Cosmic Web Dissection in Fuzzy Dark Matter Cosmologies

Abstract

On large cosmological scales, anisotropic gravitational collapse is manifest in the dark cosmic web. Its statistical properties are little known for alternative dark matter models such as fuzzy dark matter (FDM). In this work, we assess for the first time the relative importance of cosmic nodes, filaments, walls and voids in a cosmology with primordial small-scale suppression of power. We post-process $N$-body simulations of FDM-like cosmologies with varying axion mass $m$ at redshifts $z\sim 1.0-5.6$ using the NEXUS+ Multiscale Morphology Filter technique at smoothing scale $\Delta x=0.04h^{-1}$Mpc. The formation of wall and void halos is more suppressed than naively expected from the half-mode mass $M_{1/2}$. Also, we quantify the mass and volume filling fraction of cosmic environments and find that 2D cosmic sheets host a larger share of the matter content of the Universe as $m$ is reduced, with an $\sim 8-12$\% increase for the $m=7\times 10^{-22}$ eV model compared to CDM. We show that in FDM-like cosmologies, filaments, walls and voids are cleaner and more pronounced structures than in CDM, revealed by a strong mid-range peak in the conditioned overdensity PDFs $P(\delta )$. At high redshift, low-density regions are more suppressed than high-density regions. Furthermore, skewness estimates $S_3$ of the total overdensity PDF in FDM-like cosmologies are consistently higher than in CDM, especially at high redshift $z\sim 5.6$ where the $m=10^{-22}$ eV model differs from CDM by $\sim 6\sigma$. Accordingly, we advocate for the usage of $P(\delta )$ as a testbed for constraining FDM and other alternative dark matter models.

16 pages, 7 figures

References in corpus (27)

• Ultralight scalars as cosmological dark matter
• Cosmic Structure as the Quantum Interference of a Coherent Dark Wave
• Massloss of galaxies due to a UV-background
• A search for ultra-light axions using precision cosmological data
• Stellar Feedback in Dwarf Galaxy Formation
• Late-time cosmology with 21cm intensity mapping experiments
• The Evolution of Dark Matter Halo Properties in Clusters, Filaments, Sheets and Voids
• AbacusSummit: A Massive Set of High-Accuracy, High-Resolution $N$-Body Simulations
• The VIMOS Public Extragalactic Redshift Survey (VIPERS): Galaxy segregation inside filaments at $z\simeq 0.7$
• The Lyman-alpha forest power spectrum from the XQ-100 Legacy Survey
• Possible observational evidence that cosmic filaments spin
• Discovery of a supercluster in the ZOA in Vela
• The effect of cosmic web filaments on the properties of groups and their central galaxies
• Caught in the cosmic web: Environmental effect on halo concentrations, shape, and spin
• Finding the missing baryons in the intergalactic medium with localized fast radio bursts
• Cosmological Structure Formation and Soliton Phase Transition in Fuzzy Dark Matter with Axion Self-Interactions
• Dark matter voids in the SDSS galaxy survey
• Cosmology and neutrino mass with the Minimum Spanning Tree
• Rivers of Gas I.: Unveiling The Properties of High Redshift Filaments
• On the Cosmic Web Elongation in Fuzzy Dark Matter Cosmologies: Effects on Density Profiles, Shapes and Alignments of Halos
• New fitting formula for cosmic non-linear density distribution
• Surrogate modelling the Baryonic Universe II: on forward modelling the colours of individual and populations of galaxies
• Evolution of skewness and kurtosis of cosmic density fields
• Constraining Primordial Non-Gaussianity with Moments of the Large Scale Density Field
• Degeneracies between baryons and dark matter: the challenge of constraining the nature of dark matter with JWST
• Clusters of galaxies and the cosmic web with SKA
• Complementary consistency test of the Copernican principle via Noether's theorem and machine learning forecasts

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• A theoretical view of the T-web statistical description of the cosmic web
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• The Power of the Cosmic Web
• Galaxy formation with wave/fuzzy dark matter: The core-halo structure and the solitonic imprint
• Interference in Fuzzy Dark Matter Filaments: Idealised Models and Statistics
• Caught in the cosmic web: environmental effects on subhalo abundance and internal density profiles
• Bending the web: exploring the impact of modified gravity on the density field and halo properties within the cosmic web
• A universal and physically motivated threshold for Hessian-based cosmic web identification: V-Web case
• Nearest neighbour analysis as a new probe for fuzzy dark matter