Explanipedia

47 Tuc in Rubin Data Preview 1. Exploring Early LSST Data and Science Potential Open

Yumi Choi, Knut Olsen, Jeffrey L. Carlin, Yuankun Wang, Fred Moolekamp , et al. · 2025

We present analyses of the early data from Rubin Observatory’s Data Preview 1 (DP1) for the field of the globular cluster 47 Tuc. The DP1 data set for 47 Tuc includes four nights of observations from the Rubin Commissioning Camera (LSSTCom…

DELVE Milky Way Satellite Census I: Satellite Population and Survey Selection Function Open

Chin Yi Tan, A. Drlica-Wagner, A. R. Pace, W. Cerny, Ethan O. Nadler , et al. · 2025

The properties of Milky Way satellite galaxies have important implications for galaxy formation, reionization, and the fundamental physics of dark matter. However, the population of Milky Way satellites includes the faintest known galaxies…

Dark Energy Survey Year 6 Results: improved mitigation of spatially varying observational systematics with masking Open

M. Rodríguez-Monroy, N Weaverdyck, J Elvin-Poole, I Sevilla-Noarbe, A. Carnero Rosell , et al. · 2025

As photometric surveys reach unprecedented statistical precision, systematic uncertainties increasingly dominate large-scale structure probes relying on galaxy number density. Defining the final survey footprint is critical, as it excludes…

Dark Energy Survey Year 6 Results: Redshift Calibration of the MagLim++ Lens Sample Open

G. Giannini, A. Alarcon, William d’Assignies D., G. M. Bernstein, M. A. Troxel , et al. · 2025

In this work, we derive and calibrate the redshift distribution of the MagLim++ lens galaxy sample used in the Dark Energy Survey Year 6 (DES Y6) 3x2pt cosmology analysis. The 3x2pt analysis combines galaxy clustering from the lens galaxy …

Cosmological constraints from the Planck cluster catalogue with DES shear profiles and Chandra observations Open

G. Aymerich, S. Grandis, M. Douspis, G. W. Pratt, L. Salvati , et al. · 2025

We present cosmological constraints from the Planck PSZ2 cosmological cluster sample, using weak-lensing shear profiles from Dark Energy Survey (DES) data and X-ray observations from the Chandra telescope for the mass calibration. We compu…

The Atacama Cosmology Telescope: DR6 Sunyaev-Zel'dovich Selected Galaxy Clusters Catalog Open

M. Aguena, Simone Aiola, S. Allam, F. Andrade-Oliveira, David Bacon , et al. · 2025

We present the results of a search for galaxy clusters in the Atacama Cosmology Telescope (ACT) Data Release 6 (DR6) microwave sky maps covering 16293 square degrees in three frequency bands, using data obtained over the lifetime of the pr…

Selection function of clusters in Dark Energy Survey year 3 data from cross-matching with South Pole Telescope detections Open

S. Grandis, M. Costanzi, J. J. Mohr, L. E. Bleem, Hao‐Yi Wu , et al. · 2025

Context. Galaxy clusters selected based on overdensities of galaxies in photometric surveys provide the largest cluster samples. However, modeling the selection function of such samples is complicated by noncluster members projected along …

Photometry of Outer Solar System Objects from the Dark Energy Survey. II. A Joint Analysis of Trans-Neptunian Absolute Magnitudes, Colors, Light Curves and Dynamics Open

Pedro H. Bernardinelli, G. M. Bernstein, T. M. C. Abbott, M. Aguena, S. Allam , et al. · 2025

For the 696 trans-Neptunian objects (TNOs) with absolute magnitudes 5.5 < H r < 8.2 detected in the Dark Energy Survey, we characterize the relationships between their dynamical state and physical properties—namely H r , indicating size; c…

Interacting dark sector within ETHOS: Cosmological constraints from SPT cluster abundance with DES and HST weak lensing data Open

Asmaa Mazoun, S. Bocquet, J. J. Mohr, Mathias Garny, Henrique Rubira , et al. · 2025

We use galaxy cluster abundance measurements from the South Pole Telescope enhanced by multicomponent matched filter confirmation and complemented with mass information obtained using weak-lensing data from Dark Energy Survey Year 3 (DES Y…

Year six photometric measurements of known Trans-Neptunian Objects and Centaurs by the Dark Energy Survey Open

F S Ferreira, J. I. B. Camargo, R. C. Boufleur, M. V. Banda-Huarca, A. Pieres , et al. · 2025

We identified known Trans-Neptunian Objects (TNOs) and Centaurs in the complete Dark Energy Survey (DES) year six catalogue (DES Y6) through the Sky Body Tracker (SkyBoT) tool. We classified our data set of 144 objects into a widely used 4…

Galaxy cluster matter profiles Open

Amitesh Singh, J. J. Mohr, C. T. Davies, S. Bocquet, S. Grandis , et al. · 2025

We present a study of the weak lensing inferred matter profiles ΔΣ( R ) of 698 South Pole Telescope (SPT) thermal Sunyaev-Zel’dovich effect (tSZE) selected and MCMF optically confirmed galaxy clusters in the redshift range 0.25 < z < 0.94 …

Selection Function of Clusters in Dark Energy Survey Year 3 Data from Cross-Matching with South Pole Telescope Detections Open

S. Grandis, M. Costanzi, J. J. Mohr, L. E. Bleem, Heyu Wu , et al. · 2025

Galaxy clusters selected based on overdensities of galaxies in photometric surveys provide the largest cluster samples. Yet modeling the selection function of such samples is complicated by non-cluster members projected along the line of s…

It is not σ8: constraining the non-linear matter power spectrum with the Dark Energy Survey Year-5 supernova sample Open

P Shah, T. M. Davis, M. Vincenzi, P. Armstrong, Dillon Brout , et al. · 2025

The weak gravitational lensing magnification of Type Ia supernovae (SNe Ia) is sensitive to the matter power spectrum on scales $k\gt 1 h$ Mpc$^{-1}$, making it unwise to interpret SNe Ia lensing in terms of power on linear scales. We comp…

Calibrating the absolute magnitude of type Ia supernovae in nearby galaxies using [O <span>ii</span>] and implications for <i>H</i>0 Open

M. E. Dixon, J. R. Mould, C. Lidman, Edward N. Taylor, Chris Flynn , et al. · 2025

The present state of cosmology is facing a crisis where there is a fundamental disagreement in measurements of the Hubble constant ($H_{0}$), with significant tension between the early and late Universe methods. Type Ia supernovae (SNe Ia)…

It's not $σ_8$ : constraining the non-linear matter power spectrum with the Dark Energy Survey Year-5 supernova sample Open

P Shah, T. M. Davis, M. Vincenzi, P. Armstrong, Dillon Brout , et al. · 2025

The weak gravitational lensing magnification of Type Ia supernovae (SNe Ia) is sensitive to the matter power spectrum on scales $k>1 h$ Mpc$^{-1}$, making it unwise to interpret SNe Ia lensing in terms of power on linear scales. We compute…

Discovering Strong Gravitational Lenses in the Dark Energy Survey with Interactive Machine Learning and Crowd-sourced Inspection with Space Warps Open

José M. González, Philip Holloway, Thomas E. Collett, A. Verma, K. Bechtol , et al. · 2025

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 …

A Pride of Satellites in the Constellation Leo? Discovery of the Leo VI Milky Way Satellite Ultra-faint Dwarf Galaxy with DELVE Early Data Release 3 Open

Chin Yi Tan, W. Cerny, A. Drlica-Wagner, Andrew B. Pace, Marla Geha , et al. · 2025

We report the discovery and spectroscopic confirmation of an ultra-faint Milky Way satellite in the constellation of Leo. This system was discovered as a spatial overdensity of resolved stars observed with Dark Energy Camera (DECam) data f…

Dark Energy Survey Year 6 Results: Photometric Data Set for Cosmology Open

K. Bechtol, I. Sevilla-Noarbe, A. Drlica-Wagner, B. Yanny, R. A. Gruendl , et al. · 2025

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…

Stellar Metallicities from DECam u-band Photometry: A Study of Milky Way Ultra-faint Dwarf Galaxies Open

Yue Pan, Anirudh Chiti, A. Drlica-Wagner, Alexander P. Ji, Ting S. Li , et al. · 2024

We conducted an in-depth analysis of candidate member stars located in the peripheries of three ultra-faint dwarf (UFD) galaxy satellites of the Milky Way (MW): Boötes I (Boo1), Boötes II (Boo2), and Segue I (Seg1). Studying these peripher…

Improving Galaxy Cluster Selection with the Outskirt Stellar Mass of Galaxies Open

Matthew Kwiecien, T. Jeltema, Alexie Leauthaud, Song Huang, E. S. Rykoff , et al. · 2024

The number density and redshift evolution of optically selected galaxy clusters offer an independent measurement of the amplitude of matter fluctuations, $S_8$. However, recent results have shown that clusters chosen by the redMaPPer algor…

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…

The Dark Energy Survey Supernova Program: Light Curves and 5 Yr Data Release Open

B. Sánchez, Dillon Brout, M. Vincenzi, M. Šako, K. Herner , et al. · 2024

We present griz photometric light curves for the full 5 yr of the Dark Energy Survey Supernova (DES-SN) program, obtained with both forced point-spread function photometry on difference images ( DiffImg ) performed during survey operations…

Early photometric and spectroscopic observations of the extraordinarily bright INTEGRAL-detected GRB 221009A Open

R. Sánchez-Ramírez, Rodrigo Guedes Lang, A. Pozanenko, H. Martínez-Huerta, Y. D. Hu , et al. · 2024

Context. GRB 221009A, initially detected as an X-ray transient by Swift , was later revealed to have triggered the Fermi satellite about an hour earlier, marking it as a post-peak observation of the event’s emission. This GRB distinguished…

Comparisons between Resolved Star Formation Rate and Gas Tracers in the Strongly Lensed Galaxy SDSS J0901+1814 at Cosmic Noon Open

Qingxiang Chen, Chelsea E. Sharon, Hiddo Algera, A. J. Baker, Charles R. Keeton , et al. · 2024

We report new radio observations of SDSS J090122.37+181432.3, a strongly lensed star-forming galaxy at z = 2.26. We image 1.4 GHz ( L -band) and 3 GHz ( S -band) continuum using the Very Large Array (VLA) and 1.2 mm (band 6) continuum with…

Calibrating the Absolute Magnitude of Type Ia Supernovae in Nearby Galaxies using [OII] and Implications for $H_{0}$ Open

M. E. Dixon, J. R. Mould, C. Lidman, Edward N. Taylor, Chris Flynn , et al. · 2024

The present state of cosmology is facing a crisis where there is a fundamental disagreement in measurements of the Hubble constant ($H_{0}$), with significant tension between the early and late universe methods. Type Ia supernovae (SNe Ia)…

Comparisons Between Resolved Star Formation Rate and Gas Tracers in the Strongly Lensed Galaxy SDSS J0901+1814 at Cosmic Noon Open

Qingxiang Chen, Chelsea E. Sharon, Hiddo Algera, A. J. Baker, Charles R. Keeton , et al. · 2024

We report new radio observations of SDSS J090122.37+181432.3, a strongly lensed star-forming galaxy at $z=2.26$. We image 1.4 GHz (L-band) and 3 GHz (S-band) continuum using the VLA and 1.2 mm (band 6) continuum with ALMA, in addition to t…

Virtual Synchronous Machine Grid-Forming Inverter Model Specification (REGFM_B1) Open

Wei Du, Sebastian Achilles, Deepak Ramasubramanian, Philip J. Hart, Shruti Rao , et al. · 2024

This report describes a generic virtual synchronous machine (VSM) grid-forming inverter (GFM) model - REGFM_B1. The initial model specification was proposed by Pacific Northwest National Laboratory (PNNL), General Electric (GE), and Electr…

The Absolute Color Calibration of the Dark Energy Survey: A Spectrophotometric Sample of DA White Dwarfs in the Southern Sky Open

D. L. Tucker, S. Allam, J. A. Smith, Pier-Emmanuel Tremblay, Sean Peete , et al. · 2024

The Dark Energy Survey (DES), which is nearing the completion of the analysis of its full data set, is an imaging survey of one-quarter of the Southern sky down to an apparent magnitude of $i\\sim24.5$. The survey observations were conduct…

A Tutorial Set to Prepare for Science with the Vera C. Rubin Observatory Open

D. L. Tucker · 2024

In this poster the Rubin Observatory's Community Science team (CST) presents its current suite of tutorials, which are designed to help people make use of simulated data sets in preparation for the upcoming Legacy Survey of Space and Time …

The Dark Energy Survey Supernova Program: Light curves and 5-Year data release Open

B. Sánchez, D. Brout, M. Vincenzi, M. Šako, K. Herner , et al. · 2024

We present $griz$ photometric light curves for the full 5 years of the Dark Energy Survey Supernova program (DES-SN), obtained with both forced Point Spread Function (PSF) photometry on Difference Images (DIFFIMG) performed during survey o…

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