and quantitatively using simulations. In particular, we use cross-correlation and rank-correlation techniques to quantify the agreement between a simulated distribution and phase-only reconstructions. The phase-only reconstructions exhibit a high degree of correlation with the original distributions, showing how meaningful spatial reconstruction of cosmological density fields depends more on phase accuracy than on amplitudes.

5 pages, 5 figures (with 2 added figures), accepted for publication in MNRAS

References in corpus (2)

• Characterizing the non-linear growth of large-scale structure in the Universe
• Phase Information and the Evolution of Cosmological Density Perturbations

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