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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/32265
Title: Euclid preparation: IX. EuclidEmulator2 - power spectrum emulation with massive neutrinos and self-consistent dark energy perturbations
Authors: Euclid Collaboration
Knabenhans, M.
Stadel, J.
Potter, D.
Dakin, J.
Hannestad, S.
Tram, T.
Marelli, S.
Schneider, A.
Teyssier, R.
Fosalba, P.
Pires, S.
Polenta, G.
Poncet, M.
Raison, F.
Renzi, A.
Rhodes, J.
RICCIO, GIUSEPPE 
Romelli, Erik 
Roncarelli, M.
Saglia, R.
ANDREON, Stefano 
Sánchez, A. G.
Sapone, D.
Schneider, P.
Scottez, V.
Secroun, A.
Serrano, S.
Sirignano, C.
Sirri, G.
Stanco, L.
Sureau, F.
AURICCHIO, NATALIA 
Tallada Crespí, P.
Taylor, A. N.
Tenti, M.
Tereno, I.
Toledo-Moreo, R.
Torradeflot, F.
VALENZIANO, LUCA 
Valiviita, J.
Vassallo, T.
VIEL, MATTEO 
Baccigalupi, C.
Wang, Y.
Welikala, N.
Whittaker, L.
ZACCHEI, Andrea 
ZUCCA, Elena 
Balaguera-Antolínez, A.
Baldi, M.
BARDELLI, Sandro 
BATTAGLIA, PAOLA MARIA 
Bender, R.
BIVIANO, ANDREA 
Bodendorf, C.
Bozzo, E.
Branchini, Enzo 
BRESCIA, Massimo 
BURIGANA, CARLO 
Cabanac, R.
Camera, S.
Capobianco, Vito 
CAPPI, Alberto 
CARBONE, Carmelita 
Carretero, J.
Carvalho, C. S.
Casas, R.
Casas, S.
CASTELLANO, MARCO 
Castignani, G.
CAVUOTI, STEFANO 
Cledassou, R.
Colodro-Conde, C.
Congedo, G.
Conselice, C. J.
Conversi, L.
Copin, Y.
CORCIONE, Leonardo 
Coupon, J.
Courtois, H. M.
Da Silva, A.
de la Torre, S.
Di Ferdinando, D.
Duncan, C. A. J.
Dupac, X.
Fabbian, G.
Farrens, S.
Ferreira, P. G.
FINELLI, FABIO 
FRAILIS, Marco 
FRANCESCHI, ENRICO 
GALEOTTA, Samuele 
GARILLI, BIANCA MARIA ROSA 
GIOCOLI, Carlo 
Gozaliasl, G.
Graciá-Carpio, J.
Grupp, F.
Guzzo, L.
Holmes, W.
Hormuth, F.
Israel, H.
Jahnke, K.
Keihanen, E.
Kermiche, S.
Kirkpatrick, C. C.
Kubik, B.
Kunz, M.
Kurki-Suonio, H.
LIGORI, Sebastiano 
Lilje, P. B.
Lloro, I.
Maino, D.
Marggraf, O.
Markovic, K.
Martinet, N.
Marulli, F.
Massey, R.
Mauri, N.
Maurogordato, S.
Medinaceli, E.
MENEGHETTI, MASSIMO 
Metcalf, B.
Meylan, G.
Moresco, M.
Morin, B.
Moscardini, L.
Munari, Emiliano 
Neissner, C.
Niemi, S. M.
Padilla, C.
Paltani, S.
Pasian, F.
Patrizii, L.
Pettorino, V.
Issue Date: 2021
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 
Number: 505
Issue: 2
First Page: 2840
Abstract: We present a new, updated version of the EuclidEmulator (called EuclidEmulator2), a fast and accurate predictor for the nonlinear correction of the matter power spectrum. 2 per cent level accurate emulation is now supported in the eight-dimensional parameter space of w<SUB>0</SUB>w<SUB>a</SUB>CDM+∑m<SUB>ν</SUB> models between redshift z = 0 and z = 3 for spatial scales within the range $0.01 \, h\, {\rm Mpc}^{-1}\le k \le 10\, h\, {\rm Mpc}^{-1}$. In order to achieve this level of accuracy, we have had to improve the quality of the underlying N-body simulations used as training data: (i) we use self-consistent linear evolution of non-dark matter species such as massive neutrinos, photons, dark energy, and the metric field, (ii) we perform the simulations in the so-called N-body gauge, which allows one to interpret the results in the framework of general relativity, (iii) we run over 250 high-resolution simulations with 3000<SUP>3</SUP> particles in boxes of 1(h<SUP>-1</SUP> Gpc)<SUP>3</SUP> volumes based on paired-and-fixed initial conditions, and (iv) we provide a resolution correction that can be applied to emulated results as a post-processing step in order to drastically reduce systematic biases on small scales due to residual resolution effects in the simulations. We find that the inclusion of the dynamical dark energy parameter w<SUB>a</SUB> significantly increases the complexity and expense of creating the emulator. The high fidelity of EuclidEmulator2 is tested in various comparisons against N-body simulations as well as alternative fast predictors such as HALOFIT, HMCode, and CosmicEmu. A blind test is successfully performed against the Euclid Flagship v2.0 simulation. Nonlinear correction factors emulated with EuclidEmulator2 are accurate at the level of $1{{\ \rm per\ cent}}$ or better for $0.01 \, h\, {\rm Mpc}^{-1}\le k \le 10\, h\, {\rm Mpc}^{-1}$ and z ≤ 3 compared to high-resolution dark-matter-only simulations. EuclidEmulator2 is publicly available at https://github.com/miknab/EuclidEmulator2.
URI: http://hdl.handle.net/20.500.12386/32265
URL: http://arxiv.org/abs/2010.11288v1
https://academic.oup.com/mnras/article/505/2/2840/6275725?login=true
ISSN: 0035-8711
DOI: 10.1093/mnras/stab1366
Bibcode ADS: 2021MNRAS.505.2840E
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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