Euclid preparation: XI. Mean redshift determination from galaxy redshift probabilities for cosmic shear tomography
Creators: name: Euclid Collaboration
name: Ilbert, O.
name: de la Torre, S.
name: Martinet, N.
name: Wright, A. H.
name: Paltani, S.
name: Laigle, C.
name: Davidzon, I.
name: Jullo, E.
name: Hildebrandt, H.
name: Masters, D. C.
name: Amara, A.
name: Conselice, C. J.
name: Andreon, S.
name: Auricchio, N.
name: Azzollini, R.
name: Baccigalupi, C.
name: Balaguera-Antolínez, A.
name: Baldi, M.
name: Balestra, A.
name: Bardelli, S.
name: Bender, R.
name: Biviano, A.
name: Bodendorf, C.
name: Bonino, D.
name: Borgani, S.
name: Boucaud, A.
name: Bozzo, E.
name: Branchini, E.
name: Brescia, M.
name: Burigana, C.
name: Cabanac, R.
name: Camera, S.
name: Capobianco, V.
name: Cappi, A.
name: Carbone, C.
name: Carretero, J.
name: Carvalho, C. S.
name: Casas, S.
name: Castander, F. J.
name: Castellano, M.
name: Castignani, G.
name: Cavuoti, S.
name: Cimatti, A.
name: Cledassou, R.
name: Colodro-Conde, C.
name: Congedo, G.
name: Conversi, L.
name: Copin, Y.
name: Corcione, L.
name: Costille, A.
name: Coupon, J.
name: Courtois, H. M.
name: Cropper, M.
name: Cuby, J.
name: Da Silva, A.
name: Degaudenzi, H.
name: Di Ferdinando, D.
name: Dubath, F.
name: Duncan, C.
name: Dupac, X.
name: Dusini, S.
name: Ealet, A.
name: Fabricius, M.
name: Farrens, S.
name: Ferreira, P. G.
name: Finelli, F.
name: Fosalba, P.
name: Fotopoulou, S.
name: Franceschi, E.
name: Franzetti, P.
name: Galeotta, S.
name: Garilli, B.
name: Gillard, W.
name: Gillis, B.
name: Giocoli, C.
name: Gozaliasl, G.
name: Graciá-Carpio, J.
name: Grupp, F.
name: Guzzo, L.
name: Haugan, S. V. H.
name: Holmes, W.
name: Hormuth, F.
name: Jahnke, K.
name: Keihanen, E.
name: Kermiche, S.
name: Kiessling, A.
name: Kirkpatrick, C. C.
name: Kunz, M.
name: Kurki-Suonio, H.
name: Ligori, S.
name: Lilje, P. B.
name: Lloro, I.
name: Maino, D.
name: Maiorano, E.
name: Marggraf, O.
name: Markovic, K.
name: Marulli, F.
name: Massey, R.
name: Maturi, M.
name: Mauri, N.
name: Maurogordato, S.
name: McCracken, H. J.
name: Medinaceli, E.
name: Mei, S.
name: Metcalf, R. Benton
name: Moresco, M.
name: Morin, B.
name: Moscardini, L.
name: Munari, E.
name: Nakajima, R.
name: Neissner, C.
name: Niemi, S.
name: Nightingale, J.
name: Padilla, C.
name: Pasian, F.
name: Patrizii, L.
name: Pedersen, K.
name: Pello, R.
name: Pettorino, V.
name: Pires, S.
name: Polenta, G.
name: Poncet, M.
name: Popa, L.
name: Potter, D.
name: Pozzetti, L.
name: Raison, F.
name: Renzi, A.
name: Rhodes, J.
name: Riccio, G.
name: Romelli, E.
name: Roncarelli, M.
name: Rossetti, E.
name: Saglia, R.
name: Sánchez, A. G.
name: Sapone, D.
name: Schneider, P.
name: Schrabback, T.
name: Scottez, V.
name: Secroun, A.
name: Seidel, G.
name: Serrano, S.
name: Sirignano, C.
name: Sirri, G.
name: Stanco, L.
name: Sureau, F.
name: Crespí, P. Tallada
name: Tenti, M.
name: Teplitz, H. I.
name: Tereno, I.
name: Toledo-Moreo, R.
name: Torradeflot, F.
name: Tramacere, A.
name: Valentijn, E. A.
name: Valenziano, L.
name: Valiviita, J.
name: Vassallo, T.
name: Wang, Y.
name: Welikala, N.
name: Weller, J.
name: Whittaker, L.
name: Zacchei, A.
name: Zamorani, G.
name: Zoubian, J.
name: Zucca, E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: The analysis of weak gravitational lensing in wide-field imaging surveys is considered to be a major cosmological probe of dark energy. Our capacity to constrain the dark energy equation of state relies on the accurate knowledge of the galaxy mean redshift $\langle z \rangle$. We investigate the possibility of measuring $\langle z \rangle$ with an accuracy better than $0.002\,(1+z)$, in ten tomographic bins spanning the redshift interval $0.299.8\%$. The zPDF approach could also be successful if we debias the zPDF using a spectroscopic training sample. This approach requires deep imaging data, but is weakly sensitive to spectroscopic redshift failures in the training sample. We improve the debiasing method and confirm our finding by applying it to real-world weak-lensing data sets (COSMOS and KiDS+VIKING-450).
description: 21 pages, 10 figures, accepted in A&amp;A