Andrew Benson
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View article: Cosmology with Voids from the Nancy Grace Roman Space Telescope
Cosmology with Voids from the Nancy Grace Roman Space Telescope Open
We provide an accurate forecast of the expected constraining power from the main void statistics—the void size function and the void-galaxy cross-correlation function—to be measured by the Roman reference High Latitude Spectroscopic Survey…
View article: DiffstarPop: A generative physical model of galaxy star formation history
DiffstarPop: A generative physical model of galaxy star formation history Open
We present DiffstarPop, a differentiable forward model of cosmological populations of galaxy star formation histories (SFH). In the model, individual galaxy SFH is parametrized by Diffstar, which has parameters $θ_{\rm SFH}$ that have a di…
View article: A Comparison of Galacticus and COZMIC WDM Subhalo Populations
A Comparison of Galacticus and COZMIC WDM Subhalo Populations Open
We present a comparative analysis of warm dark matter (WDM) subhalo populations generated by the semi-analytic model {\sc Galacticus} and the COZMIC suite of dark matter-only $N$-body simulations. Using a range of thermal relic WDM particl…
View article: The Effects of Linear Matter Power Spectrum Enhancement on Dark Matter Substructure
The Effects of Linear Matter Power Spectrum Enhancement on Dark Matter Substructure Open
We present cosmological dark matter (DM)–only zoom-in simulations of a Milky Way analog originating from enhanced linear matter power spectra P ( k ) relative to the standard cold, collisionless DM (CDM) cosmology. We consider a Gaussian p…
View article: Clustering analysis of BOSS-CMASS galaxies with semi-analytical model for galaxy formation and halo occupation distribution
Clustering analysis of BOSS-CMASS galaxies with semi-analytical model for galaxy formation and halo occupation distribution Open
The spatial distribution of massive and luminous galaxies has provided important constraints on the fundamental cosmological parameters and physical processes governing galaxy formation. In this work, we construct and compare independent g…
View article: Novel challenges in tracking self-interacting dark matter subhalos
Novel challenges in tracking self-interacting dark matter subhalos Open
Cosmological N-body simulations are among the primary tools for studying structure formation in the Universe. Analyses of these simulations critically depend on accurately identifying and tracking dark matter subhalos over time. In recent …
View article: Data Release: The Effects of Linear Matter Power Spectrum Enhancement on Dark Matter Substructure
Data Release: The Effects of Linear Matter Power Spectrum Enhancement on Dark Matter Substructure Open
Enhanced P(k) Simulation Data -- Files are labeled by the host halo number and presence/absence of a bump ("bump") or cutoff ("cutoff") in the linear matter power spectrum, e.g. Halo004_Tkd_T_vd100_*.tar-- halos.tar files include the z = 0…
View article: One Number to Rule Them All: The Wildlife Sperm Index for Standardized Gamete Assessment
One Number to Rule Them All: The Wildlife Sperm Index for Standardized Gamete Assessment Open
In wildlife conservation, breeding programs focused on reintroduction are critical to recovering endangered species. Assisted reproductive technologies (ARTs) and biobanking play pivotal roles in these efforts but depend on high-quality ga…
View article: A semi-analytic model for effects of fuzzy dark matter granule perturbations on orbital motion
A semi-analytic model for effects of fuzzy dark matter granule perturbations on orbital motion Open
In fuzzy dark matter scenarios, the quantum wave nature of ultralight axion-like particles generates stochastic density fluctuations inside dark matter haloes. These fluctuations, known as granules, perturb the orbits of subhaloes and othe…
View article: Constraints on the properties of νMSM dark matter using the satellite galaxies of the Milky Way
Constraints on the properties of νMSM dark matter using the satellite galaxies of the Milky Way Open
Low-mass galaxies provide a powerful tool with which to investigate departures from the standard cosmological paradigm in models that suppress the abundance of small dark matter (DM) structures. One of the simplest metrics to compare diffe…
View article: Connection between galaxy morphology and dark-matter halo structure I: a running threshold for thin discs and size predictors from the dark sector
Connection between galaxy morphology and dark-matter halo structure I: a running threshold for thin discs and size predictors from the dark sector Open
We study the connection between galaxy morphology and host dark matter (DM) halo structure using cosmological simulations. Introducing a new kinematic decomposition scheme, we robustly separate thin and thick discs and measure halo propert…
View article: Novel Challenges in Tracking Self-Interacting Dark Matter Subhalos
Novel Challenges in Tracking Self-Interacting Dark Matter Subhalos Open
Cosmological N-body simulations are among the primary tools for studying structure formation in the Universe. Analyses of these simulations critically depend on accurately identifying and tracking dark matter subhalos over time. In recent …
View article: A Semi-Analytic model for Effects of Fuzzy Dark Matter Granule Perturbations on Orbital Motion
A Semi-Analytic model for Effects of Fuzzy Dark Matter Granule Perturbations on Orbital Motion Open
In fuzzy dark matter scenarios, the quantum wave nature of ultralight axion-like particles generates stochastic density fluctuations inside dark matter halos. These fluctuations, known as granules, perturb the orbits of subhalos and other …
View article: Bayesian Posteriors with Stellar Population Synthesis on GPUs
Bayesian Posteriors with Stellar Population Synthesis on GPUs Open
Models of Stellar Population Synthesis (SPS) provide a predictive framework for the spectral energy distribution (SED) of a galaxy. SPS predictions can be computationally intensive, creating a bottleneck for attempts to infer the physical …
View article: A New Framework for Interstellar Medium Emission Line Models: Connecting Multiscale Simulations across Cosmological Volumes
A New Framework for Interstellar Medium Emission Line Models: Connecting Multiscale Simulations across Cosmological Volumes Open
The James Webb Space Telescope (JWST) and Atacama Large Millimeter/submillimeter Array have detected emission lines from the ionized interstellar medium (ISM) in some of the first galaxies at z ≳ 6. These measurements present an opportunit…
View article: COZMIC. I. Cosmological Zoom-in Simulations with Initial Conditions Beyond Cold Dark Matter
COZMIC. I. Cosmological Zoom-in Simulations with Initial Conditions Beyond Cold Dark Matter Open
We present 72 cosmological dark-matter--only N -body zoom-in simulations with initial conditions beyond cold, collisionless dark matter (CDM), as the first installment of the COZMIC suite. We simulate Milky Way (MW) analogs with linear mat…
View article: COZMIC. III. Cosmological Zoom-in Simulations of Self-interacting Dark Matter with Suppressed Initial Conditions
COZMIC. III. Cosmological Zoom-in Simulations of Self-interacting Dark Matter with Suppressed Initial Conditions Open
We present eight cosmological dark matter (DM)-only zoom-in simulations of a Milky Way–like system that include suppression of the linear matter power spectrum P ( k ), and/or velocity-dependent DM self-interactions, as the third installme…
View article: COZMIC. II. Cosmological Zoom-in Simulations with Fractional non-CDM Initial Conditions
COZMIC. II. Cosmological Zoom-in Simulations with Fractional non-CDM Initial Conditions Open
We present 24 cosmological dark matter (DM)-only zoom-in simulations of a Milky Way analog with initial conditions appropriate for scenarios where non-cold dark matter (NCDM) is a fraction of the total DM abundance (f-NCDM models) as the s…
View article: COZMIC. I. Cosmological Zoom-in Simulations with Initial Conditions Beyond Cold Dark Matter
COZMIC. I. Cosmological Zoom-in Simulations with Initial Conditions Beyond Cold Dark Matter Open
We present 72 cosmological dark-matter--only N -body zoom-in simulations with initial conditions beyond cold, collisionless dark matter (CDM), as the first installment of the COZMIC suite. We simulate Milky Way (MW) analogs with linear mat…
View article: COZMIC. III. Cosmological Zoom-in Simulations of Self-interacting Dark Matter with Suppressed Initial Conditions
COZMIC. III. Cosmological Zoom-in Simulations of Self-interacting Dark Matter with Suppressed Initial Conditions Open
We present eight cosmological dark matter (DM)-only zoom-in simulations of a Milky Way–like system that include suppression of the linear matter power spectrum P ( k ), and/or velocity-dependent DM self-interactions, as the third installme…
View article: Empirical model for the tidal evolution of dark matter substructure around strong gravitational lenses
Empirical model for the tidal evolution of dark matter substructure around strong gravitational lenses Open
Strong gravitational lenses enable direct inference of halo abundance and internal structure, which in turn enable constraints on the nature of dark matter and the primordial matter power spectrum. However, the density profiles of dark sub…
View article: Clustering analysis of BOSS-CMASS galaxies with semi-analytical model for galaxy formation and halo occupation distribution
Clustering analysis of BOSS-CMASS galaxies with semi-analytical model for galaxy formation and halo occupation distribution Open
The spatial distribution of massive and luminous galaxies have provided important constraints on the fundamental cosmological parameters and physical processes governing galaxy formation. In this work, we construct and compare independent …
View article: Semianalytic model for decaying dark matter halos
Semianalytic model for decaying dark matter halos Open
Decaying dark matter (DDM) affects the evolution of cosmic structure relative to standard cold, collisionless, stable dark matter (CDM). We introduce a new semianalytic model for the effects of two-body DDM on halo structure and subhalo po…
View article: Generating Dark Matter Subhalo Populations Using Normalizing Flows
Generating Dark Matter Subhalo Populations Using Normalizing Flows Open
Strong gravitational lensing is a powerful tool for probing the nature of dark matter, as lensing signals are sensitive to the dark matter substructure within the lensing galaxy. We present a comparative analysis of strong gravitational le…
View article: Evolution and properties of self-interacting dark matter subhalos until core collapse
Evolution and properties of self-interacting dark matter subhalos until core collapse Open
One of the hottest questions in the cosmology of self-interacting dark matter (SIDM) is whether scatterings can induce detectable core-collapse in halos by the present day. Because gravitational tides can accelerate core-collapse, the most…
View article: Dark Galactic Subhalos and the Gaia Snail
Dark Galactic Subhalos and the Gaia Snail Open
Gaia has revealed a clear signal of disequilibrium in the solar neighborhood in the form of a spiral (or snail) feature in the vertical phase-space distribution. We investigate the possibility that this structure emerges from ongoing pertu…
View article: Dark Matter Substructure: A Lensing Perspective
Dark Matter Substructure: A Lensing Perspective Open
The study of dark matter substructure through strong gravitational lensing has shown enormous promise in probing the properties of dark matter on sub-galactic scales. This approach has already been used to place strong constraints on a wid…
View article: Semianalytic model for decaying dark matter halos
Semianalytic model for decaying dark matter halos Open
Decaying dark matter (DDM) affects the evolution of cosmic structure relative to standard cold, collisionless, stable dark matter (CDM). We introduce a new semianalytic model for the effects of two-body DDM on halo structure and subhalo po…
View article: The supermassive black hole population from seeding via collisions in nuclear star clusters
The supermassive black hole population from seeding via collisions in nuclear star clusters Open
The coexistence of nuclear star clusters (NSCs) and supermassive black holes (SMBHs) in galaxies with stellar masses of ∼10 10 M ⊙ , scaling relations between their properties and the properties of the host galaxy (e.g., M NSC stellar − M …
View article: Diversity and universality: evolution of dwarf galaxies with self-interacting dark matter
Diversity and universality: evolution of dwarf galaxies with self-interacting dark matter Open
Dark matter halos with self-interacting dark matter (SIDM) experience a unique evolutionary phenomenon, in that their central regions eventually collapse to high density through the runaway gravothermal process after initially forming a la…