Dark-ages reionization and galaxy formation simulation - III. Modelling galaxy formation and the epoch of reionization

Abstract

We introduce Meraxes, a new, purpose-built semi-analytic galaxy formation model designed for studying galaxy growth during reionization. Meraxes is the first model of its type to include a temporally and spatially coupled treatment of reionization and is built upon a custom (100 Mpc)${}^3$ N-body simulation with high temporal and mass resolution, allowing us to resolve the galaxy and star formation physics relevant to early galaxy formation. Our fiducial model with supernova feedback reproduces the observed optical depth to electron scattering and evolution of the galaxy stellar mass function between $z$=5 and 7, predicting that a broad range of halo masses contribute to reionization. Using a constant escape fraction and global recombination rate, our model is unable to simultaneously match the observed ionizing emissivity at $z\lesssim 6$. However, the use of an evolving escape fraction of 0.05-0.1 at $z\sim 6$, increasing towards higher redshift, is able to satisfy these three constraints. We also demonstrate that photoionization suppression of low mass galaxy formation during reionization has only a small effect on the ionization history of the inter-galactic medium. This lack of `self-regulation' arises due to the already efficient quenching of star formation by supernova feedback. It is only in models with gas supply-limited star formation that reionization feedback is effective at regulating galaxy growth. We similarly find that reionization has only a small effect on the stellar mass function, with no observationally detectable imprint at $M_{\ast }>10^{7.5}{\mathrm{M}}_{\odot }$. However, patchy reionization has significant effects on individual galaxy masses, with variations of factors of 2-3 at $z$=5 that correlate with environment.

30 pages, 18 figures; published in MNRAS; Updated to match published version. Additional results and fitting formulae added from previous version. All other results and conclusions remain unchanged

References in corpus (25)

• The EAGLE project: Simulating the evolution and assembly of galaxies and their environments
• The hierarchical formation of the brightest cluster galaxies
• A Semi-Analytic Model for the Co-evolution of Galaxies, Black Holes, and Active Galactic Nuclei
• Introducing the Illustris Project: the evolution of galaxy populations across cosmic time
• Strangulation as the primary mechanism for shutting down star formation in galaxies
• A primer on hierarchical galaxy formation: the semi-analytical approach
• The Importance of Satellite Quenching for the Build-Up of the Red Sequence of Present Day Galaxies
• Efficient Simulations of Early Structure Formation and Reionization
• The observed ionization rate of the intergalactic medium and the ionizing emissivity at z >5: Evidence for a photon starved and extended epoch of reionization
• The galaxy stellar mass function at 3.5<z<7.5 in the CANDELS/UDS, GOODS-South, and HUDF fields
• The mass evolution of the first galaxies: stellar mass functions and star formation rates at $4<z<7$ in the CANDELS GOODS-South field
• On the Lack of Evolution in Galaxy Star Formation Efficiency
• Radiative transfer simulations of cosmic reionization I: methodology and initial results
• The First Billion Years Project: The escape fraction of ionizing photons in the epoch of reionization
• Imprint of Inhomogeneous Hydrogen Reionization on the Temperature Distribution of the Intergalactic Medium
• Recovery from population III supernova explosions and the onset of second generation star formation
• UV Radiative Feedback During the Advanced Stages of Reionization
• Dark-ages reionization & galaxy formation simulation IV: UV luminosity functions of high-redshift galaxies
• Cosmological HII Bubble Growth During Reionization
• Current models of the observable consequences of cosmic reionization and their detectability
• Dark-ages Reionization & Galaxy Formation Simulation I: The dynamical lives of high redshift galaxies
• Scaling Relations for Galaxies Prior to Reionization
• Dark-ages Reionization & Galaxy Formation Simulation II: Spin and concentration parameters for dark matter haloes during the Epoch of Reionization
• Large-scale environment of z~5.7 CIV absorption systems I: projected distribution of galaxies
• Low-mass galaxy formation and the ionizing photon budget during reionization

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• Semi-analytic forecasts for JWST - I. UV luminosity functions at z = 4 - 10
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• Dark-ages reionization & galaxy formation simulation V: morphology and statistical signatures of reionization
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