Euclid preparation: XI. Mean redshift determination from galaxy redshift probabilities for cosmic shear tomography
Ilbert, O.; de la Torre, S.; Martinet, N.; Wright, A. H.; Paltani, S.; Laigle, C.; Davidzon, I.; Jullo, E.; Hildebrandt, H.; Masters, D. C.; Amara, A.; Conselice, C. J.; Andreon, S.; Auricchio, N.; Azzollini, R.; Baccigalupi, C.; Balaguera-Antolinez, A.; Baldi, M.; Balestra, A.; Bardelli, S.; Bender, R.; Biviano, A.; Bodendorf, C.; Bonino, D.; Borgani, S.; Boucaud, A.; Bozzo, E.; Branchini, E.; Brescia, M.; Burigana, C.; Cabanac, R.; Camera, S.; Capobianco, V.; Cappi, A.; Carbone, C.; Carretero, J.; Carvalho, C. S.; Casas, S.; Castander, F. J.; Castellano, M.; Castignani, G.; Cavuoti, S.; Cimatti, A.; Cledassou, R.; Colodro-Conde, C.; Congedo, G.; Conversi, L.; Copin, Y.; Corcione, L.; Costille, A.; Coupon, J.; Courtois, H. M.; Cropper, M.; Cuby, J.; Da Silva, A.; Degaudenzi, H.; Di Ferdinando, D.; Dubath, F.; Duncan, C.; Dupac, X.; Dusini, S.; Ealet, A.; Fabricius, M.; Farrens, S.; Ferreira, P. G.; Finelli, F.; Fosalba, P.; Fotopoulou, S.; Franceschi, E.; Franzetti, P.; Galeotta, S.; Garilli, B.; Gillard, W.; Gillis, B.; Giocoli, C.; Gozaliasl, G.; Gracia-Carpio, J.; Grupp, F.; Guzzo, L.; Haugan, S. V. H.; Holmes, W.; Hormuth, F.; Jahnke, K.; Keihanen, E.; Kermiche, S.; Kiessling, A.; Kirkpatrick, C. C.; Kunz, M.; Kurki-Suonio, H.; Ligori, S.; Lilje, P. B.; Lloro, I.; Maino, D.; Maiorano, E.; Marggraf, O.; Markovic, K.; Marulli, F.; Massey, R.; Maturi, M.; Mauri, N.; Maurogordato, S.; McCracken, H. J.; Medinaceli, E.; Mei, S.; Metcalf, R. Benton; Moresco, M.; Morin, B.; Moscardini, L.; Munari, E.; Nakajima, R.; Neissner, C.; Niemi, S.; Nightingale, J.; Padilla, C.; Pasian, F.; Patrizii, L.; Pedersen, K.; Pello, R.; Pettorino, V.; Pires, S.; Polenta, G.; Poncet, M.; Popa, L.; Potter, D.; Pozzetti, L.; Raison, F.; Renzi, A.; Rhodes, J.; Riccio, G.; Romelli, E.; Roncarelli, M.; Rossetti, E.; Saglia, R.; Sanchez, A. G.; Sapone, D.; Schneider, P.; Schrabback, T.; Scottez, V.; Secroun, A.; Seidel, G.; Serrano, S.; Sirignano, C.; Sirri, G.; Stanco, L.; Sureau, F.; Crespa, P. Tallada; Tenti, M.; Teplitz, H. I.; Tereno, I.; Toledo-Moreo, R.; Torradeflot, F.; Tramacere, A.; Valentijn, E. A.; Valenziano, L.; Valiviita, J.; Vassallo, T.; Wang, Y.; Welikala, N.; Weller, J.; Whittaker, L.; Zacchei, A.; Zamorani, G.; Zoubian, J.; Zucca, E.
2021
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Abstract
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 an accurate knowledge of the galaxy mean redshift z. We investigate the possibility of measuring z with an accuracy better than 0.002 (1+z) in ten tomographic bins spanning the redshift interval 0.2 99.8%. The zPDF approach can also be successful if the zPDF is de-biased 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 de-biasing method and confirm our finding by applying it to real-world weak-lensing datasets (COSMOS and KiDS+VIKING-450).
Details
Title
Euclid preparation: XI. Mean redshift determination from galaxy redshift probabilities for cosmic shear tomography
Author(s)
Ilbert, O. ; de la Torre, S. ; Martinet, N. ; Wright, A. H. ; Paltani, S. ; Laigle, C. ; Davidzon, I. ; Jullo, E. ; Hildebrandt, H. ; Masters, D. C. ; Amara, A. ; Conselice, C. J. ; Andreon, S. ; Auricchio, N. ; Azzollini, R. ; Baccigalupi, C. ; Balaguera-Antolinez, A. ; Baldi, M. ; Balestra, A. ; Bardelli, S. ; Bender, R. ; Biviano, A. ; Bodendorf, C. ; Bonino, D. ; Borgani, S. ; Boucaud, A. ; Bozzo, E. ; Branchini, E. ; Brescia, M. ; Burigana, C. ; Cabanac, R. ; Camera, S. ; Capobianco, V. ; Cappi, A. ; Carbone, C. ; Carretero, J. ; Carvalho, C. S. ; Casas, S. ; Castander, F. J. ; Castellano, M. ; Castignani, G. ; Cavuoti, S. ; Cimatti, A. ; Cledassou, R. ; Colodro-Conde, C. ; Congedo, G. ; Conversi, L. ; Copin, Y. ; Corcione, L. ; Costille, A. ; Coupon, J. ; Courtois, H. M. ; Cropper, M. ; Cuby, J. ; Da Silva, A. ; Degaudenzi, H. ; Di Ferdinando, D. ; Dubath, F. ; Duncan, C. ; Dupac, X. ; Dusini, S. ; Ealet, A. ; Fabricius, M. ; Farrens, S. ; Ferreira, P. G. ; Finelli, F. ; Fosalba, P. ; Fotopoulou, S. ; Franceschi, E. ; Franzetti, P. ; Galeotta, S. ; Garilli, B. ; Gillard, W. ; Gillis, B. ; Giocoli, C. ; Gozaliasl, G. ; Gracia-Carpio, J. ; Grupp, F. ; Guzzo, L. ; Haugan, S. V. H. ; Holmes, W. ; Hormuth, F. ; Jahnke, K. ; Keihanen, E. ; Kermiche, S. ; Kiessling, A. ; Kirkpatrick, C. C. ; Kunz, M. ; Kurki-Suonio, H. ; Ligori, S. ; Lilje, P. B. ; Lloro, I. ; Maino, D. ; Maiorano, E. ; Marggraf, O. ; Markovic, K. ; Marulli, F. ; Massey, R. ; Maturi, M. ; Mauri, N. ; Maurogordato, S. ; McCracken, H. J. ; Medinaceli, E. ; Mei, S. ; Metcalf, R. Benton ; Moresco, M. ; Morin, B. ; Moscardini, L. ; Munari, E. ; Nakajima, R. ; Neissner, C. ; Niemi, S. ; Nightingale, J. ; Padilla, C. ; Pasian, F. ; Patrizii, L. ; Pedersen, K. ; Pello, R. ; Pettorino, V. ; Pires, S. ; Polenta, G. ; Poncet, M. ; Popa, L. ; Potter, D. ; Pozzetti, L. ; Raison, F. ; Renzi, A. ; Rhodes, J. ; Riccio, G. ; Romelli, E. ; Roncarelli, M. ; Rossetti, E. ; Saglia, R. ; Sanchez, A. G. ; Sapone, D. ; Schneider, P. ; Schrabback, T. ; Scottez, V. ; Secroun, A. ; Seidel, G. ; Serrano, S. ; Sirignano, C. ; Sirri, G. ; Stanco, L. ; Sureau, F. ; Crespa, P. Tallada ; Tenti, M. ; Teplitz, H. I. ; Tereno, I. ; Toledo-Moreo, R. ; Torradeflot, F. ; Tramacere, A. ; Valentijn, E. A. ; Valenziano, L. ; Valiviita, J. ; Vassallo, T. ; Wang, Y. ; Welikala, N. ; Weller, J. ; Whittaker, L. ; Zacchei, A. ; Zamorani, G. ; Zoubian, J. ; Zucca, E.
Published in
Astronomy & Astrophysics
Volume
647
Pages
A117
Date
2021-03-18
ISSN
0004-6361
1432-0746
1432-0746
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Laboratories
LASTRO
Record Appears in
Scientific production and competences > SB - School of Basic Sciences > IPHYS - Institute of Physics > LASTRO - Laboratory of Astrophysics
Peer-reviewed publications
Work produced at EPFL
Journal Articles
Published
Peer-reviewed publications
Work produced at EPFL
Journal Articles
Published
Record creation date
2021-05-08