Euclid Quick Data Release (Q1)
Mike WalmsleyJodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, University of ManchesterL. QuilleyCentre National de la Recherche ScientifiqueKaren L. MastersDepartments of Physics and Astronomy, Haverford CollegeSandor KrukESAC/ESAK. A. RemmelgasESAC/ESAJürgen PoppSchool of Physical Sciences, The Open UniversityE. RomelliINAF-Osservatorio Astronomico di TriesteDavid O’RyanCentro de Astrobiología (CAB), CSIC-INTA, ESAC CampusH. J. DickinsonSchool of Physical Sciences, The Open UniversityChris LintottDepartment of Physics, Oxford UniversityS. SerjeantSchool of Physical Sciences, The Open UniversityRebecca SmethurstDepartment of Physics, Oxford UniversityBrooke SimmonsDepartment of Physics, Lancaster UniversityJason Shingirai MakechemuDepartment of Physics, Lancaster UniversityI. L. GarlandMasaryk UniversityH. L. RobertsMinnesota Institute for Astrophysics, University of MinnesotaKameswara Bharadwaj ManthaMinnesota Institute for Astrophysics, University of MinnesotaL. FortsonMinnesota Institute for Astrophysics, University of MinnesotaTobias GéronDavid A. Dunlap Department of Astronomy & Astrophysics, University of TorontoWilliam C. KeelUniversity of AlabamaE. M. BaetenCitizen Scientist, Zooniverse c/o University of OxfordC. MacmillanDepartment of Physics, Oxford UniversityJo BovyDavid A. Dunlap Department of Astronomy & Astrophysics, University of TorontoSantiago CasasInstitute for Theoretical Particle Physics and Cosmology (TTK), RWTH Aachen UniversityC. De LeoDipartimento di Fisica, Sapienza Università di RomaH. Domínguez SánchezInstituto de Física de Cantabria, Edificio Juan JordáJ. KatonaELTE Eötvös Loránd University, Institute of Physics and AstronomyJ. H. KnapenUniversidad de La Laguna, Departamento de AstrofísicaAndrás KovácsKonkoly Observatory, HUN-REN CSFK, MTA Centre of ExcellenceN. AghanimUniversité Paris-Saclay, CNRS, Institut d’astrophysique spatialeB. AltieriESAC/ESAA. AmaraSchool of Mathematics and Physics, University of SurreyS. AndreonINAF-Osservatorio Astronomico di BreraN. AuricchioINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaH. AusselUniversité Paris CitéC. BaccigalupiINAF-Osservatorio Astronomico di TriesteMarco BaldiINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaA. BalestraINAF-Osservatorio Astronomico di PadovaS. BardelliINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaA. BassetCentre National d’Etudes Spatiales – Centre spatial de ToulouseP. BattagliaINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaR. BenderMax Planck Institute for Extraterrestrial PhysicsA. BivianoINAF-Osservatorio Astronomico di TriesteA. BonchiUnited Kingdom Space AgencyE. BranchiniDipartimento di Fisica, Università di GenovaM. BresciaDepartment of Physics “E. Pancini”, University Federico IIJ. BrinchmannInstituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUPS. CameraINAF-Osservatorio Astrofisico di TorinoG Cañas-HerreraLeiden Observatory, Leiden UniversityV. CapobiancoINAF-Osservatorio Astrofisico di TorinoC. CarboneINAF-IASF MilanoJ. CarreteroCentro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT)F. J. CastanderInstitut d’Estudis Espacials de Catalunya (IEEC), Edifici RDIT, Campus UPCM. CastellanoNational Institute for AstrophysicsG. CastignaniINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaS. CavuotiNaples Anesthesia & Physician AssociatesK. 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 Edinburgh, Royal ObservatoryChristopher J. ConseliceJodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, University of ManchesterL. ConversiEuropean Space Research InstituteY. CopinCentre National de la Recherche ScientifiqueF. CourbinInstitució Catalana de Recerca i Estudis Avançats (ICREA)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. EscoffierCentre de physique des particules de MarseilleMaximilian FabriciusUniversitäts-Sternwarte München, Fakultät für Physik, Ludwig-Maximilians-Universität MünchenM. FarinaINAF-Istituto di Astrofisica e Planetologia SpazialiR. FarinelliINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaF. FaustiniNational Institute for AstrophysicsF. Finelli⋆INAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaP. FosalbaInstitute of Space Sciences (ICE, CSIC), Campus UABS. FotopoulouBristol Robotics LaboratoryM. FrailisINAF-Osservatorio Astronomico di TriesteE. FranceschiINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaS. GaleottaINAF-Osservatorio Astronomico di TriesteKoshy GeorgeUniversitäts-Sternwarte München, Fakultät für Physik, Ludwig-Maximilians-Universität MünchenB. GillisInstitute for Astronomy, University of Edinburgh, Royal ObservatoryC. GiocoliINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaP. Gómez-AlvarezFRACTAL S.L.N.EJ Gracia-CarpioMax Planck Institute for Extraterrestrial PhysicsB. R. GranettINAF-Osservatorio Astronomico di BreraA. GrazianINAF-Osservatorio Astronomico di PadovaF. GruppUniversitäts-Sternwarte München, Fakultät für Physik, Ludwig-Maximilians-Universität MünchenStephen GwynNRC HerzbergS. V. H. HauganInstitute of Theoretical Astrophysics, University of OsloHenk HoekstraLeiden Observatory, Leiden UniversityW. HolmesJet Propulsion Laboratory, California Institute of Technology
2026en
ABI
Abstract
We present a detailed visual morphology catalogue for the Euclid Quick Release 1 (Q1). Our catalogue includes galaxy features such as bars, spiral arms, and ongoing mergers, for the 378 000 bright ( I E < 20.5) or extended (area ≥700 pixels) galaxies in Q1. The catalogue was created by finetuning the Zoobot galaxy foundation models on annotations from an intensive one-month campaign by Galaxy Zoo volunteers. Our measurements are fully automated, and hence fully scaleable. This catalogue is the first 0.4% of the approximately 100 million galaxies where Euclid will ultimately resolve detailed morphology.