The MillenniumTNG Project: The galaxy population at $z\ge 8$

Abstract

The early release science results from $\text{JWST}$ have yielded an unexpected abundance of high-redshift luminous galaxies that seems to be in tension with current theories of galaxy formation. However, it is currently difficult to draw definitive conclusions form these results as the sources have not yet been spectroscopically confirmed. It is in any case important to establish baseline predictions from current state-of-the-art galaxy formation models that can be compared and contrasted with these new measurements. In this work, we use the new large-volume ($L_{\mathrm{box}}\sim 740\mathrm{cMpc}$) hydrodynamic simulation of the MillenniumTNG project, suitably scaled to match results from higher resolution - smaller volume simulations, to make predictions for the high-redshift ($z\gtrsim 8$) galaxy population and compare them to recent $\text{JWST}$ observations. We show that the simulated galaxy population is broadly consistent with observations until $z\sim 10$. From $z\approx 10-12$, the observations indicate a preference for a galaxy population that is largely dust-free, but is still consistent with the simulations. Beyond $z\gtrsim 12$, however, our simulation results underpredict the abundance of luminous galaxies and their star-formation rates by almost an order of magnitude. This indicates either an incomplete understanding of the new $\text{JWST}$ data or a need for more sophisticated galaxy formation models that account for additional physical processes such as Population~III stars, variable stellar initial mass functions, or even deviations from the standard $\Lambda$CDM model. We emphasise that any new process invoked to explain this tension should only significantly influence the galaxy population beyond $z\gtrsim 10$, while leaving the successful galaxy formation predictions of the fiducial model intact below this redshift.

arXiv commentAccepted for publication in MNRAS -- Part of the initial set of papers introducing the MillenniumTNG project. Visit www.mtng-project.org for more details

References in corpus (82)

• Cosmic Star Formation History
• The Origin of the Mass--Metallicity Relation: Insights from 53,000 Star-Forming Galaxies in the SDSS
• E pur si muove: Galiliean-invariant cosmological hydrodynamical simulations on a moving mesh
• Cosmological SPH simulations: A hybrid multi-phase model for star formation
• Introducing the Illustris Project: Simulating the coevolution of dark and visible matter in the Universe
• Simulating Galaxy Formation with the IllustrisTNG Model
• First results from the IllustrisTNG simulations: matter and galaxy clustering
• First results from the IllustrisTNG simulations: the stellar mass content of groups and clusters of galaxies
• Mass function of dark matter halos
• First results from the IllustrisTNG simulations: the galaxy color bimodality
• Metallicity Calibrations and the Mass-Metallicity Relation for Star-Forming Galaxies
• Galactic star formation and accretion histories from matching galaxies to dark matter haloes
• Properties of galaxies reproduced by a hydrodynamic simulation
• First results from the IllustrisTNG simulations: A tale of two elements -- chemical evolution of magnesium and europium
• Simulating galaxy formation with black hole driven thermal and kinetic feedback
• UV Luminosity Functions at redshifts z~4 to z~10: 10000 Galaxies from HST Legacy Fields
• UniverseMachine: The Correlation between Galaxy Growth and Dark Matter Halo Assembly from z=0-10
• First results from the IllustrisTNG simulations: radio haloes and magnetic fields
• First Results from the TNG50 Simulation: Galactic outflows driven by supernovae and black hole feedback
• A model for cosmological simulations of galaxy formation physics
• The effect of photo-ionization on the cooling rates of enriched, astrophysical plasmas
• Binary Population and Spectral Synthesis Version 2.1: construction, observational verification and new results
• First Results from the TNG50 Simulation: The evolution of stellar and gaseous disks across cosmic time
• Constraining the Low-Mass Slope of the Star Formation Sequence at 0.5<z<2.5
• The Galactic disk mass function: reconciliation of the HST and nearby determinations
• The Evolution of the Galaxy Rest-Frame Ultraviolet Luminosity Function Over the First Two Billion Years
• The optical morphologies of galaxies in the IllustrisTNG simulation: a comparison to Pan-STARRS observations
• Two Remarkably Luminous Galaxy Candidates at $z\approx 10-12$ Revealed by JWST
• The evolution of the galaxy UV luminosity function at redshifts z ~ 8-15 from deep JWST and ground-based near-infrared imaging
• EMERGE - An empirical model for the formation of galaxies since $z\sim 10$
• Simulating cosmic structure formation with the GADGET-4 code
• The Dearth of z~10 Galaxies in all HST Legacy Fields -- The Rapid Evolution of the Galaxy Population in the First 500 Myr
• Directly Observing the Galaxies Likely Responsible for Reionization
• A Long Time Ago in a Galaxy Far, Far Away: A Candidate z ~ 12 Galaxy in Early JWST CEERS Imaging
• Early results from GLASS-JWST. III: Galaxy candidates at z$\sim$9-15
• An ALMA [CII] survey of 27 quasars at z>5.94
• The Size Evolution of Star-forming and Quenched Galaxies in the IllustrisTNG simulation
• The star-formation activity of IllustrisTNG galaxies: main sequence, UVJ diagram, quenched fractions, and systematics
• Full-Data Results of Hubble Frontier Fields: UV Luminosity Functions at $z\sim 6-10$ and a Consistent Picture of Cosmic Reionization
• The chemical enrichment in the early Universe as probed by JWST via direct metallicity measurements at z~8
• ALMA Spectroscopic Survey in the Hubble Ultra Deep Field: The Infrared Excess of UV-selected z=2-10 galaxies as a function of UV-continuum Slope and Stellar Mass
• The Galaxy UV Luminosity Function Before the Epoch of Reionization
• The z = 9-10 galaxy population in the Hubble Frontier Fields and CLASH surveys: The z=9 LF and further evidence for a smooth decline in UV luminosity at z >= 8
• The Extreme Faint End of the UV Luminosity Function at $z\sim 6$ Through Gravitational Telescopes: a comprehensive assessment of strong lensing uncertainties
• Introducing the THESAN project: radiation-magnetohydrodynamic simulations of the epoch of reionization
• The evolution of the mass-metallicity relation in IllustrisTNG
• A lack of evolution in the very bright-end of the galaxy luminosity function from z = 8-10
• On the Stellar Populations of Galaxies at z=9-11: The Growth of Metals and Stellar Mass at Early Times
• The BlueTides Simulation: First Galaxies and Reionization
• Morphology and star formation in IllustrisTNG: the build-up of spheroids and discs
• Semi-analytic forecasts for JWST - I. UV luminosity functions at z = 4 - 10
• Cosmic Reionization On Computers I. Design and Calibration of Simulations
• The JWST Extragalactic Mock Catalog: Modeling galaxy populations from the UV through the near-IR over thirteen billion years of cosmic history
• Galaxy Stellar Mass Functions from z~10 to z~6 using the Deepest Spitzer/IRAC Data: No Significant Evolution in the Stellar-to-Halo Mass Ratio of Galaxies in the First Gyr of Cosmic Time
• Essential physics of early galaxy formation
• High redshift JWST predictions from IllustrisTNG: Dust modelling and galaxy luminosity functions
• Scientific Discovery with the James Webb Space Telescope
• Extreme Value Statistics of the Halo and Stellar Mass Distributions at High Redshift: are JWST Results in Tension with ΛCDM?
• Evolution of the galaxy stellar mass functions and UV luminosity functions at $z=6-9$ in the Hubble Frontier Fields
• The ASTRID simulation: the evolution of Supermassive Black Holes
• The Universe at z>10: Predictions for JWST from the UniverseMachine DR1
• Synthetic Galaxy Images and Spectra from the Illustris Simulation
• First Light And Reionisation Epoch Simulations (FLARES) I: Environmental Dependence of High-Redshift Galaxy Evolution
• The ASTRID Simulation: Galaxy Formation and Reionization
• A Lower Bound of Star Formation Activity in Ultra-high Redshift Galaxies Detected with JWST: Implications for Stellar Populations and Radiation Sources
• The THESAN project: properties of the intergalactic medium and its connection to Reionization-era galaxies
• AREPO-RT: Radiation hydrodynamics on a moving mesh
• A Search for H-Dropout Lyman Break Galaxies at z~12-16
• The THESAN project: Lyman-alpha emission and transmission during the Epoch of Reionization
• Spatially Resolved Star Formation and Inside-out Quenching in the TNG50 Simulation and 3D-HST Observations
• JWST unveils heavily obscured (active and passive) sources up to z~13
• Hints of Early Dark Energy in Planck, SPT, and ACT data: new physics or systematics?
• High-Redshift Galaxies from Early JWST Observations: Constraints on Dark Energy Models
• The THESAN project: predictions for multi-tracer line intensity mapping in the epoch of reionization
• Early Low-Mass Galaxies and Star-Cluster Candidates at z~6-9 Identified by the Gravitational Lensing Technique and Deep Optical/Near-Infrared Imaging
• Probing the Bright End of the Rest-Frame Ultraviolet Luminosity Function at z = 8-10 with Hubble Pure-Parallel Imaging
• JWST/NIRCam Observations of Stars and HII Regions in $z\simeq 6-8$ Galaxies: Properties of Star Forming Complexes on 150 pc Scales
• A lensed protocluster candidate at $z=7.66$ identified in JWST observations of the galaxy cluster SMACS0723-7327
• The Physical Properties of Luminous $z\gtrsim 8$ Galaxies and Implications for the Cosmic Star Formation Rate Density From $\sim$0.35 deg${}^2$ of (Pure-)Parallel HST Observations
• Implications of a Temperature Dependent IMF I: Photometric Template Fitting
• SuperBoRG: Exploration of point sources at $z\sim 8$ in HST parallel fields
• An Effective Bias Expansion for 21 cm Cosmology in Redshift Space

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• RIGEL: Simulating dwarf galaxies at solar mass resolution with radiative transfer and feedback from individual massive stars
• Density modulated star formation efficiency: implications for the observed abundance of ultra-violet luminous galaxies at z>10
• The MillenniumTNG Project: Semi-analytic galaxy formation models on the past lightcone
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• Simulating ionization feedback from young massive stars: impact of numerical resolution
• Witnessing an extreme, highly efficient galaxy formation mode with resolved Ly$\alpha$ and LyC emission
• The impact of baryons on the internal structure of dark matter haloes from dwarf galaxies to superclusters in the redshift range 0<z<7
• The THESAN-ZOOM project: Population III star formation continues until the end of reionization
• Investigating the galaxy-halo connection of DESI Emission-Line Galaxies with SHAMe-SF
• The THESAN-ZOOM project: Star-formation efficiencies in high-redshift galaxies
• The THESAN-ZOOM project: Star formation efficiency from giant molecular clouds to galactic scale in high-redshift starbursts
• Investigating cosmic strings using large-volume hydrodynamical simulations in the context of JWST's massive UV-bright galaxies
• Unveiling dust, molecular gas, and high star formation efficiency in extremely UV bright star-forming galaxies at $z\sim 2.1-3.6$
• Differences in baryonic and dark matter scaling relations of galaxy clusters: A comparison between IllustrisTNG simulations and observations
• Evolution of Size, Mass, and Density of Galaxies Since Cosmic Dawn
• The THESAN project: environmental drivers of Local Group reionization
• The Cosmic Rush Hour: Rapid Formation of Bright, Massive, Disky, Star-Forming Galaxies as Signatures of Early-Universe Physics