A. Roodman
YOU?
Author Swipe
View article: Dark Energy Survey Year 3 results: <i>w</i> CDM cosmology from simulation-based inference with persistent homology on the sphere
Dark Energy Survey Year 3 results: <i>w</i> CDM cosmology from simulation-based inference with persistent homology on the sphere Open
We present cosmological constraints from Dark Energy Survey Year 3 (DES Y3) weak lensing data using persistent homology, a topological data analysis technique that tracks how features like clusters and voids evolve across density threshold…
View article: First Temperature Profile of a Stellar Flare Using Differential Chromatic Refraction
First Temperature Profile of a Stellar Flare Using Differential Chromatic Refraction Open
We present the first derivation of a stellar flare temperature profile from single-band photometry. Stellar flare DWF 030225.574−545707.45129 was detected in 2015 by the Dark Energy Camera as part of the Deeper, Wider, Faster program. The …
View article: Dark Energy Survey Year 6 results: cell-based coadds and <scp>metadetection</scp> weak lensing shape catalogue
Dark Energy Survey Year 6 results: cell-based coadds and <span>metadetection</span> weak lensing shape catalogue Open
We present the metadetection weak lensing galaxy shape catalogue from the 6-yr Dark Energy Survey (DES Y6) imaging data. This data set is the final release from DES, spanning 4422 deg$^2$ of the southern sky. We describe how the catalogue …
View article: Biasing from galaxy trough and peak profiles with the DES Y3 redMaGiC galaxies and the weak lensing mass map
Biasing from galaxy trough and peak profiles with the DES Y3 redMaGiC galaxies and the weak lensing mass map Open
We measure the correspondence between the distribution of galaxies and matter around troughs and peaks in the projected galaxy density, by comparing \texttt{redMaGiC} galaxies ($0.15
View article: NSF-DOE Vera C. Rubin Observatory Observations of Interstellar Comet 3I/ATLAS (C/2025 N1)
NSF-DOE Vera C. Rubin Observatory Observations of Interstellar Comet 3I/ATLAS (C/2025 N1) Open
We report on the observation and measurement of astrometry, photometry, morphology, and activity of the interstellar object 3I/ATLAS, also designated C/2025 N1 (ATLAS), with the NSF-DOE Vera C. Rubin Observatory. The third interstellar obj…
View article: Constraining the Stellar-to-Halo Mass Relation with Galaxy Clustering and Weak Lensing from DES Year 3 Data
Constraining the Stellar-to-Halo Mass Relation with Galaxy Clustering and Weak Lensing from DES Year 3 Data Open
We develop a framework to study the relation between the stellar mass of a galaxy and the total mass of its host dark matter halo using galaxy clustering and galaxy-galaxy lensing measurements. We model a wide range of scales, roughly from…
View article: Constraints on cosmology and baryonic feedback with joint analysis of Dark Energy Survey Year 3 lensing data and ACT DR6 thermal Sunyaev-Zel'dovich effect observations
Constraints on cosmology and baryonic feedback with joint analysis of Dark Energy Survey Year 3 lensing data and ACT DR6 thermal Sunyaev-Zel'dovich effect observations Open
We present a joint analysis of weak gravitational lensing (shear) data obtained from the first three years of observations by the Dark Energy Survey and thermal Sunyaev-Zel'dovich (tSZ) effect measurements from a combination of Atacama Cos…
View article: High-significance detection of correlation between the unresolved gamma-ray background and the large-scale cosmic structure
High-significance detection of correlation between the unresolved gamma-ray background and the large-scale cosmic structure Open
Our understanding of the γ -ray sky has improved dramatically in the past decade, however, the unresolved γ -ray background (UGRB) still has a potential wealth of information about the faintest γ -ray sources pervading the Universe. Statis…
View article: Superclustering with the Atacama Cosmology Telescope and Dark Energy Survey. II. Anisotropic Large-scale Coherence in Hot Gas, Galaxies, and Dark Matter
Superclustering with the Atacama Cosmology Telescope and Dark Energy Survey. II. Anisotropic Large-scale Coherence in Hot Gas, Galaxies, and Dark Matter Open
Statistics that capture the directional dependence of the baryon distribution in the cosmic web enable unique tests of cosmology and astrophysical feedback. We use constrained oriented stacking of thermal Sunyaev–Zel’dovich (tSZ) maps to m…
View article: Dark Energy Survey Year 3 Results: Cosmological Constraints from Cluster Abundances, Weak Lensing, and Galaxy Clustering
Dark Energy Survey Year 3 Results: Cosmological Constraints from Cluster Abundances, Weak Lensing, and Galaxy Clustering Open
Galaxy clusters provide a unique probe of the late-time cosmic structure and serve as a powerful independent test of the $\Lambda$CDM model. This work presents the first set of cosmological constraints derived with ~16,000 optically select…
View article: Dark Energy Survey Year 3 results: Simulation-based cosmological inference with wavelet harmonics, scattering transforms, and moments of weak lensing mass maps. II. cosmological results
Dark Energy Survey Year 3 results: Simulation-based cosmological inference with wavelet harmonics, scattering transforms, and moments of weak lensing mass maps. II. cosmological results Open
We present a simulation-based cosmological analysis using a combination of Gaussian and non-Gaussian statistics of the weak lensing mass (convergence) maps from the first three years (Y3) of the Dark Energy Survey (DES). We implement: 1) s…
View article: Discovering Strong Gravitational Lenses in the Dark Energy Survey with Interactive Machine Learning and Crowd-sourced Inspection with Space Warps
Discovering Strong Gravitational Lenses in the Dark Energy Survey with Interactive Machine Learning and Crowd-sourced Inspection with Space Warps Open
We conduct a search for strong gravitational lenses in the Dark Energy Survey (DES) Year 6 imaging data. We implement a pre-trained Vision Transformer (ViT) for our machine learning (ML) architecture and adopt Interactive Machine Learning …
View article: The Dark Energy Survey Supernova Program: an updated measurement of the Hubble constant using the inverse distance ladder
The Dark Energy Survey Supernova Program: an updated measurement of the Hubble constant using the inverse distance ladder Open
We measure the current expansion rate of the Universe, Hubble’s constant $H_0$, by calibrating the absolute magnitudes of supernovae to distances measured by baryon acoustic oscillations (BAO). This ‘inverse distance ladder’ technique prov…
View article: Dark Energy Survey Year 6 Results: Photometric Data Set for Cosmology
Dark Energy Survey Year 6 Results: Photometric Data Set for Cosmology Open
We describe the photometric data set assembled from the full six years of observations by the Dark Energy Survey (DES) in support of static-sky cosmology analyses. DES Y6 Gold is a curated data set derived from DES Data Release 2 (DR2) tha…
View article: Multiprobe Cosmology from the Abundance of SPT Clusters and DES Galaxy Clustering and Weak Lensing
Multiprobe Cosmology from the Abundance of SPT Clusters and DES Galaxy Clustering and Weak Lensing Open
Cosmic shear, galaxy clustering, and the abundance of massive halos each probe the large-scale structure of the Universe in complementary ways. We present cosmological constraints from the joint analysis of the three probes, building on th…
View article: Evaluating cosmological biases using photometric redshifts for Type Ia Supernova cosmology with the Dark Energy Survey Supernova Program
Evaluating cosmological biases using photometric redshifts for Type Ia Supernova cosmology with the Dark Energy Survey Supernova Program Open
Cosmological analyses with Type Ia Supernovae (SNe Ia) have traditionally been reliant on spectroscopy for both classifying the type of supernova and obtaining reliable redshifts to measure the distance–redshift relation. While obtaining a…
View article: Dark energy survey year 3 results: likelihood-free, simulation-based <i>w</i>CDM inference with neural compression of weak-lensing map statistics
Dark energy survey year 3 results: likelihood-free, simulation-based <i>w</i>CDM inference with neural compression of weak-lensing map statistics Open
We present simulation-based cosmological wcold dark matter (wCDM) inference using dark energy survey year 3 weak-lensing maps, via neural data compression of weak-lensing map summary statistics: power spectra, peak counts, and direct map-l…
View article: Constraints on compact objects from the Dark Energy Survey 5-yr supernova sample
Constraints on compact objects from the Dark Energy Survey 5-yr supernova sample Open
Gravitational lensing magnification of Type Ia supernovae (SNe Ia) allows information to be obtained about the distribution of matter on small scales. In this paper, we derive limits on the fraction $\alpha$ of the total matter density in …
View article: 'Weather' in the LSST Camera: Investigating Patterns in Differenced Flat Images
'Weather' in the LSST Camera: Investigating Patterns in Differenced Flat Images Open
During electro-optical testing of the camera for the upcoming Vera C. Rubin Observatory Legacy Survey of Space and Time, a unique low-signal pattern was found in differenced pairs of flat images used to create photon transfer curves, with …
View article: SPT clusters with DES and HST weak lensing. I. Cluster lensing and Bayesian population modeling of multiwavelength cluster datasets
SPT clusters with DES and HST weak lensing. I. Cluster lensing and Bayesian population modeling of multiwavelength cluster datasets Open
Here, we present a Bayesian population modeling method to analyze the abundance of galaxy clusters identified by the South Pole Telescope (SPT) with a simultaneous mass calibration using weak gravitational lensing data from the Dark Energy…
View article: The gravitational lensing imprints of DES Y3 superstructures on the CMB: a matched filtering approach
The gravitational lensing imprints of DES Y3 superstructures on the CMB: a matched filtering approach Open
Low-density cosmic voids gravitationally lens the cosmic microwave background (CMB), leaving a negative imprint on the CMB convergence $\kappa$. This effect provides insight into the distribution of matter within voids, and can also be use…
View article: Weak lensing combined with the kinetic Sunyaev–Zel’dovich effect: a study of baryonic feedback
Weak lensing combined with the kinetic Sunyaev–Zel’dovich effect: a study of baryonic feedback Open
Extracting precise cosmology from weak lensing surveys requires modelling the non-linear matter power spectrum, which is suppressed at small scales due to baryonic feedback processes. However, hydrodynamical galaxy formation simulations ma…
View article: Weak lensing combined with the kinetic Sunyaev–Zel’dovich effect: a study of baryonic feedback
Weak lensing combined with the kinetic Sunyaev–Zel’dovich effect: a study of baryonic feedback Open
Extracting precise cosmology from weak lensing surveys requires modelling the non-linear matter power spectrum, which is suppressed at small scales due to baryonic feedback processes. However, hydrodynamical galaxy formation simulations ma…
View article: Dark Energy Survey: Galaxy sample for the baryonic acoustic oscillation measurement from the final dataset
Dark Energy Survey: Galaxy sample for the baryonic acoustic oscillation measurement from the final dataset Open
Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAM
View article: LSST Camera focal plane optimization
LSST Camera focal plane optimization Open
Proceedings of the SPIE SPIE Astronomical Telescopes + Instrumentation conference 16-22 JUNE 2024
View article: The Dark Energy Survey 5-yr photometrically classified type Ia supernovae without host-galaxy redshifts
The Dark Energy Survey 5-yr photometrically classified type Ia supernovae without host-galaxy redshifts Open
Current and future Type Ia Supernova (SN Ia) surveys will need to adopt new approaches to classifying SNe and obtaining their redshifts without spectra if they wish to reach their full potential. We present here a novel approach that uses …
View article: Enhancing weak lensing redshift distribution characterization by optimizing the Dark Energy Survey Self-Organizing Map Photo-z method
Enhancing weak lensing redshift distribution characterization by optimizing the Dark Energy Survey Self-Organizing Map Photo-z method Open
Characterization of the redshift distribution of ensembles of galaxies is pivotal for large scale structure cosmological studies. In this work, we focus on improving the Self-Organizing Map (SOM) methodology for photometric redshift estima…
View article: Weak Gravitational Lensing around Low Surface Brightness Galaxies in the DES Year 3 Data
Weak Gravitational Lensing around Low Surface Brightness Galaxies in the DES Year 3 Data Open
We present galaxy-galaxy lensing measurements using a sample of low surface brightness galaxies (LSBGs) drawn from the Dark Energy Survey Year 3 (Y3) data as lenses. LSBGs are diffuse galaxies with a surface brightness dimmer than the ambi…
View article: LSST camera verification testing and characterization
LSST camera verification testing and characterization Open
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan
View article: Integrating the LSST camera
Integrating the LSST camera Open
SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan