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Globular clusters (GCs) are powerful tracers of galaxy assembly, frequently used to identify accreted substructure and reconstruct hierarchical merger histories. With advances in GC formation models and cosmological simulations, we can now…

Astrophysics of Galaxies · Physics 2026-04-10 Finn A. Pal , Sarah L. Martell , Elizabeth J. Iles

I present a large set of high resolution simulations, called CosmicGrowth Simulations, which were generated with either 8.6 billion or 29 billion particles. As the nominal cosmological model that can match nearly all observations on…

Cosmology and Nongalactic Astrophysics · Physics 2018-08-28 Y. P. Jing

Simulating the small-scale features and dynamics of the circumgalactic medium (CGM) is computationally challenging due to its large volume, low densities, multiphase structure, and chaotic environmental effects. Traditional mass-based…

Astrophysics of Galaxies · Physics 2026-03-09 Scott Lucchini , Cecilia Abramson , Cameron Hummels , Charlie Conroy , Lars Hernquist , Aaron Smith

Dwarf galaxies are thought of as the building blocks of large galaxies such as our Milky Way. This paper presents new high-resolution hydrodynamical simulations of dwarf galaxies and their intergalactic medium with the \texttt{GIZMO} code.…

Astrophysics of Galaxies · Physics 2025-06-06 Pei-Cheng Tung , Ke-Jung Chen

We apply and test a field-level emulator for non-linear cosmic structure formation in a volume matching next-generation surveys. Inferring the cosmological parameters and initial conditions from which the particular galaxy distribution of…

Cosmology and Nongalactic Astrophysics · Physics 2025-02-20 Matthew T. Scoggins , Matthew Ho , Francisco Villaescusa-Navarro , Drew Jamieson , Ludvig Doeser , Greg L. Bryan

Morphology is a powerful indicator of a galaxy's dynamical and merger history. It is strongly correlated with many physical parameters, including mass, star formation history and the distribution of mass. The Galaxy Zoo project collected…

We present the High-z Kinematic Corpus Z1, a structured machine-readable dataset of ALMA [C ii] 158 um morpho-kinematic data for 31 star-forming main-sequence galaxies at z = 4.26-5.68 drawn from the ALPINE survey (Jones et al. 2021; Le…

Astrophysics of Galaxies · Physics 2026-05-26 David C. Flynn

We present the Rhapsody-G suite of cosmological hydrodynamic AMR zoom simulations of ten massive galaxy clusters at the $M_{\rm vir}\sim10^{15}\,{\rm M}_\odot$ scale. These simulations include cooling and sub-resolution models for star…

Cosmology and Nongalactic Astrophysics · Physics 2018-12-12 Oliver Hahn , Davide Martizzi , Hao-Yi Wu , August E. Evrard , Romain Teyssier , Risa H. Wechsler

Galaxy haloes contain fundamental clues about the galaxy formation and evolution process: hierarchical cosmological models predict haloes to be ubiquitous, and to be (at least in part) the product of past merger and/or accretion events. The…

Astrophysics of Galaxies · Physics 2017-08-02 Denija Crnojević

The interplay of star formation and supernova (SN) feedback in galaxy formation is a key element for understanding galaxy evolution. Since these processes occur at small scales, it is necessary to have sub-grid models that recover their…

Astrophysics of Galaxies · Physics 2022-09-15 Arturo Nuñez-Castiñeyra , Emmanuel Nezri , Julien Devriendt , Romain Teyssier

In this paper we introduce the Farpoint simulation, the latest member of the Hardware/Hybrid Accelerated Cosmology Code (HACC) gravity-only simulation family. The domain covers a volume of (1000$h^{-1}$Mpc)$^3$ and evolves close to two…

Cosmology and Nongalactic Astrophysics · Physics 2022-03-01 Nicholas Frontiere , Katrin Heitmann , Esteban Rangel , Patricia Larsen , Adrian Pope , Imran Sultan , Thomas Uram , Salman Habib , Silvio Rizzi , Joe Insley

Modern cosmological surveys are delivering datasets characterized by unprecedented quality and statistical completeness; this trend is expected to continue into the future as new ground- and space-based surveys come online. In order to…

Cosmology and Nongalactic Astrophysics · Physics 2022-12-21 Kelly R. Moran , Katrin Heitmann , Earl Lawrence , Salman Habib , Derek Bingham , Amol Upadhye , Juliana Kwan , David Higdon , Richard Payne

The Astro2020 Decadal Survey has identified the mapping of the circumgalactic medium (CGM, gaseous plasma around galaxies) as a key objective. We explore the prospects for characterizing the CGM in and around nearby galaxy halos with a…

Accumulating evidence suggests that galaxy interactions play an important role in shaping the properties of galaxies. For this reason, cosmological studies focused on the evolution of halo/subhalo pairs are vital. In this paper I describe a…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-28 Jorge Moreno

Hydrodynamical cosmological simulations are increasing their level of realism by considering more physical processes and having greater resolution or larger statistics. However, usually either the statistical power of such simulations or…

We review recent progress in the description of the formation and evolution of galaxy clusters in a cosmological context by using numerical simulations. We focus our presentation on the comparison between simulated and observed X-ray…

Cosmology and Nongalactic Astrophysics · Physics 2014-03-05 Stefano Borgani , Andrey Kravtsov

We present a model for the satellites of the Milky Way in which galaxy formation is followed using semi-analytic techniques applied to the six high-resolution N-body simulations of galactic halos of the Aquarius project. The model,…

Using the N-body simulations of the AEMULUS Project, we construct an emulator for the non-linear clustering of galaxies in real and redshift space. We construct our model of galaxy bias using the halo occupation framework, accounting for…

Cosmology and Nongalactic Astrophysics · Physics 2019-04-03 Zhongxu Zhai , Jeremy L. Tinker , Matthew R. Becker , Joseph DeRose , Yao-Yuan Mao , Thomas McClintock , Sean McLaughlin , Eduardo Rozo , Risa H. Wechsler

The role that minor mergers have played in the formation and structure of the Milky Way is still an open question, about which there is much debate. We use numerical simulations to explore the evolution of debris from a tidally disrupted…

Astrophysics · Physics 2009-10-28 Kathryn V. Johnston , Lars Hernquist , Michael Bolte

We present analysis of the evolution of dark matter halos in dense environments of groups and clusters in dissipationless cosmological simulations. The premature destruction of halos in such environments, known as the overmerging, reduces…

Astrophysics · Physics 2009-10-30 Anatoly Klypin , Stefan Gottloeber , Andrey Kravtsov , Alexei Khokhlov