A census of Dark Energy Survey Year 3 redMaPPer galaxy clusters in a high exposure eROSITA All Sky Survey region

Abstract We present the cross-match of galaxy clusters detected by redMaPPer using the first three years of Dark Energy Survey (DESY3RM) operations, and the first release of the eROSITA-All Sky Survey (eRASS1) taken by eROSITA on board the Spectrum Roentgen Gamma telescope. We define a sky region (60○ < R.A. < 90○ and −58○ < Dec < −48○) whereby the mean eRASS1 exposure time of clusters falling within this footprint is ~2.5 times longer than the mean exposure time of the full eRASS1–DESY3RM overlap. Limiting to a redshift range 0.2 < z < 0.65 and redMaPPer estimated richnesses to >50, we obtain a sample of 57 clusters. We match these clusters to the cluster catalogue constructed for the eRASS1, finding 45 clusters with a match and 12 with no match in the catalogue. X-ray properties of the 12 unmatched clusters are estimated via a forced photometry analysis. We investigate the form of the luminosity-richness relation, finding the relation using the full 57 cluster sample is statistically consistent with using only the 45 matched clusters, and will require the deeper data of future eRASS releases (or dedicated X-ray follow-up) to explore further potential differences. Using external data from XMM, ACT and SPT, we find detections of 5 of the 12 unmatched clusters, indicating the presence of virialised gas. Finally, we found the 12 unmatched clusters occupy a higher redshift range and lower richness range (compared to the matched clusters), and find no evidence for an underlying physical reason for the lack of X-ray emission.

Authors

Institutions

Publication Details

Journal
Monthly Notices of the Royal Astronomical Society
Published
2026-09-15
DOI
https://doi.org/10.1093/mnras/stag1747
Primary Topic
Galaxies: Formation, Evolution, Phenomena
Type
article
Field-Weighted Citation Impact
0.00
Controls
|||
ALL TIME
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
article

A census of Dark Energy Survey Year 3 redMaPPer galaxy clusters in a high exposure eROSITA All Sky Survey region

T. Jeltema, S. Grandis, Matthias Kluge, Paul Giles et al.
Monthly Notices of the Royal Astronomical Society
Galaxies: Formation, Evolution, Phenomena
article

A census of Dark Energy Survey Year 3 redMaPPer galaxy clusters in a high exposure eROSITA All Sky Survey region

T. Jeltema, S. Grandis, Matthias Kluge, Paul Giles, Matt Hilton, D J Turner, O Alves, D Bacon, V Vikram, R Wilkinson, M Gatti, A Abdulghafour, J Mena-Fernández, J L Marshall, S Samuroff, E Aljamal, C Doux, M E da Silva Pereira, R L C Ogando, M E Ramos-Ceja, A Farahi, R Miquel, J Weller, M Aguena, S Bhargava, S Lee, D Gruen, D Sanchez Cid, J Garc, S S Allam, E Sanchez, J Carretero, N Weaverdyck, A E Evrard, J Pilling, K Kuehn, S R Hinton, E Suchyta, E W Upsdell, K Honscheid, P T P Viana, J De Vicente, C To, F Balzer, E Bulbul, B Flaugher, F Andrade-Oliveira, D L Tucker, F Menanteau, M Costanzi, A R Walker, L N da Costa, A K Romer, M E C Swanson, O Lahav, G Gutierrez, M Smith, R Camilleri, M Soares-Santos, D L Hollowood, D Brooks, A Carnero Rosell, R C Nichol, P Doel, S Desai, J Frieman, A A Plazas Malagón
article en

Abstract

Abstract We present the cross-match of galaxy clusters detected by redMaPPer using the first three years of Dark Energy Survey (DESY3RM) operations, and the first release of the eROSITA-All Sky Survey (eRASS1) taken by eROSITA on board the Spectrum Roentgen Gamma telescope. We define a sky region (60○ < R.A. < 90○ and −58○ < Dec < −48○) whereby the mean eRASS1 exposure time of clusters falling within this footprint is ~2.5 times longer than the mean exposure time of the full eRASS1–DESY3RM overlap. Limiting to a redshift range 0.2 < z < 0.65 and redMaPPer estimated richnesses to >50, we obtain a sample of 57 clusters. We match these clusters to the cluster catalogue constructed for the eRASS1, finding 45 clusters with a match and 12 with no match in the catalogue. X-ray properties of the 12 unmatched clusters are estimated via a forced photometry analysis. We investigate the form of the luminosity-richness relation, finding the relation using the full 57 cluster sample is statistically consistent with using only the 45 matched clusters, and will require the deeper data of future eRASS releases (or dedicated X-ray follow-up) to explore further potential differences. Using external data from XMM, ACT and SPT, we find detections of 5 of the 12 unmatched clusters, indicating the presence of virialised gas. Finally, we found the 12 unmatched clusters occupy a higher redshift range and lower richness range (compared to the matched clusters), and find no evidence for an underlying physical reason for the lack of X-ray emission.

Monthly Notices of the Royal Astronomical Society
Institució Catalana de Recerca i Estudis Avançats (ES), Oak Ridge National Laboratory (US), Northeastern University (US), Centre National de la Recherche Scientifique (FR), Fermi National Accelerator Laboratory (US), Institute of Space Sciences (ES), Jet Propulsion Laboratory (US), Lawrence Berkeley National Laboratory (US), University of Illinois Urbana-Champaign (US), Universidad de La Laguna (ES), Universität Hamburg (DE), University of Sussex (GB), The University of Queensland (AU), Universidade do Porto (PT), University of California, Santa Cruz (US), Institute for High Energy Physics (ES), Universität Innsbruck (AT), University of Zurich (CH), Aix-Marseille Université (FR), University of Michigan (US), Lowell Observatory (US), Trieste Astronomical Observatory (IT), Mitchell Institute (US), SLAC National Accelerator Laboratory (US), Australian Astronomical Observatory (AU), University of Surrey (GB), LMU Klinikum (DE), University of Chicago (US), Valongo Observatory (BR), Institute of Astrophysics and Space Sciences (PT), Max Planck Institute for Extraterrestrial Physics (DE), Kavli Institute for Particle Astrophysics and Cosmology (US), National Observatory (BR), Observatoire de la Côte d’Azur (FR), Instituto de Astrofísica de Canarias (ES), Astrophysics Science Division (US), Institut National de Physique Nucléaire et de Physique des Particules (FR), National Center for Supercomputing Applications (US), Cerro Tololo Inter-American Observatory (CL), NSF NOIRLab (US), Centrale Méditerranée (FR), Laboratório Interinstitucional de e-Astronomia (BR), Institute for Fundamental Physics of the Universe (IT), Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (ES), Institute of Science and Technology, Australian Astronomical Optics (AU), University College London (GB), The Ohio State University (US), University of Portsmouth (GB), Universidad Autónoma de Madrid (ES), Indian Institute of Technology Hyderabad (IN), Lancaster University (GB), University of Maryland, Baltimore County (US), University of Pennsylvania (US), Ludwig-Maximilians-Universität München (DE), The University of Texas at Austin (US), Université Grenoble Alpes (FR), Texas A&M University (US), University of KwaZulu-Natal (ZA), University of California, Berkeley (US), Stanford University (US), Macquarie University (AU)
Openalex Percentile: Top 10%
Galaxies: Formation, Evolution, Phenomena
DOIOpen Access PDFOpenAlex
AI Navigator

Ask Laika to Summarize, Analyze, and Connect papers live on the map.

Summarize Papers & Methodologies

Extract key findings, datasets, and comparative methods across publications.

Benchmark Rankings & Visual Analytics

Rank top research institutions, authors, funders, topics, and journals by Field-Weighted Citation Impact (FWCI) and paper volume with instant charts.

Connect Distant Disciplines

Bridge topological clusters on the map to find hidden collaborative intersections.