An EAGLE view of the missing baryons

Abstract

Context. A significant fraction of the predicted baryons remains undetected in the local universe. We adopted the common assumption that a large fraction of the missing baryons corresponds to the hot (log T(K) = 5.5-7) phase of the Warm Hot Intergalactic Medium (WHIM). We base our missing baryons search on the scenario whereby the WHIM has been heated up via accretion shocks and galactic outflows, and is concentrated towards the filaments of the Cosmic Web. Aims. Our aim is to improve the observational search of the poorly detected hot WHIM. Methods. We detect the filamentary structure within the EAGLE simulation by applying the Bisous formalism to the galaxy distribution. In addition, we use the MMF/NEXUS+ classification of the large scale environment of the dark matter component in EAGLE. We then study the spatio-thermal distribution of the hot baryons within the extracted filaments. Results. While the filaments occupy only 5% of the full simulation volume, the diffuse hot intergalactic medium in filaments amounts to 23% $-$ 25% of the total baryon budget, or 79% $-$ 87% of all the hot WHIM. The most optimal filament sample, with a missing baryon mass fraction of 82%, is obtained by selecting Bisous filaments with a high galaxy luminosity density. For these filaments we derived analytic formulae for the radial gas density and temperature profiles, consistent with recent Planck SZ and CMB lensing observations within the central $r$~ 1 Mpc. Conclusions. Results from EAGLE suggest that the missing baryons are strongly concentrated towards the filament axes. Since the filament finding methods used here are applicable to galaxy surveys, a large fraction of the missing baryons can be localised by focusing the observational efforts on the central 1 Mpc regions of the filaments. Moreover, focusing on high galaxy luminosity density regions will optimise the observational signal.

22 pages, 16 figures, accepted for publication in Astronomy and Astrophysics (A&A)

References in corpus (49)

• The cosmological simulation code GADGET-2
• The EAGLE project: Simulating the evolution and assembly of galaxies and their environments
• Planck 2013 results. I. Overview of products and scientific results
• The EAGLE simulations of galaxy formation: calibration of subgrid physics and model variations
• How Filaments are Woven into the Cosmic Web
• Where are the Baryons?
• The Tenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Apache Point Observatory Galactic Evolution Experiment
• The effect of photo-ionization on the cooling rates of enriched, astrophysical plasmas
• Baryons in the Warm-Hot Intergalactic Medium
• The persistent cosmic web and its filamentary structure I: Theory and implementation
• The Baryon Census in a Multiphase Intergalactic Medium: 30% of the Baryons May Still Be Missing
• The EAGLE simulations of galaxy formation: public release of halo and galaxy catalogues
• Cosmological Shock Waves and Their Role in the Large Scale Structure of the Universe
• Tracing the cosmic web
• Detecting filamentary pattern in the cosmic web: a catalogue of filaments for the SDSS
• The Multiscale Morphology Filter: Identifying and Extracting Spatial Patterns in the Galaxy Distribution
• Colours and luminosities of z=0.1 simulated galaxies in the EAGLE simulations
• NEXUS: Tracing the Cosmic Web Connection
• Baryons in the CosmicWeb of IllustrisTNG - I: Gas in Knots, Filaments, Sheets and Voids
• The abundance, distribution, and physical nature of highly ionized oxygen OVI, OVII, and OVIII in IllustrisTNG
• An HST/COS Survey of the Low-Redshift IGM. I. Survey, Methodology, & Overall Results
• Probing the missing baryons with the Sunyaev-Zel'dovich effect from filaments
• SDSS DR7 superclusters. The catalogues
• A Search for Warm/Hot Gas Filaments Between Pairs of SDSS Luminous Red Galaxies
• The Extended Distribution of Baryons Around Galaxies
• Simulating the physical properties of dark matter and gas inside the cosmic web
• From voids to filaments: environmental transformations of galaxies in the SDSS
• The effects of baryons on the halo mass function
• The Cosmic Ballet II: Spin alignment of galaxies and haloes with large-scale filaments in the EAGLE simulation
• Shock-Heated Gas in the Large Scale Structure of the Universe
• Populations of filaments from the distribution of galaxies in numerical simulations
• Filaments in observed and mock galaxy catalogues
• The low-redshift intergalactic medium as seen in archival legacy Hubble/STIS and FUSE data
• Characterising filaments in the SDSS volume from the galaxy distribution
• Density and temperature of cosmic-web filaments on scales of tens of megaparsecs
• Absorption signatures of warm-hot gas at low redshift: Broad HI Lyman-Alpha Absorbers
• The effect of cosmic web filaments on the properties of groups and their central galaxies
• Cosmological baryon transfer in the SIMBA simulations
• Studying the WHIM with Gamma Ray Bursts
• The large-scale environment from cosmological simulations I: The baryonic cosmic web
• Missing baryons traced by the galaxy luminosity density in the large-scale WHIM filaments
• A survey of the thermal and non-thermal properties of cosmic filaments
• The abundance and physical properties of O VII and O VIII X-ray absorption systems in the EAGLE simulations
• Filaments from the galaxy distribution and from the velocity field in the local universe
• Hot WHIM counterparts of FUV OVI absorbers: Evidence in the line-of-sight towards quasar 3C 273
• Properties of brightest group galaxies in cosmic web filaments
• To be or not to be: hot WHIM absorption in the blazar PKS 2155-304 sight line?
• Detecting the neutral IGM in filaments with the SKA
• Cross Correlation of the Extragalactic Gamma-ray Background with Thermal Sunyaev-Zel'dovich Effect in the Cosmic Microwave Background

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• The SRG/eROSITA all-sky survey. X-ray emission from the warm-hot phase gas in long cosmic filaments
• Dissecting a miniature universe: A multi-wavelength view of galaxy quenching in the Shapley supercluster
• Cosmic metal invaders: Intergalactic OVII as a tracer of the warm-hot intergalactic medium within cosmic filaments in the EAGLE simulation
• COSMOS Brightest Group Galaxies -- III: Evolution of stellar ages
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• The Three Hundred project: Estimating the dependence of gas filaments on the mass of galaxy clusters
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• The correlations between galaxy properties in different environments of the cosmic web
• A WHIM origin for the soft excess emission in the Coma cluster
• The warm-hot intergalactic medium in inter-cluster filaments -- A forecast for HUBS observations based on eRASS1 superclusters
• Galaxy interactions in filaments and sheets: insights from EAGLE simulations
• A high-resolution view of the filament of gas between Abell 399 and Abell 401 from the Atacama Cosmology Telescope and MUSTANG-2
• The SRG/eROSITA All-Sky Survey: Large-scale view of the Centaurus cluster
• Robust detection of hot intragroup medium in optically selected, poor galaxy groups by eROSITA
• Detection of pure warm-hot intergalactic medium emission from a $7.2$ Mpc long filament in the Shapley supercluster using X-ray spectroscopy
• Tracing gaseous filaments connected to galaxy clusters: the case study of Abell 2744
• Relation between the local width and linear halo mass density of cosmic filaments
• Galaxy cluster photons alter the ionisation state of the nearby warm-hot intergalactic medium
• Probing the physical properties of the IGM using SRG/eROSITA spectra from blazars
• The Three Hundred: Gas Properties Outside of Galaxy Cluster with the WHIM Contribution and Detection
• Using photometric redshift data to improve the detection of galactic filaments with the Bisous model
• A New Census of the Universe's Entropy
• Impact of cosmic web on galaxy properties and their correlations: Insights from Principal Component Analysis
• Prospects for detecting the circum- and intergalactic medium in X-ray absorption using the extended intracluster medium as a backlight
• A positive correlation between broad HI Ly$\alpha$ absorptions and local overdensities of galaxies
• Cosmic backgrounds from the radio to the far-infrared: recent results and perspectives from cosmological and astrophysical surveys
• Exploring the evolution of red and blue galaxies in different cosmic web environments using IllustrisTNG simulation
• Galaxy quenching across the Cosmic Web: disentangling mass and environment with SDSS DR18
• Profiles of cosmic filaments since z=4.0 in cosmological hydrodynamical simulation
• The Scaling Relation between Galaxy Luminosity and WHIM Density from EAGLE Simulations with application to SDSS data
• X-ray emission in IllustrisTNG circum-cluster environments. II -- Possible origins of the soft X-ray excess emission
• Tracing correlations between galaxy properties across the Cosmic Web: An IllustrisTNG-based study
• Future Detections of the Warm-Hot Intergalactic Medium using Bright Power Law Sources with NewAthena