Accès ouvert déclaré
2026
article
Euclid : Discovery of bright z ≃ 7 Lyman-break galaxies in UltraVISTA and Euclid COSMOS
R. G. Varadaraj, R. A. A. Bowler, M. J. Jarvis, J. R. Weaver, Eduardo Bañados, Paul H. Holloway, K. I. Caputi, S. M. Wilkins, Da-Ming Yang, B. Milvang-Jensen, L. Gabarra, P. A. Oesch, A Amara, S. Andreon, N. Auricchio, C. Baccigalupi, M. Baldi, S Bardelli, A. Biviano, E. Branchini, M. Brescia, S. Camera, G Cañas-Herrera, V. Capobianco, Chris Carbone, J. Carretero, M. Castellano, G. Castignani, S Cavuoti, A. Cimatti, C. Colodro-Conde, G. Congedo, Christopher J. Conselice, L Conversi, Y. Copin, F Courbin, H. M. Courtois, M. Cropper, A da Silva, H. Degaudenzi, G. De Lucia, F. Dubath, C. A. J. Duncan, X. Dupac, S. Dusini, S. Escoffier, M. Farina, R. Farinelli, F Faustini, S Ferriol, P. Fosalba, N. Fourmanoit, M Frailis, E. Franceschi, M. Fumana, K. George, B. Gillis, C. Giocoli, J. Gracia-Carpio, A. Grazian, F. Grupp, L. Guzzo, S. V. H. Haugan, J. Hoar, Henk Hoekstra, W. Holmes, I. Hook, F. Hormuth, A. Hornstrup, M. Jhabvala, B. Joachimi, E Keihänen, S. Kermiche, A. Kiessling, M. Kilbinger, B. Kubik, M. Kümmel, M Kunz, H. Kurki‐Suonio, A.M.C Le Brun, S Ligori, P. B. Lilje, V. Lindholm, I. Lloro, G. Mainetti, E Maiorano, O Mansutti, O Marggraf, M. Martinelli, N. Martinet, R. Massey, E. Medinaceli, S. Mei, M. Melchior, Y. Mellier, M. Meneghetti, E. Merlin, G. Meylan, A. Mora, M. Moresco, L. Moscardini, R Nakajima, C Neissner, S. -M. Niemi, C. Padilla, S. Paltani, F. Pasian, K Pedersen, V. Pettorino, S. Pires, G Polenta, Marion Poncet, L. A. Popa, L. Pozzetti, F Raison, A. Renzi, J Rhodes, G. Riccio, E. Romelli, M. Roncarelli, E. Rossetti, R. P. Saglia, Z. Sakr, D Sapone, B. Sartoris, M. Schirmer, P Schneider, T. Schrabback, A Secroun, G. Seidel, Sergio Serrano, Pardis Simon, C Sirignano, L. Stančo, J. Steinwagner, P Tallada-Crespí, A. N. Taylor, I Tereno, N Tessore, Sune Toft, R. Toledo-Moreo, F. Torradeflot, I. Tutusaus, L. Valenziano, J. Valiviita, T. Vassallo, A Veropalumbo, Yun Wang, J. Weller, G. Zamorani, F. M. Zerbi, E Zucca, J. Martín-Fleitas, V. Scottez, M Viel
0Citations signalées, ce qui n’est pas une note de qualité
111Institutions déclarées
21Pays d’affiliation déclarés
Rattachement africain : gb, Afrique du Sud, us, de, nl, sk, dk, ch, it, fr, es, pt, rs, no, fi, lb, ca, ro, cl, at, ru.
Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
We present a search for z ≃ 7 Lyman-break galaxies using the 1.72 deg 2 near-infrared (NIR) UltraVISTA survey in the COSMOS field, reaching 5 σ depths in Y of 26.2. We incorporated deep Euclid optical and Euclid + Spitzer NIR imaging for a full spectral energy distribution (SED) fitting analysis. We found 289 candidate galaxies at 6.5 ≤ z ≤ 7.5 covering −22.6 ≤ M UV ≤ −20.2, faint enough to overlap with Hubble Space Telescope studies. We conducted a separate selection by including complementary Euclid performance verification imaging (reaching 5 σ depths of 26.3), yielding 140 galaxies in 0.65 deg 2 , with 38 sources unique to this sample. We computed the rest-frame UV luminosity function (UV LF) from our samples, extending below the knee ( M ∗ = 21.14 +0.28 −0.25 ). We find that the shape of the UV LF is consistent with both a Schechter function and a double power law (DPL) at the magnitudes probed by this sample, with a DPL preferred at M UV < −22.5 when bright-end results are included. The UltraVISTA + Euclid sample provides a clean measurement of the LF due to the overlapping NIR filters identifying molecular absorption features in the SEDs of ultra-cool dwarf interlopers, and additional faint galaxies were recovered. A comparison with JWST LFs at z > 7 suggests a gentle evolution in the bright-end slope, although this is limited by a lack of robust bright-end measurements at z > 9. We forecast that in the Euclid Deep Fields, the removal of contaminant ultra-cool dwarfs as point sources will be possible at J E < 24.5. Finally, we present a high-equivalent-width Lyman- α emitter candidate identified by combining HSC, VISTA, and Euclid broadband photometry, highlighting the synergistic power these instruments will have in the Euclid Auxiliary Fields for identifying extreme sources in the epoch of reionisation.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé, mais le titre doit être comparé manuellement.
- Titre Crossref
- <i>Euclid</i>
: Discovery of bright
<i>z</i>
≃ 7 Lyman-break galaxies in UltraVISTA and
<i>Euclid</i>
COSMOS
- Date Crossref
- 01/03/2026
- Éditeur
- EDP Sciences
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Les institutions déclarées
University of OxfordSKA ObservatoryUniversity of the Western CapeKavli Institute for Particle Astrophysics and CosmologyMassachusetts Institute of TechnologyMax Planck Institute for AstronomyUniversity of PortsmouthUniversity of GroningenDAWN Center for Independent LivingAstronomical Institute of the Slovak Academy of SciencesUniversity of SussexLeiden UniversityUniversity of CopenhagenUniversity of GenevaUniversity of SurreyBrera Astronomical ObservatoryOsservatorio di Astrofisica e Scienza dello SpazioScuola Internazionale Superiore di Studi AvanzatiTrieste Astronomical ObservatoryIstituto Nazionale di Fisica Nucleare, Sezione di TriesteInstitute for Fundamental Physics of the UniverseOsservatorio astronomico di BolognaIstituto Nazionale di Fisica Nucleare, Sezione di BolognaUniversity of BolognaIstituto Nazionale di Fisica Nucleare, Sezione di GenovaUniversity of GenoaAstronomical Observatory of CapodimonteFederico II University HospitalIstituto Nazionale di Fisica Nucleare, Sezione di TorinoOsservatorio Astrofisico di TorinoUniversity of TurinEuropean Space AgencyEuropean Space Research and Technology CentreNational Institute for AstrophysicsPort d'Informació CientíficaCentro de Investigaciones Energéticas, Medioambientales y TecnológicasAstronomical Observatory of RomeIstituto Nazionale di Fisica Nucleare, Sezione di NapoliNaples Anesthesia & Physician AssociatesUniversity of Hawaii SystemInstituto de Astrofísica de CanariasRoyal ObservatoryUK Astronomy Technology CentreEngineering Science Analysis (United States)European Space Research InstituteLyon 1 UniversitéCentre National de la Recherche ScientifiqueInstitut de Physique des 2 Infinis de LyonInstitució Catalana de Recerca i Estudis AvançatsInstitut Català de Ciències del ClimaInstitute of Space SciencesLyon CollegeUniversity College LondonUniversity of LisbonInstitute of Astrophysics and Space SciencesUniversité Paris-SaclayInstitut d'Astrophysique SpatialeIstituto Nazionale di Fisica Nucleare, Sezione di PadovaAix-Marseille UniversitéCentre de physique des particules de MarseilleInstitute for Space Astrophysics and PlanetologyUnited Kingdom Space AgencyInstitut d'Estudis Espacials de CatalunyaAstronomical ObservatoryMax Planck Institute for Extraterrestrial PhysicsOsservatorio Astronomico di PadovaLudwig-Maximilians-Universität MünchenUniversity of MilanIstituto Nazionale di Fisica Nucleare, Sezione di MilanoUniversity of OsloJet Propulsion LaboratoryLancaster UniversityFelix ScholarshipTechnical University of DenmarkGoddard Space Flight CenterHelsinki Institute of PhysicsUniversité Paris CitéCommissariat à l'Énergie Atomique et aux Énergies AlternativesAstrophysique, Instrumentation et ModélisationCEA Paris-SaclayLaboratoire de Physique ThéoriqueUniversité Paris Sciences et LettresSorbonne UniversitéCentre de Calcul de l’Institut National de Physique Nucléaire et de Physique des ParticulesUniversity of BonnIstituto Nazionale di Fisica Nucleare, Sezione di Roma IInternational University of BeirutFHNW University of Applied Sciences and Arts Northwestern SwitzerlandInstitut d'Astrophysique de ParisÉcole Polytechnique Fédérale de LausanneInstitute for High Energy PhysicsUniversity of WaterlooPerimeter InstituteCentre National d'Études SpatialesInstitute of Space Science - INFLPR SubsidiaryUniversity of PaduaUniversité Toulouse III - Paul SabatierUniversité Fédérale de Toulouse Midi-PyrénéesUniversity of Saint JosephHeidelberg UniversitySt. Joseph Medical CenterInstitut de Recherche en Astrophysique et PlanétologieHeidelberg Institute for Theoretical StudiesUniversity of ChileUniversität InnsbruckPark UniversityCalifornia Institute of TechnologyInfrared Processing and Analysis CenterUniversidad Politécnica de CartagenaUniversité Catholique de LilleComputing Center
Une affiliation ne permet pas de déduire la nationalité d’un auteur.
Les sujets associés
Astronomy and Astrophysical ResearchAstronomical Observations and InstrumentationScientific Research and Discoveries