Explanipedia

Dark Energy Survey Year 3 results: Simulation-based $w$CDM inference from weak lensing and galaxy clustering maps with deep learning. I. Analysis design Open

Anders Egede Daugaard, Jozef Bucko, T. Kacprzak, Virginia Ajani, Janis Fluri , et al. · 2025

Data-driven approaches using deep learning are emerging as powerful techniques to extract non-Gaussian information from cosmological large-scale structure. This work presents the first simulation-based inference (SBI) pipeline that combine…

The DECADE cosmic shear project III: validation of analysis pipeline using spatially inhomogeneous data Open

Dhayaa Anbajagane, C. Chang, Nathalie Chicoine, L. F. Secco, Chin Yi Tan , et al. · 2025

We present the pipeline for the cosmic shear analysis of the Dark Energy Camera All Data Everywhere (DECADE) weak lensing dataset: a catalog consisting of 107 million galaxies observed by the Dark Energy Camera (DECam) in the northern Gala…

Constraining the Stellar-to-Halo Mass Relation with Galaxy Clustering and Weak Lensing from DES Year 3 Data Open

Georgios Zacharegkas, C. L. Chang, J. Prat, W.G Hartley, Sunil Mucesh , et al. · 2025

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…

High-significance detection of correlation between the unresolved gamma-ray background and the large-scale cosmic structure Open

Bhashin Thakore, Michela Negro, Marco Regis, S. Camera, D. Gruen , et al. · 2025

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…

The DECADE cosmic shear project III: validation of analysis pipeline using spatially inhomogeneous data Open

Dhayaa Anbajagane, C. Chang, Nathalie Chicoine, L. F. Secco, Chin Yi Tan , et al. · 2025

We present the pipeline for the cosmic shear analysis of the Dark Energy Camera All Data Everywhere (DECADE) weak lensing dataset: a catalog consisting of 107 million galaxies observed by the Dark Energy Camera (DECam) in the northern Gala…

Multiprobe Cosmology from the Abundance of SPT Clusters and DES Galaxy Clustering and Weak Lensing Open

S. Bocquet, S. Grandis, E. Krause, C. To, L. E. Bleem , et al. · 2024

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…

The Dark Energy Survey Supernova Program: Cosmological Analysis and Systematic Uncertainties Open

M. Vincenzi, Dillon Brout, P. Armstrong, B. Popovic, G. Taylor , et al. · 2024

We present the full Hubble diagram of photometrically classified Type Ia supernovae (SNe Ia) from the Dark Energy Survey supernova program (DES-SN). DES-SN discovered more than 20,000 SN candidates and obtained spectroscopic redshifts of 7…

Enhancing weak lensing redshift distribution characterization by optimizing the Dark Energy Survey Self-Organizing Map Photo-z method Open

A. Campos, B. Yin, Scott Dodelson, A. Amon, A. Alarcon , et al. · 2024

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…

Dark Energy Survey Year 6 results: Intra-cluster light from redshift 0.2 to 0.5 Open

Y. Zhang, Jesse B. Golden-Marx, R. L. C. Ogando, B. Yanny, E. S. Rykoff , et al. · 2024

Using the full 6 years of imaging data from the Dark Energy Survey, we study the surface brightness profiles of galaxy cluster central galaxies and intra-cluster light. We apply a ‘stacking’ method to over 4000 galaxy clusters identified b…

The SRG/eROSITA All-Sky Survey Open

S. Grandis, V. Ghirardini, S. Bocquet, C. Garrel, J. J. Mohr , et al. · 2024

Context. Number counts of galaxy clusters across redshift are a powerful cosmological probe if a precise and accurate reconstruction of the underlying mass distribution is performed – a challenge called mass calibration. With the advent of…

Dark Energy Survey Year 3 results: Simulation-based cosmological inference with wavelet harmonics, scattering transforms, and moments of weak lensing mass maps. Validation on simulations Open

M. Gatti, N Jeffrey, L Whiteway, J. Williamson, Bhuvnesh Jain , et al. · 2024

Beyond-two-point statistics contain additional information on cosmological as well as astrophysical and observational (systematics) parameters. In this methodology paper we provide an end-to-end simulation-based analysis of a set of Gaussi…

The Dark Energy Survey Supernova Program: Cosmological Analysis and Systematic Uncertainties Open

M. Vincenzi, Dillon Brout, P. Armstrong, B Popovic, Gail Taylor , et al. · 2024

We present the full Hubble diagram of photometrically-classified Type Ia supernovae (SNe Ia) from the Dark Energy Survey supernova program (DES-SN). DES-SN discovered more than 20,000 SN candidates and obtained spectroscopic redshifts of 7…

Designing an Optimal Kilonova Search Using DECam for Gravitational-wave Events Open

C. R. Bom, J. Annis, Alyssa Garcia, A. Palmese, Nora Sherman , et al. · 2024

We address the problem of optimally identifying all kilonovae detected via gravitational-wave emission in the upcoming LIGO/Virgo/KAGRA observing run, O4, which is expected to be sensitive to a factor of ∼7 more binary neutron star (BNS) a…

Dark Energy Survey Year 3 results: simulation-based cosmological inference with wavelet harmonics, scattering transforms, and moments of weak lensing mass maps I: validation on simulations Open

M. Gatti, N Jeffrey, L Whiteway, J. Williamson, Bhuvnesh Jain , et al. · 2023

Beyond-two-point statistics contain additional information on cosmological as well as astrophysical and observational (systematics) parameters. In this methodology paper we provide an end-to-end simulation-based analysis of a set of Gaussi…

SPT Clusters with DES and HST Weak Lensing. I. Cluster Lensing and Bayesian Population Modeling of Multi-Wavelength Cluster Datasets Open

S. Bocquet, S. Grandis, L. E. Bleem, Matthias Klein, J. J. Mohr , et al. · 2023

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 Surve…

Dark Energy Survey Year 3 results: redshift calibration of the <span>MagLim</span> lens sample from the combination of SOMPZ and clustering and its impact on cosmology Open

G. Giannini, A. Alarcon, M. Gatti, A. Porredon, M. Crocce , et al. · 2023

We present an alternative calibration of the MagLim lens sample redshift distributions from the Dark Energy Survey (DES) first 3 yr of data (Y3). The new calibration is based on a combination of a self-organizing-map-based scheme and clust…

Beyond the 3rd moment: a practical study of using lensing convergence CDFs for cosmology with DES Y3 Open

Dhayaa Anbajagane, C. Chang, Arka Banerjee, Tom Abel, M. Gatti , et al. · 2023

Widefield surveys probe clustered scalar fields – such as galaxy counts, lensing potential, etc. – which are sensitive to different cosmological and astrophysical processes. Constraining such processes depends on the statistics that summar…

Detection of the significant impact of source clustering on higher order statistics with DES Year 3 weak gravitational lensing data Open

M. Gatti, N Jeffrey, L Whiteway, Virginia Ajani, Tomasz Kacprzak , et al. · 2023

We measure the impact of source galaxy clustering on higher order summary statistics of weak gravitational lensing data. By comparing simulated data with galaxies that either trace or do not trace the underlying density field, we show that…

Dark Energy Survey Year 6 Results: Intra-Cluster Light from Redshift 0.2 to 0.5 Open

Y. Zhang, Jesse B. Golden-Marx, R. C. Ogando, B. Yanny, E. S. Rykoff , et al. · 2023

Using the full six years of imaging data from the Dark Energy Survey, we study the surface brightness profiles of galaxy cluster central galaxies and intra-cluster light. We apply a ``stacking'' method to over four thousand galaxy clusters…

Identification of Galaxy–Galaxy Strong Lens Candidates in the DECam Local Volume Exploration Survey Using Machine Learning Open

E.A. Zaborowski, A. Drlica-Wagner, Finian Ashmead, John F. Wu, R. Morgan , et al. · 2023

We perform a search for galaxy–galaxy strong lens systems using a convolutional neural network (CNN) applied to imaging data from the first public data release of the DECam Local Volume Exploration Survey, which contains ∼520 million astro…

The Dark Energy Survey Year 3 high-redshift sample: selection, characterization, and analysis of galaxy clustering Open

C. Sánchez, A. Alarcon, G. M. Bernstein, Javier Sánchez, S. Pandey , et al. · 2023

The fiducial cosmological analyses of imaging surveys like DES typically probe the Universe at redshifts z < 1. We present the selection and characterization of high-redshift galaxy samples using DES Year 3 data, and the analysis of the…

The PSZ-MCMF catalogue of <i>Planck</i> clusters over the DES region Open

D. Hernández-Lang, Matthias Klein, J. J. Mohr, S. Grandis, J.‐B. Melin , et al. · 2023

We present the first systematic follow-up of Planck Sunyaev–Zeldovich effect (SZE) selected candidates down to signal-to-noise (S/N) of 3 over the 5000 deg2 covered by the Dark Energy Survey. Using the MCMF cluster confirmation algorithm, …

DELVE 6: An Ancient, Ultra-faint Star Cluster on the Outskirts of the Magellanic Clouds Open

W. Cerny, A. Drlica-Wagner, Ting S. Li, Andrew B. Pace, Knut Olsen , et al. · 2023

We present the discovery of DELVE 6, an ultra-faint stellar system identified in the second data release of the DECam Local Volume Exploration (DELVE) survey. Based on a maximum-likelihood fit to its structure and stellar population, we fi…

Detection of the significant impact of source clustering on higher-order statistics with DES Year 3 weak gravitational lensing data Open

M. Gatti, N Jeffrey, L Whiteway, Virginia Ajani, Tomasz Kacprzak , et al. · 2023

We demonstrate and measure the impact of source galaxy clustering on higher-order summary statistics of weak gravitational lensing data. By comparing simulated data with galaxies that either trace or do not trace the underlying density fie…

Constraints on the Physical Properties of GW190814 through Simulations Based on DECam Follow-up Observations by the Dark Energy Survey Open

R. Morgan, M. Soares-Santos, J. Annis, K. Herner, Alyssa Garcia , et al. · 2023

On 2019 August 14, the LIGO and Virgo Collaborations detected gravitational waves from a black hole and a 2.6 solar mass compact object, possibly the first neutron star-black hole merger. In search of an optical counterpart, the Dark Energ…

DeepZipper. II. Searching for lensed supernovae in dark energy survey data with deep learning Open

R. Morgan, B. Nord, K. Bechtol, A. Möller, W. G. Hartley , et al. · 2023

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

DELVE 6: An Ancient, Ultra-Faint Star Cluster on the Outskirts of the Magellanic Clouds Open

W. Cerny, A. Drlica-Wagner, Ting S. Li, Andrew B. Pace, Knut Olsen , et al. · 2023

We present the discovery of DELVE 6, an ultra-faint stellar system identified in the second data release of the DECam Local Volume Exploration (DELVE) survey. Based on a maximum-likelihood fit to its structure and stellar population, we fi…

Synchronous Rotation in the (136199) Eris–Dysnomia System Open

G. M. Bernstein, Bryan J. Holler, Rosario Navarro-Escamilla, Pedro H. Bernardinelli, T. M. C. Abbott , et al. · 2023

We combine photometry of Eris from a 6 month campaign on the Palomar 60 inch telescope in 2015, a 1 month Hubble Space Telescope WFC3 campaign in 2018, and Dark Energy Survey data spanning 2013–2018 to determine a light curve of definitive…

Cool Cores in Clusters of Galaxies in the Dark Energy Survey Open

K. Graham, Jackson H. O’Donnell, M. M. Silverstein, O. Eiger, T. Jeltema , et al. · 2023

We search for the presence of cool cores in optically selected galaxy clusters from the Dark Energy Survey (DES) and investigate their prevalence as a function of redshift and cluster richness. Clusters were selected from the redMaPPer ana…

The Dark Energy Survey Supernova Program: Corrections on Photometry Due to Wavelength-dependent Atmospheric Effects Open

J Lee, M. Acevedo, M. Šako, M. Vincenzi, Dillon Brout , et al. · 2023

Wavelength-dependent atmospheric effects impact photometric supernova flux measurements for ground-based observations. We present corrections on supernova flux measurements from the Dark Energy Survey Supernova Program’s 5YR sample (DES-SN…

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