Article

<i>Euclid</i> preparation

R. AdamCentro de Estudios de Física del Cosmos de Aragón (CEFCA), Plaza San Juan, 1, planta 2, 44001 Teruel, SpainMichael W. VannierUniversité Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange, FranceS. MaurogordatoUniversité Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange, FranceA. BivianoINAF-Osservatorio Astronomico di Trieste, via G. B. Tiepolo 11, 34143 Trieste, ItalyC. AdamiAix Marseille Univ., CNRS, CNES, LAM, Marseille, FranceB. AscasoSorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, 75014 Paris, FranceF. BellagambaDipartimento di Fisica e Astronomia, Università di Bologna, via Gobetti 93/2, 40129 Bologna, ItalyC. BenoistUniversité Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange, FranceA. CappiIstituto Nazionale di Astrofisica (INAF) – Osservatorio di Astrofisica e Scienza dello Spazio (OAS), via Gobetti 93/3, 40127 Bologna, ItalyA. Díaz‐SánchezDepartamento Física Aplicada, Universidad Politécnica de Cartagena, Campus Muralla del Mar, 30202 Cartagena, Murcia, SpainF. DurretInstitut d’Astrophysique de Paris (UMR 7095: CNRS & Sorbonne Université), 98 bis Bd Arago, 75014 Paris, FranceS. FarrensIRFU, CEA, Université Paris-Saclay, 91191 Gif Sur Yvette, FranceA. H. GonzalezDepartment of Astronomy, University of Florida, Bryant Space Science Center, Gainesville, FL 32611, USAA. IovinoINAF – Osservatorio Astronomico di Brera, via Brera 28, 20122 Milano, via. E. Bianchi 46, 23807 Merate, ItalyR. LicitraSorbonne Université, Observatoire de Paris, Université PSL, CNRS, LERMA, 75014 Paris, FranceM. MaturiZentrum für Astronomie, Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg, GermanyS MeiJet Propulsion Laboratory, Cahill Center for Astronomy & Astrophysics, California Institute of Technology, 4800 Oak Grove Drive, Pasadena CA, USAA. MersonInfrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125, USAE. MunariDark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, DenmarkR. PellóInstitut de Recherche en Astrophysique et Planétologie (IRAP), Université de Toulouse, CNRS, UPS, CNES, 14 Av. Edouard Belin, 31400 Toulouse, FranceM. RicciUniversité Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange, FranceP.-F RocciUniversité Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange, FranceM. RoncarelliDipartimento di Fisica e Astronomia, Università di Bologna, via Gobetti 93/2, 40129 Bologna, ItalyF. SarronInstitut d’Astrophysique de Paris (UMR 7095: CNRS & Sorbonne Université), 98 bis Bd Arago, 75014 Paris, FranceYuba AmouraInstitut d’Astrophysique de Paris (UMR 7095: CNRS & Sorbonne Université), 98 bis Bd Arago, 75014 Paris, FranceS. AndreonINAF – Osservatorio Astronomico di Brera, via Brera 28, 20122 Milano, via. E. Bianchi 46, 23807 Merate, ItalyN. ApostolakosDepartment of Astronomy, University of Geneva, ch. dÉcogia 16, 1290 Versoix, SwitzerlandM. ArnaudIRFU, CEA, Université Paris-Saclay, 91191 Gif Sur Yvette, FranceS. BardelliIstituto Nazionale di Astrofisica (INAF) – Osservatorio di Astrofisica e Scienza dello Spazio (OAS), via Gobetti 93/3, 40127 Bologna, ItalyJ. BartlettAPC, AstroParticule et Cosmologie, Université Paris Diderot, CNRS/IN2P3, CEA/lrfu, Observatoire de Paris, Sorbonne Paris Cité, 10 rue Alice Domon et Léonie Duquet, 75205 Paris Cedex 13, FranceC. M. BaughInstitute for Computational Cosmology, Department of Physics, Durham University, South Road, Durham DH1 3LE, UKS. BorganiDipartimento di Fisica – Sezione di Astronomia, Università di Trieste, via Tiepolo 11, 34131 Trieste, ItalyM. BrodwinDepartment of Physics and Astronomy, University of Missouri, 5110 Rockhill Road, Kansas City, MO 64110, USAF. J. CastanderInstitut d’Estudis Espacials de Catalunya (IEEC), 08193 Barcelona, SpainG. CastignaniCollège de France, 11 Place Marcelin Berthelot, 75231 Paris, FranceO. CucciatiIstituto Nazionale di Astrofisica (INAF) – Osservatorio di Astrofisica e Scienza dello Spazio (OAS), via Gobetti 93/3, 40127 Bologna, ItalyG. De LuciaINAF-Osservatorio Astronomico di Trieste, via G. B. Tiepolo 11, 34143 Trieste, ItalyP. DubathDepartment of Astronomy, University of Geneva, ch. dÉcogia 16, 1290 Versoix, SwitzerlandP. FosalbaInstitut d’Estudis Espacials de Catalunya (IEEC), 08193 Barcelona, SpainC. GiocoliDipartimento di Fisica e Astronomia, Università di Bologna, via Gobetti 93/2, 40129 Bologna, ItalyH. HoekstraLeiden Observatory, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The NetherlandsG. A. MamonInstitut d’Astrophysique de Paris (UMR 7095: CNRS & Sorbonne Université), 98 bis Bd Arago, 75014 Paris, FranceJ. B. MelinIRFU, CEA, Université Paris-Saclay, 91191 Gif Sur Yvette, FranceL. MoscardiniDipartimento di Fisica e Astronomia, Università di Bologna, via Gobetti 93/2, 40129 Bologna, ItalyS. PaltaniDepartment of Astronomy, University of Geneva, ch. dÉcogia 16, 1290 Versoix, SwitzerlandM. RadovichINAF – Osservatorio Astronomico di Padova, Vicolo Osservatorio 5, 35122 Padova, ItalyB. SartorisM. SchultheisUniversité Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange, FranceM. SerenoDipartimento di Fisica e Astronomia, Università di Bologna, via Gobetti 93/2, 40129 Bologna, ItalyJ. WellerExcellence Cluster Universe, Boltzmannstr. 2, 85748 Garching, GermanyC. BuriganaDipartimento di Fisica e Scienze della Terra, Universitá di Ferrara, Via Giuseppe Saragat 1, 44122 Ferrara, ItalyC. S. CarvalhoInstituto de Astrofísica e Ciências do Espaço, Faculdade de Ciências, Universidade de Lisboa, Tapada da Ajuda, 1349-018 Lisboa, PortugalL. CorcioneINAF – Osservatorio Astrofisico di Torino, via Osservatorio 20, 10025 Pino Torinese (TO), ItalyH. Kurki‐SuonioDepartment of Physics and Helsinki Institute of Physics, University of Helsinki, Gustaf Hällströmin katu 2, 00014 FinlandP. B. LiljeInstitute of Theoretical Astrophysics, University of Oslo, PO Box 1029 Blindern, 0315 Oslo, NorwayG. SirriINFN – Sezione di Bologna, viale Berti-Pichat 6/2, 40127 Bologna, ItalyR. Toledo-MoreoUniversidad Politcnica de Cartagena, Departamento de Electrnica y Tecnologa de Computadoras, 30202 Cartagena, SpainG. ZamoraniIstituto Nazionale di Astrofisica (INAF) – Osservatorio di Astrofisica e Scienza dello Spazio (OAS), via Gobetti 93/3, 40127 Bologna, Italy

2019en

ABI

Abstract

Galaxy cluster counts in bins of mass and redshift have been shown to be a competitive probe to test cosmological models. This method requires an efficient blind detection of clusters from surveys with a well-known selection function and robust mass estimates, which is particularly challenging at high redshift. The Euclid wide survey will cover 15 000 deg 2 of the sky, avoiding contamination by light from our Galaxy and our solar system in the optical and near-infrared bands, down to magnitude 24 in the H -band. The resulting data will make it possible to detect a large number of galaxy clusters spanning a wide-range of masses up to redshift ∼2 and possibly higher. This paper presents the final results of the Euclid Cluster Finder Challenge (CFC), fourth in a series of similar challenges. The objective of these challenges was to select the cluster detection algorithms that best meet the requirements of the Euclid mission. The final CFC included six independent detection algorithms, based on different techniques, such as photometric redshift tomography, optimal filtering, hierarchical approach, wavelet and friend-of-friends algorithms. These algorithms were blindly applied to a mock galaxy catalog with representative Euclid -like properties. The relative performance of the algorithms was assessed by matching the resulting detections to known clusters in the simulations down to masses of M 200 ∼ 10 13.25 M ⊙ . Several matching procedures were tested, thus making it possible to estimate the associated systematic effects on completeness to < 3%. All the tested algorithms are very competitive in terms of performance, with three of them reaching > 80% completeness for a mean purity of 80% down to masses of 10 14 M ⊙ and up to redshift z = 2. Based on these results, two algorithms were selected to be implemented in the Euclid pipeline, the Adaptive Matched Identifier of Clustered Objects (AMICO) code, based on matched filtering, and the PZWav code, based on an adaptive wavelet approach.

Identifiers

DOI: 10.1051/0004-6361/201935088

Citations and references

Cited by 20 references

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