264 citations · 1.6k across the 43 of their papers we have counts for
43 papers
Efficient Reionization in a Large Hydrodynamic Galaxy Formation Simulation
James E. Davies, Simeon Bird, Simon Mutch +5
Accuracy in the topology and statistics of a simulated Epoch of Reionization (EoR) are vital to draw connections between observations and physical processes. While full radiative t…
Dark-ages reionization and galaxy formation simulation -- XXI. Constraining the evolution of the ionizing escape fraction
Simon J. Mutch, Bradley Greig, Yuxiang Qin +2
The fraction of ionizing photons that escape their host galaxies to ionize hydrogen in the inter-galactic medium (IGM) is a critical parameter in analyses of the reionization era.…
Thermal and Reionisation History within a Large-Volume Semi-Analytic Galaxy Formation Simulation
Sreedhar Balu, Bradley Greig, Yisheng Qiu +4
We predict the 21-cm global signal and power spectra during the Epoch of Reionisation using the MERAXES semi-analytic galaxy formation and reionisation model, updated to include X-…
Generating extremely large-volume reionisation simulations
Bradley Greig, J. Stuart B. Wyithe, Steven G. Murray +2
Preparing for the first detection of the cosmic 21-cm signal from large-scale interferometer experiments requires rigorous testing of the data analysis and reduction pipelines. To…
The Prevalence of Galaxy Overdensities Around UV-Luminous Lyman Emitters in the Epoch of Reionization
E. Leonova, P. A. Oesch, Y. Qin +19
Before the end of the epoch of reionization, the Hydrogen in the Universe was predominantly neutral. This leads to a strong attenuation of Ly lines of galaxies in th…
Dark-ages Reionization and Galaxy Formation Simulation XX. The Ly IGM transmission properties and environment of bright galaxies during the Epoch of Reionization
Yuxiang Qin, J. Stuart B. Wyithe, Pascal A. Oesch +4
The highly neutral inter-galactic medium (IGM) during the Epoch of Reionization (EoR) is expected to suppress Ly emission with damping-wing absorption, causing nearly no Ly d…
Ultra-fast model emulation with PRISM; analyzing the Meraxes galaxy formation model
Ellert van der Velden, Alan R. Duffy, Darren Croton +1
We demonstrate the potential of an emulator-based approach to analyzing galaxy formation models in the domain where constraining data is limited. We have applied the open-source Py…
Exploring reionisation and high-z galaxy observables with recent multi-redshift MWA upper limits on the 21-cm signal
Bradley Greig, Cathryn M. Trott, Nichole Barry +4
We use the latest multi-redshift () upper limits on the 21-cm signal from the Murchison Widefield Array (MWA) to explore astrophysical models which are inconsistent with…
An efficient hybrid method to produce high resolution large volume dark matter simulations for semi-analytic models of reionisation
Yisheng Qiu, Simon J. Mutch, Pascal J. Elahi +3
Resolving faint galaxies in large volumes is critical for accurate cosmic reionisation simulations. While less demanding than hydrodynamical simulations, semi-analytic reionisation…
Dark-ages reionization and galaxy formation simulation -- XVIII. The high-redshift evolution of black holes and their host galaxies
Madeline A. Marshall, Simon J. Mutch, Yuxiang Qin +2
Correlations between black holes and their host galaxies provide insight into what drives black hole-host co-evolution. We use the Meraxes semi-analytic model to investigate the gr…
Evolution of black hole and galaxy growth in a semi-numerical galaxy formation model
Mackenzie L. Jones, R. C. Hickox, S. J. Mutch +3
We present a simple semi-numerical model designed to explore black hole growth and galaxy evolution. This method builds on a previous model for black hole accretion that uses a sem…
Dark-ages Reionization and Galaxy Formation Simulation -- XIX: Predictions of infrared excess and cosmic star formation rate density from UV observations
Yisheng Qiu, Simon J. Mutch, Elisabete da Cunha +2
We present a new analysis of high-redshift UV observations using a semi-analytic galaxy formation model, and provide self-consistent predictions of the infrared excess (IRX) -- …
Dark-Ages Reionisation & Galaxy Formation Simulation XVI: The Thermal Memory of Reionisation
James E. Davies, Simon J. Mutch, Yuxiang Qin +3
Intergalactic medium temperature is a powerful probe of the epoch of reionisation, as information is retained long after reionisation itself. However, mean temperatures are highly…
Model dispersion with PRISM; an alternative to MCMC for rapid analysis of models
Ellert van der Velden, Alan R. Duffy, Darren Croton +2
We have built PRISM, a "Probabilistic Regression Instrument for Simulating Models". PRISM uses the Bayes linear approach and history matching to construct an approximation ('emulat…
Dark-ages Reionization and Galaxy Formation Simulation - XV. Stellar evolution and feedback in dwarf galaxies at high redshift
Yuxiang Qin, Alan R. Duffy, Simon J. Mutch +3
We directly compare predictions of dwarf galaxy properties in a semi-analytic model (SAM) with those extracted from a high-resolution hydrodynamic simulation. We focus on galaxies…
GLACiAR, an open-source python tool for simulations of source recovery and completeness in galaxy surveys
Daniela Carrasco, Michele Trenti, Simon Mutch +1
The luminosity function is a fundamental observable for characterizing how galaxies form and evolve throughout the cosmic history. One key ingredient to derive this measurement fro…
The Cosmic Web Around The Brightest Galaxies During The Epoch Of Reionization
Keven Ren, Michele Trenti, Simon J. Mutch
The most luminous galaxies at high-redshift are generally considered to be hosted in massive dark-matter halos of comparable number density, hence residing at the center of overden…
Dark-ages Reionization and Galaxy Formation Simulation - XIV. Gas accretion, cooling and star formation in dwarf galaxies at high redshift
Yuxiang Qin, Alan R. Duffy, Simon J. Mutch +4
We study dwarf galaxy formation at high redshift () using a suite of high- resolution, cosmological hydrodynamic simulations and a semi-analytic model (SAM). We focus on gas…
Convergence properties of halo merger trees; halo and substructure merger rates across cosmic history
Gregory B. Poole, Simon J. Mutch, Darren J. Croton +1
We introduce gbpTrees: an algorithm for constructing merger trees from cosmological simulations, designed to identify and correct for pathological cases introduced by errors or amb…
Do you see what I see? Exploring the consequences of luminosity limits in black hole-galaxy evolution studies
Mackenzie L. Jones, Ryan C. Hickox, Simon J. Mutch +3
In studies of the connection between active galactic nuclei (AGN) and their host galaxies there is widespread disagreement on some key aspects stemming largely from a lack of under…
Dark ages reionization & galaxy formation simulation XII: Bubbles at dawn
Paul M. Geil, Simon J. Mutch, Gregory B. Poole +3
Direct detection of regions of ionized hydrogen (HII) has been suggested as a promising probe of cosmic reionization. Observing the redshifted 21-cm signal of hydrogen from the epo…
Dark-ages Reionization and Galaxy Formation Simulation - XIII. AGN quenching of high-redshift star formation in ZF-COSMOS-20115
Yuxiang Qin, Simon J. Mutch, Alan R. Duffy +4
Massive quiescent galaxies (MQGs) are thought to have formed stars rapidly at early times followed by a long period of quiescence. The recent discovery of a MQG, ZF-COSMOS-20115 at…
Dark-ages reionization and galaxy formation simulation XI: Clustering and halo masses of high redshift galaxies
Jaehong Park, Han-Seek Kim, Chuanwu Liu +7
We investigate the clustering properties of Lyman-break galaxies (LBGs) at - . Using the semi-analytical model {\scshape Meraxes} constructed as part of the Dark-ages R…
Dark-ages Reionization and Galaxy Formation Simulation - X. The small contribution of quasars to reionization
Yuxiang Qin, Simon J. Mutch, Gregory B. Poole +6
Motivated by recent measurements of the number density of faint AGN at high redshift, we investigate the contribution of quasars to reionization by tracking the growth of central s…