Article

Euclid Quick Data Release (Q1)

S. BhargavaUniversité Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire LagrangeC. BenoistObservatoire de la Côte d’AzurA.H. GonzalezDepartment of Astronomy, University of FloridaM MaturiInstitut für Theoretische Physik, University of HeidelbergJ.-B. MélinCEA Paris-SaclayS.A StanfordE. MunariIFPU, Institute for Fundamental Physics of the UniverseMichael W. VannierUniversité Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire LagrangeClaire E. MurrayUniversité Paris Cité, CNRS, Astroparticule et CosmologieS. MaurogordatoObservatoire de la Côte d’AzurA BivianoINAF-Osservatorio Astronomico di TriesteJ. F. Macías–PérezUniv. Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3J. G. BartlettUniversité Paris CitéF. PacaudUniversität Bonn, Argelander-Institut für AstronomieA. WidmerUniversité Paris CitéM. MeneghettiINFN-Sezione di BolognaB. SartorisINAF-Osservatorio Astronomico di TriesteM. AguenaINAF-Osservatorio Astronomico di TriesteGaël AlgueroUniv. Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3S. AndreonINAF-Osservatorio Astronomico di BreraS BardelliINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaLucie BaumontIFPU, Institute for Fundamental Physics of the UniverseM. BolzonellaINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaR. CabanacInstitut de Recherche en Astrophysique et Planétologie (IRAP), Université di Toulouse, CNRS, UPS, CNESA. CappiINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaG CastignaniINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaC. CombetInstitut National de Physique Nucléaire et de Physique des ParticulesJ. ComparatMax Planck Institute for Extraterrestrial PhysicsS. FarrensUniversité Paris CitéZohreh GhaffariIFPU, Institute for Fundamental Physics of the UniversePaul GilesDepartment of Physics & Astronomy, University of SussexC GiocoliINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaM. GirardiINAF-Osservatorio Astronomico di TriesteN. A. HatchSchool of Physics and Astronomy, University of NottinghamL. IngogliaINAF, Istituto di RadioastronomiaA. IovinoINAF-Osservatorio Astronomico di BreraG. A. MamonInstitut d’Astrophysique de Paris, UMR 7095, CNRS, and Sorbonne UniversitéS. MeiUniversité Paris Cité, CNRS, Astroparticule et CosmologieL. MoscardiniDipartimento di Fisica e Astronomia “Augusto Righi” – Alma Mater Studiorum Università di BolognaS MourreOCAJ. OdierUniversité Grenoble AlpesG.W. PrattUniversité Paris-Saclay, Université Paris Cité, CEA, CNRS, AIMP. TarríoObservatorio Astronómico Nacional, IGNGreta ToniINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaJ. WellerUniversitäts-Sternwarte München, Fakultät für Physik, Ludwig-Maximilians-Universität MünchenE. ZuccaINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaN. AghanimUniversité Paris-Saclay, CNRS, Institut d’astrophysique spatialeB. AltieriESAC/ESAA AmaraSchool of Mathematics and Physics, University of SurreyN. AuricchioINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaC. BaccigalupiINAF-Osservatorio Astronomico di TriesteM BaldiINFN-Sezione di BolognaA. BalestraINAF-Osservatorio Astronomico di PadovaP. BattagliaINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaF. BellagambaDipartimento di Fisica e Astronomia, Università di BolognaA. BonchiSpace Science Data Center, Italian Space AgencyE. BranchiniDipartimento di Fisica, Università di GenovaM. BresciaINAF-Osservatorio Astronomico di CapodimonteJ. BrinchmannInstituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUPS. CameraINFN-Sezione di TorinoV. CapobiancoINAF-Osservatorio Astrofisico di TorinoC. CarboneINAF-IASF MilanoJ. CarreteroPort d’Informació CientíficaS. CasasInstitute for Theoretical Particle Physics and Cosmology (TTK), RWTH Aachen UniversityM. CastellanoNational Institute for AstrophysicsS. CavuotiINFN section of NaplesK. C. ChambersInstitute for Astronomy, University of HawaiiA. CimattiDipartimento di Fisica e Astronomia “Augusto Righi” – Alma Mater Studiorum Università di BolognaC. Colodro-CondeInstituto de Astrofísica de CanariasG. CongedoInstitute for Astronomy, University of EdinburghC.J. ConseliceJodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, University of ManchesterL. ConversiESAC/ESAY. CopinCentre National de la Recherche ScientifiqueF. CourbinInstitut de Ciències del Cosmos (ICCUB), Universitat de Barcelona (IEEC-UB)H. M. CourtoisCentre National de la Recherche ScientifiqueM. CropperMullard Space Science Laboratory, University College LondonA da SilvaDepartamento de Física, Faculdade de Ciências, Universidade de LisboaH. DegaudenziDepartment of Astronomy, University of GenevaG. De LuciaINAF-Osservatorio Astronomico di TriesteA. M. Di GiorgioINAF-Istituto di Astrofisica e Planetologia SpazialiC. DoldingMullard Space Science Laboratory, University College LondonH. DoleUniversité Paris-SaclayF. DubathDepartment of Astronomy, University of GenevaC. A. J. DuncanJodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, University of ManchesterX. DupacESAC/ESAS. DusiniINFN-PadovaA. EaletUniversité Claude Bernard Lyon 1, CNRS/IN2P3, IP2I Lyon, UMR 5822S. EscoffierAix-Marseille Université, CNRS/IN2P3, CPPMM. FarinaINAF-Istituto di Astrofisica e Planetologia SpazialiR. FarinelliINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaF. FaustiniSpace Science Data Center, Italian Space AgencyS. FerriolUniversité Claude Bernard Lyon 1, CNRS/IN2P3, IP2I Lyon, UMR 5822F FinelliINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaP. FosalbaInstitut d’Estudis Espacials de Catalunya (IEEC)S. FotopoulouBristol Robotics LaboratoryM FrailisINAF-Osservatorio Astronomico di TriesteE. FranceschiINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaM FumanaINAF-IASF MilanoS. GaleottaINAF-Osservatorio Astronomico di TriesteK. GeorgeUniversitäts-Sternwarte München, Fakultät für Physik, Ludwig-Maximilians-Universität München

2025en

ABI

Abstract

The first survey data release by the Euclid mission covers approximately 63 deg 2 in the Euclid Deep Fields to the same depth as the Euclid Wide Survey. This paper showcases, for the first time, the performance of cluster finders on Euclid data and presents examples of validated clusters in the Quick Release 1 (Q1) imaging data. We identify clusters using two algorithms ( AMICO and PZWav ) implemented in the Euclid cluster-detection pipeline. We explore the internal consistency of detections from the two codes, and cross-match detections with known clusters from other surveys using external multi-wavelength and spectroscopic data sets. This enables assessment of the Euclid photometric redshift accuracy and also of systematics such as mis-centring between the optical cluster centre and centres based on X-ray and/or Sunyaev–Zeldovich observations. We report 426 joint PZWav and AMICO -detected clusters with high signal-to-noise ratios over the full Q1 area in the redshift range 0.2 ≤ z ≤ 1.5. The chosen redshift and signal-to-noise thresholds are motivated by the photometric quality of the early Euclid data. We provide richness estimates for each of the Euclid -detected clusters and show its correlation with various external cluster mass proxies. Due to the limited area and evolving data quality, the sample is not intended to serve as a reference for cosmological applications, but to verify and validate the cluster workflow. Out of the full sample, 77 systems are potentially new to the literature. Overall, the Q1 cluster catalogue demonstrates a successful validation of the workflow ahead of the Euclid Data Release 1, based on the consistency of internal and external properties of Euclid -detected clusters.

Identifiers

DOI: 10.1051/0004-6361/202554937

Citations and references

Cited by 60 references