A robust measure of cosmic structure beyond the power spectrum: Cosmic filaments and the temperature of dark matter

Danail Obreschkow, Chris Power, M. Bruderer, C. Bonvin

    Research output: Contribution to journalArticle

    20 Citations (Scopus)

    Abstract

    We discover that the mass of dark matter particles m DM is imprinted in phase correlations of the cosmic density field more significantly than in the two-point correlation. In particular, phase correlations trace m DM out to scales about five times larger than the two-point correlation. This result relies on a new estimator ℓ(r) of pure phase information in Fourier space, which can be interpreted as a parameter-free and scale-invariant tracer of filament-like structure. Based on simulated density fields, we show how m DM can, in principle, be measured using ℓ(r), given a suitably reconstructed density field. © 2013. The American Astronomical Society. All rights reserved..
    Original languageEnglish
    Pages (from-to)Article number 115
    JournalThe Astrophysical Journal
    Volume762
    Issue number2
    DOIs
    Publication statusPublished - 2013

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