Revealing the Dark Threads of the Cosmic Web

Abstract

Modern cosmology predicts that matter in our Universe has assembled today into a vast network of filamentary structures colloquially termed the Cosmic Web. Because this matter is either electromagnetically invisible (i.e., dark) or too diffuse to image in emission, tests of this cosmic web paradigm are limited. Wide-field surveys do reveal web-like structures in the galaxy distribution, but these luminous galaxies represent less than 10% of baryonic matter. Statistics of absorption by the intergalactic medium (IGM) via spectroscopy of distant quasars support the model yet have not conclusively tied the diffuse IGM to the web. Here, we report on a new method inspired by the Physarum polycephalum slime mold that is able to infer the density field of the Cosmic Web from galaxy surveys. Applying our technique to galaxy and absorption-line surveys of the local Universe, we demonstrate that the bulk of the IGM indeed resides in the Cosmic Web. From the outskirts of Cosmic Web filaments, at approximately the cosmic mean matter density (rho_m) and approx. 5 virial radii from nearby galaxies, we detect an increasing H I absorption signature towards higher densities and the circumgalactic medium, to approx. 200 rho_m. However, the absorption is suppressed within the densest environments, suggesting shock-heating and ionization deep within filaments and/or feedback processes within galaxies.

arXiv commentPublished in ApJL, 891, L35

References in corpus (63)

• The EAGLE project: Simulating the evolution and assembly of galaxies and their environments
• Mass and environment as drivers of galaxy evolution in SDSS and zCOSMOS and the origin of the Schechter function
• Spectroscopic Target Selection in the Sloan Digital Sky Survey: The Main Galaxy Sample
• Quantifying the bimodal color-magnitude distribution of galaxies
• The Rockstar Phase-Space Temporal Halo Finder and the Velocity Offsets of Cluster Cores
• The Environmental Dependence of the Relations between Stellar Mass, Structure, Star Formation and Nuclear Activity in Galaxies
• How Filaments are Woven into the Cosmic Web
• The Circumgalactic Medium
• Differential Galaxy Evolution in Cluster and Field Galaxies at z=0.3
• MultiDark simulations: the story of dark matter halo concentrations and density profiles
• Cosmological Simulations of Intergalactic Medium Enrichment from Galactic Outflows
• The Large, Oxygen-Rich Halos of Star-Forming Galaxies Are A Major Reservoir of Galactic Metals
• The Low Redshift Lyman Alpha Forest in Cold Dark Matter Cosmologies
• Gravitational Collapse of Small-Scale Structure as the Origin of the Lyman Alpha Forest
• The COS-Halos Survey: Rationale, Design, and A Census of Circumgalactic Neutral Hydrogen
• Tracing the cosmic web
• The radial and azimuthal profiles of Mg II absorption around 0.5 < z < 0.9 zCOSMOS galaxies of different colors, masses and environments
• Detecting filamentary pattern in the cosmic web: a catalogue of filaments for the SDSS
• The persistent cosmic web and its filamentary structure II: Illustrations
• A High-Resolution Survey of Low-Redshift QSO Absorption Lines: Statistics and Physical Conditions of O VI Absorbers
• Why does the environmental influence on group and cluster galaxies extend beyond the virial radius?
• The Multiscale Morphology Filter: Identifying and Extracting Spatial Patterns in the Galaxy Distribution
• NEXUS: Tracing the Cosmic Web Connection
• The Half Million Quasars (HMQ) Catalogue
• On the possible environmental effect in distributing heavy elements beyond individual gaseous halos
• MAGIICAT II. General Characteristics of the MgII Absorbing Circumgalactic Medium
• The Relationship Between Galaxies and Low Redshift Weak Lyman alpha Absorbers in the Directions of H1821+643 and PG1116+215
• Simple Models of Metal-Line Absorption and Emission from Cool Gas Outflows
• The intergalactic medium over the last 10 billion years I: Lyman alpha absorption and physical conditions
• The Environment of Lyman a Absorbers in the Sightline toward 3C273
• Environmentally-Driven Evolution of Simulated Cluster Galaxies
• Detecting Effects of Filaments on Galaxy Properties in the Sloan Digital Sky Survey III
• The Relationship Between Intergalactic HI/OVI and Nearby (z<0.017) Galaxies
• The Local Lya Forest. III. Relationship between Lya Absorbers and Galaxies, Voids and Superclusters
• Probing the IGM-Galaxy Connection at z < 0.5 I: A Galaxy Survey in QSO Fields and a Galaxy-Absorber Cross-Correlation Study
• From voids to filaments: environmental transformations of galaxies in the SDSS
• A Deep Search For Faint Galaxies Associated With Very Low-redshift C IV Absorbers: III. The Mass- and Environment-dependent Circumgalactic Medium
• Quenching of Satellite Galaxies at the Outskirts of Galaxy Clusters
• The Suppression of Star Formation and the Effect of Galaxy Environment in Low-Redshift Galaxy Groups
• The properties of the cool circumgalactic gas probed with the SDSS, WISE and GALEX surveys
• Tracing baryons in the warm-hot intergalactic medium with broad Ly alpha absorption
• Properties of Dark Matter Halos as a Function of Local Environment Density
• On the connection between the intergalactic medium and galaxies: The HI-galaxy cross-correlation at z < 1
• FUV and X-ray absorption in the Warm-Hot Intergalactic Medium
• Cosmic Web Reconstruction through Density Ridges: Catalogue
• Absorption signatures of warm-hot gas at low redshift: Broad HI Lyman-Alpha Absorbers
• Towards the statistical detection of the warm-hot intergalactic medium in inter-cluster filaments of the cosmic web
• Warm-hot Gas in X-ray Bright Galaxy Clusters and the H I-deficient Circumgalactic Medium in Dense Environments
• The RESOLVE Survey Atomic Gas Census and Environmental Influences on Galaxy Gas Reservoirs
• HST/COS Spectra of Three QSOs That Probe The Circumgalactic Medium of a Single Spiral Galaxy: Evidence for Gas Recycling and Outflow
• Group quenching and galactic conformity at low redshift
• Dark Matter Halo Properties vs. Local Density and Cosmic Web Location
• CGM properties in VELA and NIHAO simulations; the OVI ionization mechanism: dependence on redshift, halo mass and radius
• The Influence of Environment on the Circumgalactic Medium
• Large Scale Structure in Absorption: Gas within and around Galaxy Voids
• Discriminating Topology in Galaxy Distributions using Network Analysis
• The COS Absorption Survey of Baryon Harbors: The Galaxy Database and Cross-Correlation Analysis of OVI Systems
• The Metallicity of Intergalactic Gas in Cosmic Voids
• Lyman-alpha Absorbers and the Coma Cluster
• Ultraviolet Signatures of the Multiphase Intracluster and Circumgalactic Media in the RomulusC Simulation
• Probing the Dependence of the Intergalactic Medium on Large Scale Environment Using the Low Redshift Lyman Alpha Forest
• A VLT/MUSE galaxy survey towards QSO Q1410: looking for a WHIM traced by BLAs in inter-cluster filaments
• H-ATLAS: The Far-Infrared properties of galaxies in and around the Coma Cluster

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• CGM${}^2$ I: The Extent of the Circumgalactic Medium Traced by Neutral Hydrogen
• Disentangling the Cosmic Web Towards FRB 190608
• The Evolving Effect Of Cosmic Web Environment On Galaxy Quenching
• A measurement of circumgalactic gas around nearby galaxies using fast radio bursts
• Thermal Instabilities and Shattering in the High-Redshift WHIM: Convergence Criteria and Implications for Low-Metallicity Strong HI Absorbers
• Swarm Intelligence-based Extraction and Manifold Crawling Along the Large-Scale Structure
• Monte Carlo Physarum Machine: Characteristics of Pattern Formation in Continuous Stochastic Transport Networks
• Relaxed blue ellipticals: accretion-driven stellar growth is a key evolutionary channel for low mass elliptical galaxies
• Entrainment of Hot Gas into Cold Streams: The Origin of Excessive Star-formation Rates at Cosmic Noon
• The relationship between gas and galaxies at z<1 using the Q0107 quasar triplet
• Evolution of CIV Absorbers. II. Where does CIV live?
• CGM${}^2$ $+$ CASBaH: The Mass Dependence of H~I Ly$\alpha$-Galaxy Clustering and the Extent of the CGM
• Cosmic voids and filaments from quantum gravity
• The four cosmic tidal web elements from the $\beta$-skeleton
• Galaxy assembly bias in the stellar-to-halo mass relation for red central galaxies from SDSS
• FRB Line-of-sight Ionization Measurement From Lightcone AAOmega Mapping Survey: the First Data Release
• The Seventeenth Data Release of the Sloan Digital Sky Surveys: Complete Release of MaNGA, MaStar and APOGEE-2 Data
• A Global Census of Metals in the Universe
• Identifying Circumgalactic Medium Absorption in QSO Spectra: A Bayesian Approach
• A positive correlation between broad HI Ly$\alpha$ absorptions and local overdensities of galaxies