41 citations · 118 across the 15 of their papers we have counts for
15 papers
Emulator-Based Inference of Cosmological Subgrid Models
Nesar Ramachandra, Nicholas Frontiere, Michael Buehlmann +4
The formation of structure in the Universe at large scales is dominated by gravity, with baryonic physics becoming significant at scales. To capture the impact of b…
Modeling Galaxy Formation in Cosmological Simulations with CRK-HACC
Nicholas Frontiere, J. D. Emberson, Michael Buehlmann +4
Self-consistently modeling baryonic effects in survey-scale cosmological simulations has become increasingly important as the diversity, precision, and statistical reach of modern…
Cosmological Hydrodynamics at Exascale: A Trillion-Particle Leap in Capability
Nicholas Frontiere, J. D. Emberson, Michael Buehlmann +10
Resolving the most fundamental questions in cosmology requires simulations that match the scale, fidelity, and physical complexity demanded by next-generation sky surveys. To achie…
Illuminating the Physics of Dark Energy with the Discovery Simulations
Gillian D. Beltz-Mohrmann, Adrian Pope, Alex Alarcon +10
In this paper, we present the Discovery simulations: a new pair of high-resolution N-body simulations motivated by the DESI Y1 BAO cosmological constraints on dark energy. The Disc…
Advances in ArborX to support exascale applications
Andrey Prokopenko, Daniel Arndt, Damien Lebrun-Grandié +4
ArborX is a performance portable geometric search library developed as part of the Exascale Computing Project (ECP). In this paper, we explore a collaboration between ArborX and a…
The picasso gas model: Painting intracluster gas on gravity-only simulations
F. Kéruzoré, L. E. Bleem, N. Frontiere +5
We introduce picasso, a model designed to predict thermodynamic properties of the intracluster medium based on the properties of halos in gravity-only simulations. The predictions…
Exploring the Core-galaxy Connection
Isabele Souza Vitório, Michael Buehlmann, Eve Kovacs +3
Halo core tracking is a novel concept designed to efficiently follow halo substructure in large simulations. We have recently developed this concept in gravity-only simulations to…
Optimization and Quality Assessment of Baryon Pasting for Intracluster Gas using the Borg Cube Simulation
F. Kéruzoré, L. E. Bleem, M. Buehlmann +5
Synthetic datasets generated from large-volume gravity-only simulations are an important tool in the calibration of cosmological analyses. Their creation often requires accurate in…
Numerical Discreteness Errors in Multi-Species Cosmological N-body Simulations
Xin Liu, J. D. Emberson, Michael Buehlmann +2
We present a detailed analysis of numerical discreteness errors in two-species, gravity-only, cosmological simulations using the density power spectrum as a diagnostic probe. In a…
Modeling the Lyman- forest with Eulerian and SPH hydrodynamical methods
Solène Chabanier, J. D. Emberson, Zarija Lukić +6
We compare two state-of-the-art numerical codes to study the overall accuracy in modeling the intergalactic medium and reproducing Lyman- forest observables for DESI and high-re…
Cosmo-Paleontology: Statistics of Fossil Groups in a Gravity-Only Simulation
Aurora Cossairt, Michael Buehlmann, Eve Kovacs +3
We present a detailed study of fossil group candidates identified in "Last Journey", a gravity-only cosmological simulation covering a volume with a…
Simulating Hydrodynamics in Cosmology with CRK-HACC
Nicholas Frontiere, J. D. Emberson, Michael Buehlmann +4
We introduce CRK-HACC, an extension of the Hardware/Hybrid Accelerated Cosmology Code (HACC), to resolve gas hydrodynamics in large-scale structure formation simulations of the uni…
Physical Benchmarking for AI-Generated Cosmic Web
Xiaofeng Dong, Nesar Ramachandra, Salman Habib +3
The potential of deep learning based image-to-image translations has recently drawn a lot of attention; one intriguing possibility is that of generating cosmological predictions wi…
The AGORA High-resolution Galaxy Simulations Comparison Project. III: Cosmological zoom-in simulation of a Milky Way-mass halo
Santi Roca-Fàbrega, Ji-hoon Kim, Loic Hausammann +20
We present a suite of high-resolution cosmological zoom-in simulations to of a halo at , obtained using seven contemporary astrophysical simul…
Large-Scale Velocity Dispersion and the Cosmic Web
Michael Buehlmann, Oliver Hahn
Gravitational collapse in cosmological context produces an intricate cosmic web of voids, walls, filaments and nodes. The anisotropic nature of collisionless collapse leads to the…