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Predictions on the stellar-to-halo mass relation in the dwarf regime using the empirical model for galaxy formation EMERGE
Joseph A. O'Leary, Ulrich P. Steinwandel, Benjamin P. Moster +2
One of the primary goals when studying galaxy formation is to understand how the luminous component of the Universe, galaxies, relates to the growth of structure which is dominated…
Observational Measures of Halo Properties Beyond Mass
Peter Behroozi, Andrew Hearin, Benjamin P. Moster
Different properties of dark matter haloes, including growth rate, concentration, interaction history, and spin, correlate with environment in unique, scale-dependent ways. While t…
The Connection between Mergers and AGN Activity in Simulated and Observed Massive Galaxies
Ray S. Sharma, Ena Choi, Rachel S. Somerville +8
We analyze a suite of high resolution zoom-in cosmological hydrodynamic simulations of massive galaxies with stellar masses , with the goal of be…
Globular cluster numbers in dark matter haloes in a dual formation scenario: an empirical model within EMERGE
Lucas M. Valenzuela, Benjamin P. Moster, Rhea-Silvia Remus +2
We present an empirical model for the number of globular clusters (GCs) in galaxies based on recent data showing a tight relationship between dark matter halo virial masses and GC…
EMERGE: Constraining merging probabilities and timescales of close galaxy pairs
Joseph A. O'Leary, Benjamin P. Moster, Eva Krämer
Theoretical models are vital for exploring the galaxy merger process, which plays a crucial role in the evolution of galaxies. Recent advances in modelling have placed tight constr…
The Universe at z>10: Predictions for JWST from the UniverseMachine DR1
Peter Behroozi, Charlie Conroy, Risa H. Wechsler +8
The James Webb Space Telescope (JWST) is expected to observe galaxies at that are presently inaccessible. Here, we use a self-consistent empirical model, the UniverseMachine…
GalaxyNet: Connecting galaxies and dark matter haloes with deep neural networks and reinforcement learning in large volumes
Benjamin P. Moster, Thorsten Naab, Magnus Lindström +1
We present the novel wide & deep neural network GalaxyNet, which connects the properties of galaxies and dark matter haloes, and is directly trained on observed galaxy statistics u…
EMERGE: Empirical predictions of galaxy merger rates since
Joseph A. O'Leary, Benjamin P. Moster, Thorsten Naab +1
We explore the galaxy-galaxy merger rate with the empirical model for galaxy formation, Emerge. On average, we find that between per cent and per cent of massive galaxies…
Probing black hole accretion tracks, scaling relations and radiative efficiencies from stacked X-ray active galactic nuclei
Francesco Shankar, David H. Weinberg, Christopher Marsden +25
The masses of supermassive black holes at the centres of local galaxies appear to be tightly correlated with the mass and velocity dispersions of their galactic hosts. However, the…
The GRIFFIN project -- Formation of star clusters with individual massive stars in a simulated dwarf galaxy starburst
Natalia Lahén, Thorsten Naab, Peter H. Johansson +5
We describe a population of young star clusters (SCs) formed in a hydrodynamical simulation of a gas-rich dwarf galaxy merger resolved with individual massive stars at sub-parsec s…
Empirical constraints on the formation of early-type galaxies
Benjamin P. Moster, Thorsten Naab, Simon D. M. White
We present constraints on the formation and evolution of early-type galaxies (ETGs) with the empirical model EMERGE. The parameters of this model are adjusted so that it reproduces…
Predicting fully self-consistent satellite richness, galaxy growth and starformation rates from the STastical sEmi-Empirical modeL STEEL
Philip J. Grylls, F. Shankar, J. Leja +4
Observational systematics complicate comparisons with theoretical models limiting understanding of galaxy evolution. In particular, different empirical determinations of the stella…
Local photoionization feedback effects on galaxies
Aura Obreja, Andrea V. Macciò, Benjamin Moster +5
We implement an optically thin approximation for the effects of the local radiation field from stars and hot gas on the gas heating and cooling in the N-body SPH code GASOLINE2. We…
On the origin of magnetic driven winds and the structure of the galactic dynamo in isolated galaxies
Ulrich P. Steinwandel, Klaus Dolag, Harald Lesch +3
We investigate the build-up of the galactic dynamo and subsequently the origin of a magnetic driven outflow. We use a setup of an isolated disc galaxy with a realistic circum-galac…
Hot phase generation by supernovae: resolution, chemistry and thermal conduction
Ulrich P. Steinwandel, Benjamin P. Moster, Thorsten Naab +2
Supernovae (SN) generate hot gas in the interstellar medium (ISM), help setting the ISM structure and support the driving of outflows. It is important to resolve the hot gas genera…
Astro2020: Empirically Constraining Galaxy Evolution
Peter Behroozi, Matthew R. Becker, Frank C. van den Bosch +22
Over the past decade, empirical constraints on the galaxy-dark matter halo connection have significantly advanced our understanding of galaxy evolution. Past techniques have focuse…
Magnetic buoyancy in simulated galactic discs with a realistic circum galactic medium
Ulrich P. Steinwandel, Marcus C. Beck, Alexander Arth +3
We present simulations of isolated disc galaxies in a realistic environment performed with the Tree-SPMHD-Code Gadget-3. Our simulations include a spherical circum-galactic medium…
Introducing galactic structure finder: the multiple stellar kinematic structures of a simulated Milky Way mass galaxy
Aura Obreja, Andrea V. Macciò, Benjamin Moster +4
We present the first results of applying Gaussian Mixture Models in the stellar kinematic space of normalized angular momentum and binding energy on NIHAO high resolution galaxies…
NIHAO XVI: The properties and evolution of kinematically selected discs, bulges and stellar haloes
Aura Obreja, Aaron A. Dutton, Andrea V. Macciò +6
We use 25 simulated galaxies from the NIHAO project to define and characterize a variety of kinematic stellar structures: thin and thick discs, large scale single discs, classical…
Clustering Constraints on the Relative Sizes of Central and Satellite Galaxies
Andrew Hearin, Peter Behroozi, Andrey Kravtsov +1
We empirically constrain how galaxy size relates to halo virial radius using new measurements of the size- and stellar mass-dependent clustering of galaxies in the Sloan Digital Sk…
Recoiling Supermassive Black Hole Escape Velocities from Dark Matter Halos
Nick Choksi, Peter Behroozi, Marta Volonteri +4
We simulate recoiling black hole trajectories from to in dark matter halos, quantifying how parameter choices affect escape velocities. These choices include the stren…
EMERGE - An empirical model for the formation of galaxies since
Benjamin P. Moster, Thorsten Naab, Simon D. M. White
We present EMERGE, an Empirical ModEl for the foRmation of GalaxiEs, describing the evolution of individual galaxies in large volumes from to the present day. We assign a…
The Origin and Evolution of Fast and Slow Rotators in the Illustris Simulation
Zephyr Penoyre, Benjamin P. Moster, Debora Sijacki +1
Using the Illustris simulation, we follow thousands of elliptical galaxies back in time to identify how the dichotomy between fast and slow rotating ellipticals (FRs and SRs) devel…
From Discs to Bulges: effect of mergers on the morphology of galaxies
Rahul Kannan, Andrea V. Maccio', Fabio Fontanot +3
We study the effect of mergers on the morphology of galaxies by means of the simulated merger tree approach first proposed by Moster et al. This method combines N-body cosmological…