preparation

We compared the performance of the flat-sky approximation and Limber approximation for the clustering analysis of the photometric galaxy catalogue of Euclid. We studied a 6-bin configuration, representing the first data release (DR1), and a 13-bin configuration, representing the third and final data release (DR3). We find that the Limber approximation is sufficiently accurate for the analysis of the wide bins of DR1. Instead, the 13 bins of DR3 cannot be modelled accurately with the Limber approximation. Instead, the flat-sky approximation is accurate to below 5% in recovering the angular power spectra of galaxy number counts in both cases and can be used to simplify the computation of the full power spectrum in harmonic space for the data analysis of DR3.

Authors

Publication Details

Journal
Springer Link (Chiba Institute of Technology)
Published
2026-03-17
DOI
https://doi.org/10.1051/0004-6361/202557773/pdf
Primary Topic
Galaxies: Formation, Evolution, Phenomena
Type
article
Field-Weighted Citation Impact
0.00
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article

preparation

Diego Jm, R.J. Massey, V.F. CARDONE, A.R. Cooray et al.
Springer Link (Chiba Institute of Technology)
Galaxies: Formation, Evolution, Phenomena
article

preparation

Diego Jm, R.J. Massey, V.F. CARDONE, A.R. Cooray, I.T Andika, J.E. Kajava, G.F Lesci, W.L. Matthewson, P.B. Lilje, J. García-Bellido, P. Simon, S. Serrano, E. Maiorano, E. Medinaceli, H. Hildebrandt, B. Gillis, T. Vassallo, H. Degaudenzi, K. Jahnke, S. Quai, S. Camera, D. Vergani, S. Bruton, L. Valenziano, S.-M. Niemi, J. Martín-Fleitas, C. Giocoli, S. Andreon, A.G. Ferrari, J. Gracia-Carpio, A. Enia, K. George, M. Tenti, E. Branchini, S. Ferriol, R. Toledo-Moreo, D. Paoletti, F. Dubath, J.-L. Starck, H. Dole, S. Nadathur, S.V.H. Haugan, L. Gabarra, W.J. Percival, D. Di Ferdinando, S. Pires, A. Pisani, Z. Sakr, F. Courbin, S. Anselmi, A. Mora, M. Frailis, L. Legrand, E. Zucca, D. Potter, Y. Wang, J. Kim, S. Bardelli, G. Gozaliasl, N. Martinet, M. Sahlén, I. Risso, A. Calabro, G. Castignani, S. Alvi, S. Davini, G. Verza, S. Cavuoti, L. Maurin, G. Morgante, F. Vernizzi, J. Weller, G. Congedo, A.M.C. Le Brun, K. Tanidis, O. Marggraf, G. Seidel, A. Cimatti, A. Veropalumbo, M. Miluzio, A. Díaz-Sánchez, Y. Fang, J. Lesgourgues, S. Hemmati, M. Fumana, C.A.J. Duncan, S. Mei, C. Porciani, C.J. Conselice, A.N. Taylor, F. Torradeflot, S. Dusini, N.A. Walton, S. Marcin, A. Silvestri, F. Lepori, I. Tutusaus, F. Finelli, C. Kirkpatrick, J. Steinwagner, M. Farina, A. Renzi, L. Moscardini, J. Valiviita, C. Baccigalupi, E. Romelli, B. Altieri, B. Joachimi, V. Scottez, A. Hornstrup, F. Cogato, D. Sciotti, H.M. Courtois, F. Pasian, G. Sirri, A. Cappi, J. Le Graet, A. Pezzotta, S. Escoffier, M. Maturi, A. Secroun, M. Magliocchetti, F. Lacasa, M.L. Brown, R. Saglia, K. Pedersen, C. Carbone, F. Raison, E. Sellentin, E. Sefusatti, G. Meylan, F. Marulli, G. Polenta, M. Castellano, B. Morin, B. Kubik, C. Tao, F. Faustini, S. Galeotta, B. Camacho Quevedo, S. Matthew, M. Kunz, L.C. Smith, V. Pettorino, F. Giacomini, I. Lloro, C. Neissner, J. Rhodes, K. Naidoo, M. Meneghetti, A. Spurio Mancini, J. Hjorth, E. Keihänen, Y. Kang, M. Bethermin, W.G. Hartley, K. Paterson, B. Sartoris, M. Calabrese, M. Wiesmann, A. Troja, X. Dupac, F. Gianotti, J. Carretero, J. Macias-Perez, S. Kruk, M. Viel, S. Casas, A. Franco, V. Kansal, C. Moretti, A. Da Silva, D. Sapone, R. Maoli, S. Sacquegna, M. Martinelli, I. Tereno, G. Leroy, N. Mauri, W. Holmes, F. Caro, E. Merlin, S. Toft, Y. Akrami, G. Maggio, M. Brescia, L.A. Popa, N. Tessore, D. Maino, F. Grupp, S. Ligori, P. Monaco, A. Venhola, G. Testera, M. Baldi, C.J.A.P. Martins, R. Cabanac, S. Di Domizio, M. Bonici, L. Patrizii, C. Valieri, M.Y. Elkhashab, R. Rebolo, M. Radovich, E. Sarpa, Y. Copin, J.A. Escartin Vigo, E. Bozzo, G. De Lucia, J. Diaz, C. Colodro-Conde, V. Capobianco, R. Teyssier, T.I. Liaudat, S. Tosi, M. Sereno, C. Sirignano, G. Desprez, A. Navarro-Alsina, M. Lattanzi, M. Ballardini, S. Borgani, M. Jhabvala, Y. Mellier, O. Mansutti, R. Durrer, M. Tucci, T. Gasparetto, A.G. Sánchez, A. Schneider, M. Roncarelli, A. Biviano, V. Gautard, H. Kurki-Suonio, A. Finoguenov, S. Paltani, M. Moresco, G. Zamorani, C. Padilla, S. Conseil, K. Kiiveri, F. Atrio-Barandela, C.M. Gutierrez, A. Grazian, E. Franceschi, M. Lembo, K. Ganga, C.S. Carvalho, A. Amara, C. Burigana, D. Bertacca, G. Cañas-Herrera, D. Karagiannis, F. Passalacqua, T. Schrabback, K.C. Chambers, P. Battaglia, N. Auricchio, R.B. Metcalf, D.B. Sanders, P. Tallada-Crespí, M. Pöntinen, M. Archidiacono, V. Lindholm, L. Stanco, C. Hernández-Monteagudo, P. Schneider, T. Castro, G. Mainetti, L. Conversi, S. Kermiche, G. Riccio, M. Poncet, E. Gaztanaga, G. Rodighiero, L. Blot, F. Hormuth, A. Kiessling, S. Nesseris
article en

Abstract

We compared the performance of the flat-sky approximation and Limber approximation for the clustering analysis of the photometric galaxy catalogue of Euclid. We studied a 6-bin configuration, representing the first data release (DR1), and a 13-bin configuration, representing the third and final data release (DR3). We find that the Limber approximation is sufficiently accurate for the analysis of the wide bins of DR1. Instead, the 13 bins of DR3 cannot be modelled accurately with the Limber approximation. Instead, the flat-sky approximation is accurate to below 5% in recovering the angular power spectra of galaxy number counts in both cases and can be used to simplify the computation of the full power spectrum in harmonic space for the data analysis of DR3.

Springer Link (Chiba Institute of Technology)
Openalex Percentile: Top 53%
Galaxies: Formation, Evolution, Phenomena
DOISourceOpenAlex
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