Cosmic String Wake Detection using 3D Ridgelet Transformations

Abstract

Three-dimensional ridgelet statistics are used to search for the signals of cosmic string wakes in the distribution of dark matter. We compare N-body simulations of the dark matter distribution in cosmological models with and without a cosmic string wake, assuming that the dominant sources of fluctuations are those predicted in the standard $\Lambda$CDM model. Cosmic string wakes lead to overdense regions with planar topology, and hence three-dimensional ridgelet statistics are a promising analysis tool. The string signal is easier identifiable for larger string tensions and at higher redshift. We find that a wake produced by a string of tension $G\mu =10^{-7}$ (a value slightly lower than the best current robust upper bound) can be detected at $6\sigma$ confidence level at a cosmological redshift $z=10$.

arXiv comment12 pages, 14 figures

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Cited by in corpus (3)

• Gravitational Wave Bursts as Harbingers of Cosmic Strings Diluted by Inflation
• Cosmic Filaments from Cosmic Strings
• Ridges in the Dark Energy Survey for cosmic trough identification