Euclid: Photometric redshift calibration with the clustering redshifts technique
Euclid: Photometric redshift calibration with the clustering redshifts technique
Aims: The precision of cosmological constraints from imaging surveys hinges on accurately estimating the redshift distribution $ n(z) $ of tomographic bins, especially their mean redshifts. We assess the effectiveness of the clustering redshifts technique in constraining Euclid tomographic redshift bins to meet the target uncertainty of $ \sigma ( \langle z \rangle ) < 0.002 (1 + z) $. In this work, these mean redshifts are inferred from the small-scale angular clustering of Euclid galaxies, which are distributed into bins with spectroscopic samples localised in narrow redshift slices. Methods: We generate spectroscopic mocks from the Flagship2 simulation for the Baryon Oscillation Spectroscopic Survey (BOSS), the Dark Energy Spectroscopic Instrument (DESI), and Euclid's Near-Infrared Spectrometer and Photometer (NISP) spectroscopic survey. We evaluate and optimise the clustering redshifts pipeline, introducing a new method for measuring photometric galaxy bias (clustering), which is the primary limitation of this technique. Results: We have successfully constrained the means and standard deviations of the redshift distributions for all of the tomographic bins (with a maximum photometric redshift of 1.6), achieving precision beyond the required thresholds. We have identified the main sources of bias, particularly the impact of the 1-halo galaxy distribution, which imposed a minimal separation scale of 1.5 Mpc for evaluating cross-correlations. These results demonstrate the potential of clustering redshifts to meet the precision requirements for Euclid, and we highlight several avenues for future improvements.
W. d'Assignies Doumerg、M. Manera、C. Padilla、O. Ilbert、H. Hildebrandt、L. Reynolds、J. Chaves-Montero、A. H. Wright、P. Tallada-Crespí、M. Eriksen、J. Carretero、W. Roster、Y. Kang、K. Naidoo、R. Miquel、B. Altieri、A. Amara、S. Andreon、N. Auricchio、C. Baccigalupi、D. Bagot、L. Stanco、J. Steinwagner、G. Congedo、C. J. Conselice、L. Conversi、Y. Copin、F. Courbin、H. M. Courtois、M. Crocce、A. Da Silva、H. Degaudenzi、S. de la Torre、G. De Lucia、M. Douspis、X. Dupac、A. Ealet、S. Escoffier、M. Farina、F. Faustini、S. Ferriol、F. Finelli、P. Fosalba、S. Fotopoulou、M. Frailis、I. Tereno、A. N. Taylor、L. Valenziano、J. Valiviita、M. Seiffert、A. Spurio Mancini、H. I. Teplitz、M. Baldi、A. Balestra、S. Bardelli、P. Battaglia、A. Biviano、E. Branchini、M. Brescia、S. Camera、V. Capobianco、C. Carbone、V. F. Cardone、S. Casas、F. J. Castander、M. Castellano、G. Castignani、S. Cavuoti、K. C. Chambers、A. Cimatti、C. Colodro-Conde、N. Tessore、I. Lloro、G. Mainetti、D. Maino、E. Maiorano、O. Mansutti、S. Marcin、O. Marggraf、K. Markovic、M. Martinelli、N. Martinet、F. Marulli、R. Massey、D. C. Masters、E. Medinaceli、S. Mei、M. Melchior、Y. Mellier、M. Meneghetti、E. Merlin、G. Meylan、A. Mora、M. Moresco、L. Moscardini、G. Sirri、S. Toft、R. Toledo-Moreo、F. Torradeflot、A. Tsyganov、I. Tutusaus、D. Tavagnacco、C. Neissner、S. -M. Niemi、S. Paltani、F. Pasian、K. Pedersen、V. Pettorino、G. Zamorani、T. Vassallo、I. Risso、S. Pires、G. Polenta、M. Poncet、L. A. Popa、L. Pozzetti、F. Raison、R. Rebolo、A. Renzi、J. Rhodes、G. Riccio、E. Romelli、M. Roncarelli、E. Rossetti、R. Saglia、Z. Sakr、D. Sapone、B. Sartoris、J. A. Schewtschenko、P. Schneider、T. Schrabback、A. Secroun、E. Sefusatti、Y. Wang、M. Viel、G. Verdoes Kleijn、E. Zucca、J. Weller、V. Scottez、M. Bolzonella、C. Burigana、L. Gabarra、J. Martín-Fleitas、E. Franceschi、M. Fumana、S. Galeotta、K. George、B. Gillis、C. Giocoli、P. Gómez-Alvarez、J. Gracia-Carpio、A. Grazian、F. Grupp、W. Holmes、I. M. Hook、A. Hornstrup、K. Jahnke、M. Jhabvala、B. Joachimi、E. Keih?nen、S. Kermiche、A. Kiessling、B. Kubik、M. Kümmel、M. Kunz、H. Kurki-Suonio、O. Lahav、A. M. C. Le Brun、S. Ligori、P. B. Lilje、V. Lindholm、S. Serrano、P. Simon、C. Sirignano、G. Seidel
Institut de Física d'Altes EnergiesSerra Húnter Fellow, Departament de Física, Universitat Autònoma de Barcelona, E-08193 Bellaterra, SpainInstitut de Física d'Altes EnergiesAix-Marseille Université, CNRS, CNES, LAM, Marseille, FranceRuhr University Bochum, Faculty of Physics and Astronomy, Astronomical InstituteInstitut de Física d'Altes EnergiesInstitut de Física d'Altes EnergiesRuhr University Bochum, Faculty of Physics and Astronomy, Astronomical InstituteCentro de Investigaciones Energéticas, Medioambientales y TecnológicasInstitut de Física d'Altes EnergiesCentro de Investigaciones Energéticas, Medioambientales y TecnológicasMax Planck Institute for Extraterrestrial Physics, Giessenbachstr. 1, 85748 Garching, GermanyDepartment of Astronomy, University of Geneva, ch. d'Ecogia 16, 1290 Versoix, SwitzerlandInstitute of Cosmology and Gravitation, University of Portsmouth, Portsmouth PO1 3FX, UKInstitut de Física d'Altes EnergiesESAC/ESA, Camino Bajo del Castillo, s/n., Urb. Villafranca del Castillo, 28692 Villanueva de la Ca?ada, Madrid, SpainSchool of Mathematics and Physics, University of Surrey, Guildford, Surrey, GU2 7XH, UKINAF-Osservatorio Astronomico di Brera, Via Brera 28, 20122 Milano, ItalyINAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, Via Piero Gobetti 93/3, 40129 Bologna, ItalyIFPU, Institute for Fundamental Physics of the Universe, via Beirut 2, 34151 Trieste, ItalyCentre National d'Etudes Spatiales -- Centre spatial de Toulouse, 18 avenue Edouard Belin, 31401 Toulouse Cedex 9, FranceINFN-Padova, Via Marzolo 8, 35131 Padova, ItalyMax Planck Institute for Extraterrestrial Physics, Giessenbachstr. 1, 85748 Garching, GermanyInstitute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UKJodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, UKEuropean Space Agency/ESRIN, Largo Galileo Galilei 1, 00044 Frascati, Roma, ItalyUniversité Claude Bernard Lyon 1, CNRS/IN2P3, IP2I Lyon, UMR 5822, Villeurbanne, F-69100, FranceInstitut de Ciències del CosmosUCB Lyon 1, CNRS/IN2P3, IUF, IP2I Lyon, 4 rue Enrico Fermi, 69622 Villeurbanne, FranceInstitute of Space SciencesDepartamento de Física, Faculdade de Ciências, Universidade de Lisboa, Edifício C8, Campo Grande, PT1749-016 Lisboa, PortugalDepartment of Astronomy, University of Geneva, ch. d'Ecogia 16, 1290 Versoix, SwitzerlandAix-Marseille Université, CNRS, CNES, LAM, Marseille, FranceINAF-Osservatorio Astronomico di Trieste, Via G. B. Tiepolo 11, 34143 Trieste, ItalyUniversité Paris-Saclay, CNRS, Institut d'astrophysique spatiale, 91405, Orsay, FranceESAC/ESA, Camino Bajo del Castillo, s/n., Urb. Villafranca del Castillo, 28692 Villanueva de la Ca?ada, Madrid, SpainUniversité Claude Bernard Lyon 1, CNRS/IN2P3, IP2I Lyon, UMR 5822, Villeurbanne, F-69100, FranceAix-Marseille Université, CNRS/IN2P3, CPPM, Marseille, FranceINAF-Istituto di Astrofisica e Planetologia Spaziali, via del Fosso del Cavaliere, 100, 00100 Roma, ItalyINAF-Osservatorio Astronomico di Roma, Via Frascati 33, 00078 Monteporzio Catone, ItalyUniversité Claude Bernard Lyon 1, CNRS/IN2P3, IP2I Lyon, UMR 5822, Villeurbanne, F-69100, FranceINAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, Via Piero Gobetti 93/3, 40129 Bologna, ItalyInstitut d'Estudis Espacials de CatalunyaSchool of Physics, HH Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol, BS8 1TL, UKINAF-Osservatorio Astronomico di Trieste, Via G. B. Tiepolo 11, 34143 Trieste, ItalyDepartamento de Física, Faculdade de Ciências, Universidade de Lisboa, Edifício C8, Campo Grande, PT1749-016 Lisboa, PortugalInstitute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UKINAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, Via Piero Gobetti 93/3, 40129 Bologna, ItalyDepartment of Physics, P.O. Box 64, 00014 University of Helsinki, FinlandJet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA, 91109, USADepartment of Physics, Royal Holloway, University of London, TW20 0EX, UKInfrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125, USADipartimento di Fisica e Astronomia, Università di Bologna, Via Gobetti 93/2, 40129 Bologna, ItalyINAF-Osservatorio Astronomico di Padova, Via dell'Osservatorio 5, 35122 Padova, ItalyINAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, Via Piero Gobetti 93/3, 40129 Bologna, ItalyINAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, Via Piero Gobetti 93/3, 40129 Bologna, ItalyINAF-Osservatorio Astronomico di Trieste, Via G. B. Tiepolo 11, 34143 Trieste, ItalyDipartimento di Fisica, Università di Genova, Via Dodecaneso 33, 16146, Genova, ItalyDepartment of Physics "E. 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Giuria 1, 10125 Torino, ItalyINAF-Osservatorio Astrofisico di Torino, Via Osservatorio 20, 10025 Pino TorineseINAF-IASF Milano, Via Alfonso Corti 12, 20133 Milano, ItalyINAF-Osservatorio Astronomico di Roma, Via Frascati 33, 00078 Monteporzio Catone, ItalyInstitute for Theoretical Particle Physics and CosmologyInstitute of Space SciencesINAF-Osservatorio Astronomico di Roma, Via Frascati 33, 00078 Monteporzio Catone, ItalyINAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, Via Piero Gobetti 93/3, 40129 Bologna, ItalyINAF-Osservatorio Astronomico di Capodimonte, Via Moiariello 16, 80131 Napoli, ItalyInstitute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USADipartimento di Fisica e Astronomia "Augusto Righi" - Alma Mater Studiorum Università di Bologna, Viale Berti Pichat 6/2, 40127 Bologna, ItalyInstituto de Astrofísica de Canarias, Vía Láctea, 38205 La Laguna, Tenerife, SpainDepartment of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UKSKA Observatory, Jodrell Bank, Lower Withington, Macclesfield, Cheshire SK11 9FT, UKCentre de Calcul de l'IN2P3/CNRS, 21 avenue Pierre de Coubertin 69627 Villeurbanne Cedex, FranceDipartimento di Fisica "Aldo Pontremoli", Università degli Studi di Milano, Via Celoria 16, 20133 Milano, ItalyINAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, Via Piero Gobetti 93/3, 40129 Bologna, ItalyINAF-Osservatorio Astronomico di Trieste, Via G. 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Tiepolo 11, 34143 Trieste, ItalyUniversity of Applied Sciences and Arts of Northwestern Switzerland, School of Computer Science, 5210 Windisch, SwitzerlandUniversit?t Bonn, Argelander-Institut für Astronomie, Auf dem Hügel 71, 53121 Bonn, GermanyJet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA, 91109, USAINAF-Osservatorio Astronomico di Roma, Via Frascati 33, 00078 Monteporzio Catone, ItalyAix-Marseille Université, CNRS, CNES, LAM, Marseille, FranceDipartimento di Fisica e Astronomia "Augusto Righi" - Alma Mater Studiorum Università di Bologna, via Piero Gobetti 93/2, 40129 Bologna, ItalyDepartment of Physics, Institute for Computational Cosmology, Durham University, South Road, Durham, DH1 3LE, UKInfrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125, USAINAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, Via Piero Gobetti 93/3, 40129 Bologna, ItalyUniversité Paris Cité, CNRS, Astroparticule et Cosmologie, 75013 Paris, FranceUniversity of Applied Sciences and Arts of Northwestern Switzerland, School of Engineering, 5210 Windisch, SwitzerlandInstitut d'Astrophysique de Paris, 98bis Boulevard Arago, 75014, Paris, FranceINAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, Via Piero Gobetti 93/3, 40129 Bologna, ItalyINAF-Osservatorio Astronomico di Roma, Via Frascati 33, 00078 Monteporzio Catone, ItalyInstitute of Physics, Laboratory of Astrophysics, Ecole Polytechnique Fédérale de LausanneTelespazio UK S.L. for European Space AgencyDipartimento di Fisica e Astronomia "Augusto Righi" - Alma Mater Studiorum Università di Bologna, via Piero Gobetti 93/2, 40129 Bologna, ItalyDipartimento di Fisica e Astronomia "Augusto Righi" - Alma Mater Studiorum Università di Bologna, via Piero Gobetti 93/2, 40129 Bologna, ItalyINFN-Sezione di Bologna, Viale Berti Pichat 6/2, 40127 Bologna, ItalyCosmic Dawn CenterUniversidad Politécnica de Cartagena, Departamento de Electrónica y Tecnología de Computadoras, Plaza del Hospital 1, 30202 Cartagena, SpainPort d'Informació Científica, Campus UAB, C. Albareda s/n, 08193 BellaterraCentre for Information Technology, University of Groningen, P.O. Box 11044, 9700 CA Groningen, The NetherlandsInstitut de Recherche en Astrophysique et PlanétologieINAF-Osservatorio Astronomico di Trieste, Via G. B. Tiepolo 11, 34143 Trieste, ItalyInstitut de Física d'Altes EnergiesEuropean Space Agency/ESTEC, Keplerlaan 1, 2201 AZ Noordwijk, The NetherlandsDepartment of Astronomy, University of Geneva, ch. d'Ecogia 16, 1290 Versoix, SwitzerlandINAF-Osservatorio Astronomico di Trieste, Via G. B. Tiepolo 11, 34143 Trieste, ItalyDARK, Niels Bohr Institute, University of Copenhagen, Jagtvej 155, 2200 Copenhagen, DenmarkEuropean Space Agency/ESTEC, Keplerlaan 1, 2201 AZ Noordwijk, The NetherlandsINAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, Via Piero Gobetti 93/3, 40129 Bologna, ItalyUniversit?ts-Sternwarte München, Fakult?t für Physik, Ludwig-Maximilians-Universit?t München, Scheinerstrasse 1, 81679 München, GermanyINAF-Osservatorio Astronomico di Brera, Via Brera 28, 20122 Milano, Italy, and INFN-Sezione di Genova, Via Dodecaneso 33, 16146, Genova, ItalyUniversité Paris-Saclay, Université Paris Cité, CEA, CNRS, AIM, 91191, Gif-sur-Yvette, FranceSpace Science Data Center, Italian Space Agency, via del Politecnico snc, 00133 Roma, ItalyCentre National d'Etudes Spatiales -- Centre spatial de Toulouse, 18 avenue Edouard Belin, 31401 Toulouse Cedex 9, FranceInstitute of Space Science, Str. Atomistilor, nr. 409 M?gurele, Ilfov, 077125, RomaniaINAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, Via Piero Gobetti 93/3, 40129 Bologna, ItalyMax Planck Institute for Extraterrestrial Physics, Giessenbachstr. 1, 85748 Garching, GermanyInstituto de Astrofísica de Canarias, Vía Láctea, 38205 La Laguna, Tenerife, SpainDipartimento di Fisica e Astronomia "G. Galilei", Università di Padova, Via Marzolo 8, 35131 Padova, ItalyJet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA, 91109, USAINAF-Osservatorio Astronomico di Capodimonte, Via Moiariello 16, 80131 Napoli, ItalyINAF-Osservatorio Astronomico di Trieste, Via G. B. 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B. Tiepolo 11, 34143 Trieste, ItalyUniversit?ts-Sternwarte München, Fakult?t für Physik, Ludwig-Maximilians-Universit?t München, Scheinerstrasse 1, 81679 München, GermanyInstitute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UKINAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, Via Piero Gobetti 93/3, 40129 Bologna, ItalyFRACTAL S.L.N.E., calle Tulipán 2, Portal 13 1A, 28231, Las Rozas de Madrid, SpainMax Planck Institute for Extraterrestrial Physics, Giessenbachstr. 1, 85748 Garching, GermanyINAF-Osservatorio Astronomico di Padova, Via dell'Osservatorio 5, 35122 Padova, ItalyMax Planck Institute for Extraterrestrial Physics, Giessenbachstr. 1, 85748 Garching, GermanyJet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA, 91109, USADepartment of Physics, Lancaster University, Lancaster, LA1 4YB, UKTechnical University of Denmark, Elektrovej 327, 2800 Kgs. 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W. d'Assignies Doumerg,M. Manera,C. Padilla,O. Ilbert,H. Hildebrandt,L. Reynolds,J. Chaves-Montero,A. H. Wright,P. Tallada-Crespí,M. Eriksen,J. Carretero,W. Roster,Y. Kang,K. Naidoo,R. Miquel,B. Altieri,A. Amara,S. Andreon,N. Auricchio,C. Baccigalupi,D. Bagot,L. Stanco,J. Steinwagner,G. Congedo,C. J. Conselice,L. Conversi,Y. Copin,F. Courbin,H. M. Courtois,M. Crocce,A. Da Silva,H. Degaudenzi,S. de la Torre,G. De Lucia,M. Douspis,X. Dupac,A. Ealet,S. Escoffier,M. Farina,F. Faustini,S. Ferriol,F. Finelli,P. Fosalba,S. Fotopoulou,M. Frailis,I. Tereno,A. N. Taylor,L. Valenziano,J. Valiviita,M. Seiffert,A. Spurio Mancini,H. I. Teplitz,M. Baldi,A. Balestra,S. Bardelli,P. Battaglia,A. Biviano,E. Branchini,M. Brescia,S. Camera,V. Capobianco,C. Carbone,V. F. Cardone,S. Casas,F. J. Castander,M. Castellano,G. Castignani,S. Cavuoti,K. C. Chambers,A. Cimatti,C. Colodro-Conde,N. Tessore,I. Lloro,G. Mainetti,D. Maino,E. Maiorano,O. Mansutti,S. Marcin,O. Marggraf,K. Markovic,M. Martinelli,N. Martinet,F. Marulli,R. Massey,D. C. Masters,E. Medinaceli,S. Mei,M. Melchior,Y. Mellier,M. Meneghetti,E. Merlin,G. Meylan,A. Mora,M. Moresco,L. Moscardini,G. Sirri,S. Toft,R. Toledo-Moreo,F. Torradeflot,A. Tsyganov,I. Tutusaus,D. Tavagnacco,C. Neissner,S. -M. Niemi,S. Paltani,F. Pasian,K. Pedersen,V. Pettorino,G. Zamorani,T. Vassallo,I. Risso,S. Pires,G. Polenta,M. Poncet,L. A. Popa,L. Pozzetti,F. Raison,R. Rebolo,A. Renzi,J. Rhodes,G. Riccio,E. Romelli,M. Roncarelli,E. Rossetti,R. Saglia,Z. Sakr,D. Sapone,B. Sartoris,J. A. Schewtschenko,P. Schneider,T. Schrabback,A. Secroun,E. Sefusatti,Y. Wang,M. Viel,G. Verdoes Kleijn,E. Zucca,J. Weller,V. Scottez,M. Bolzonella,C. Burigana,L. Gabarra,J. Martín-Fleitas,E. Franceschi,M. Fumana,S. Galeotta,K. George,B. Gillis,C. Giocoli,P. Gómez-Alvarez,J. Gracia-Carpio,A. Grazian,F. Grupp,W. Holmes,I. M. Hook,A. Hornstrup,K. Jahnke,M. Jhabvala,B. Joachimi,E. Keih?nen,S. Kermiche,A. Kiessling,B. Kubik,M. Kümmel,M. Kunz,H. Kurki-Suonio,O. Lahav,A. M. C. Le Brun,S. Ligori,P. B. Lilje,V. Lindholm,S. Serrano,P. Simon,C. Sirignano,G. Seidel.Euclid: Photometric redshift calibration with the clustering redshifts technique[EB/OL].(2025-05-15)[2025-06-22].https://arxiv.org/abs/2505.10416.点此复制
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