282 citations · 2.2k across the 40 of their papers we have counts for
19 papers · 1 filter
The Last Journey. I. An Extreme-Scale Simulation on the Mira Supercomputer
Katrin Heitmann, Nicholas Frontiere, Esteban Rangel +10
The Last Journey is a large-volume, gravity-only, cosmological N-body simulation evolving more than 1.24 trillion particles in a periodic box with a side-length of 5.025Gpc. It was…
The Mira-Titan Universe. III. Emulation of the Halo Mass Function
Sebastian Bocquet, Katrin Heitmann, Salman Habib +5
We construct an emulator for the halo mass function over group and cluster mass scales for a range of cosmologies, including the effects of dynamical dark energy and massive neutri…
CosmoDC2: A Synthetic Sky Catalog for Dark Energy Science with LSST
Danila Korytov, Andrew Hearin, Eve Kovacs +27
This paper introduces cosmoDC2, a large synthetic galaxy catalog designed to support precision dark energy science with the Large Synoptic Survey Telescope (LSST). CosmoDC2 is the…
The Outer Rim Simulation: A Path to Many-Core Supercomputers
Katrin Heitmann, Hal Finkel, Adrian Pope +10
We describe the Outer Rim cosmological simulation, one of the largest high-resolution N-body simulations performed to date, aimed at promoting science to be carried out with large-…
HACC Cosmological Simulations: First Data Release
Katrin Heitmann, Thomas D. Uram, Hal Finkel +10
We describe the first major public data release from cosmological simulations carried out with Argonne's HACC code. This initial release covers a range of datasets from large gravi…
The Borg Cube Simulation: Cosmological Hydrodynamics with CRK-SPH
J. D. Emberson, Nicholas Frontiere, Salman Habib +4
A challenging requirement posed by next-generation observations is a firm theoretical grasp of the impact of baryons on structure formation. Cosmological hydrodynamic simulations m…
The importance of secondary halos for strong lensing in massive galaxy clusters across redshift
Nan Li, Michael D. Gladders, Katrin Heitmann +6
Cosmological cluster-scale strong gravitational lensing probes the mass distribution of the dense cores of massive dark matter halos and the structures along the line of sight from…
Halo Profiles and the Concentration-Mass Relation for a ΛCDM Universe
Hillary L. Child, Salman Habib, Katrin Heitmann +4
Profiles of dark matter-dominated halos at the group and cluster scales play an important role in modern cosmology. Using results from two very large cosmological -body simulati…
The Mira-Titan Universe II: Matter Power Spectrum Emulation
Earl Lawrence, Katrin Heitmann, Juliana Kwan +7
We introduce a new cosmic emulator for the matter power spectrum covering eight cosmological parameters. Targeted at optical surveys, the emulator provides accurate predictions out…
Simulations of the Pairwise Kinematic Sunyaev-Zel'dovich Signal
Samuel Flender, Lindsey Bleem, Hal Finkel +3
The pairwise kinematic Sunyaev-Zel'dovich (kSZ) signal from galaxy clusters is a probe of their line-of-sight momenta, and thus a potentially valuable source of cosmological inform…
The Mira-Titan Universe: Precision Predictions for Dark Energy Surveys
Katrin Heitmann, Derek Bingham, Earl Lawrence +8
Ground and space-based sky surveys enable powerful cosmological probes based on measurements of galaxy properties and the distribution of galaxies in the Universe. These probes inc…
Redshift-space distortions in massive neutrino and evolving dark energy cosmologies
Amol Upadhye, Juliana Kwan, Adrian Pope +4
Large-scale structure surveys in the coming years will measure the redshift-space power spectrum to unprecedented accuracy, allowing for powerful new tests of the LambdaCDM picture…
The Q Continuum Simulation: Harnessing the Power of GPU Accelerated Supercomputers
Katrin Heitmann, Nicholas Frontiere, Chris Sewell +6
Modeling large-scale sky survey observations is a key driver for the continuing development of high resolution, large-volume, cosmological simulations. We report the first results…
Cosmic Emulation: Fast Predictions for the Galaxy Power Spectrum
Juliana Kwan, Katrin Heitmann, Salman Habib +4
The halo occupation distribution (HOD) approach has proven to be an effective method for modeling galaxy clustering and bias. In this approach, galaxies of a given type are probabi…
Large-Scale Structure Formation with Massive Neutrinos and Dynamical Dark Energy
Amol Upadhye, Rahul Biswas, Adrian Pope +4
Over the next decade, cosmological measurements of the large-scale structure of the Universe will be sensitive to the combined effects of dynamical dark energy and massive neutrino…
Gravitational Waves from Oscillon Preheating
Shuang-Yong Zhou, Edmund J. Copeland, Richard Easther +3
Oscillons are long-lived, localized excitations of nonlinear scalar fields which may be copiously produced during preheating after inflation, leading to a possible oscillon-dominat…
Oscillons After Inflation
Mustafa A. Amin, Richard Easther, Hal Finkel +2
Oscillons are massive, long-lived, localized excitations of a scalar field. We show that in a large class of well-motivated single-field models, inflation is followed by self-reson…
Inflaton Fragmentation and Oscillon Formation in Three Dimensions
Mustafa A. Amin, Richard Easther, Hal Finkel
Analytical arguments suggest that a large class of scalar field potentials permit the existence of oscillons -- pseudo-stable, non-topological solitons -- in three spatial dimensio…
PSpectRe: A Pseudo-Spectral Code for (P)reheating
Richard Easther, Hal Finkel, Nathaniel Roth
PSpectRe is a C++ program that uses Fourier-space pseudo-spectral methods to evolve interacting scalar fields in an expanding universe. PSpectRe is optimized for the analysis of pa…