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Euclid: Forecasts for k-cut 3×2 Point Statistics

Taylor, L. and Kitching, T. and Cardone, V. F. and Ferté, A. and Huff, E. M. and Bernardeau, F. and Rhodes, J. and Deshpande, A. C. and Tutusaus, I. and Pourtsidou, Alkistis and Camera, S. and Carbone, C. and Casas, S. and Martinelli, M. and Pettorino, V. and Sakr, Z. and Sapone, D. and Yankelevich, V. and Auricchio, N. and Balestra, A. and Bodendorf, C. and Bonino, D. and Boucaud, A. and Branchini, Enzo and Brescia, M. and Capobianco, V. and Carretero, J. and Castellano, M. and Cavuoti, S. and Cimatti, A. and Cledassou, R. and Congedo, G. and Conversi, L. and Corcione, L. and Cropper, Mark and Franceschi, E. and Garilli, B. and Gillis, B. and Giocoli, C. and Guzzo, L. and Haugan, S. V. H. and Holmes, W. and Hormuth, F. and Jahnke, Knud and Kermiche, S. and Kilbinger, M. and Kunz, M. and Kurki-Suonio, H. and Ligori, S. and Lilje, Per B. and Lloro, I. and Marggraf, O. and Markovic, K. and Massey, R. and Mei, S. and Medinaceli, E. and Meneghetti, M. and Meylan, G. and Moresco, M. and Morin, B. and Moscardini, Lauro and Niemi, S. and Padilla, C. and Pasian, F. and Paltani, S. and Pedersen, K. and Pires, S. and Percival, Will J. and Polenta, G. and Poncet, M. and Popa, L. and Raison, F. and Roncarelli, M. and Rossetti, E. and Saglia, R. and Schneider, Peter and Secroun, A. and Seidel, G. and Serrano, S. and Sirignano, C. and Sirri, G. and Sureau, F. and Tallada Crespí, P. and Tavagnacco, D. and Taylor, A. N. and Teplitz, H. I. and Tereno, I. and Toledo-Moreo, R. and Valentijn, E. A. and Valenziano, L. and Vassallo, T. and Wang, Yun and Weller, Jochen and Zacchei, A. and Zoubian, J. (2021) Euclid: Forecasts for k-cut 3×2 Point Statistics. Open Journal of Astrophysics, 4 . Art. No. astro.2012.04672. ISSN 2565-6120. doi:10.21105/astro.2012.04672.

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Modelling uncertainties at small scales, i.e. high k in the power spectrum P(k), due to baryonic feedback, nonlinear structure growth and the fact that galaxies are biased tracers poses a significant obstacle to fully leverage the constraining power of the Euclid wide-field survey. k-cut cosmic shear has recently been proposed as a method to optimally remove sensitivity to these scales while preserving usable information. In this paper we generalise the k-cut cosmic shear formalism to 3×2 point statistics and estimate the loss of information for different k-cuts in a 3×2 point analysis of the Euclid data. Extending the Fisher matrix analysis of Euclid Collaboration: Blanchard et al. (2019), we assess the degradation in constraining power for different k-cuts. We work in the idealised case and assume the galaxy bias is linear, the covariance is Gaussian, while neglecting uncertainties due to photo-z errors and baryonic feedback. We find that taking a k-cut at 2.6 h Mpc⁻¹ yields a dark energy Figure of Merit (FOM) of 1018. This is comparable to taking a weak lensing cut at ℓ=5000 and a galaxy clustering and galaxy-galaxy lensing cut at ℓ=3000 in a traditional 3×2 point analysis. We also find that the fraction of the observed galaxies used in the photometric clustering part of the analysis is one of the main drivers of the FOM. Removing 50% (90%) of the clustering galaxies decreases the FOM by 19% (62%). Given that the FOM depends so heavily on the fraction of galaxies used in the clustering analysis, extensive efforts should be made to handle the real-world systematics present when extending the analysis beyond the luminous red galaxy (LRG) sample.

Item Type:Article
Related URLs:
URLURL TypeDescription
Kitching, T.0000-0002-4061-4598
Ferté, A.0000-0003-3065-9941
Huff, E. M.0000-0002-9378-3424
Rhodes, J.0000-0002-4485-8549
Deshpande, A. C.0000-0003-3721-4232
Tutusaus, I.0000-0002-3199-0399
Camera, S.0000-0003-3399-3574
Carbone, C.0000-0003-0125-3563
Pettorino, V.0000-0002-4203-9320
Sapone, D.0000-0001-7089-4503
Auricchio, N.0000-0003-4444-8651
Balestra, A.0000-0002-6967-261X
Bonino, D.0000-0002-3336-9977
Boucaud, A.0000-0001-7387-2633
Brescia, M.0000-0001-9506-5680
Capobianco, V.0000-0002-3309-7692
Carretero, J.0000-0002-3130-0204
Castellano, M.0000-0001-9875-8263
Cavuoti, S.0000-0002-3787-4196
Cimatti, A.0000-0002-4409-5633
Cledassou, R.0000-0002-8313-2230
Congedo, G.0000-0003-2508-0046
Conversi, L.0000-0002-6710-8476
Corcione, L.0000-0002-6497-5881
Franceschi, E.0000-0002-0585-6591
Garilli, B.0000-0001-7455-8750
Gillis, B.0000-0002-4478-1270
Giocoli, C.0000-0002-9590-7961
Jahnke, Knud0000-0003-3804-2137
Kermiche, S.0000-0002-0302-5735
Kilbinger, M.0000-0001-9513-7138
Kunz, M.0000-0003-1676-6126
Kurki-Suonio, H.0000-0002-4618-3063
Ligori, S.0000-0003-4172-4606
Lloro, I.0000-0001-5966-1434
Marggraf, O.0000-0001-7242-3852
Massey, R.0000-0002-6085-3780
Mei, S.0000-0002-2849-559X
Medinaceli, E.0000-0002-4040-7783
Meneghetti, M.0000-0003-1225-7084
Moresco, M.0000-0002-7616-7136
Padilla, C.0000-0001-7951-0166
Paltani, S.0000-0002-8108-9179
Pires, S.0000-0002-0249-2104
Percival, Will J.0000-0002-0644-5727
Polenta, G.0000-0003-4067-9196
Raison, F.0000-0002-7819-6918
Roncarelli, M.0000-0001-9587-7822
Saglia, R.0000-0003-0378-7032
Secroun, A.0000-0003-0505-3710
Seidel, G.0000-0003-2907-353X
Serrano, S.0000-0002-0211-2861
Teplitz, H. I.0000-0002-7064-5424
Tereno, I.0000-0002-4537-6218
Toledo-Moreo, R.0000-0002-2997-4859
Valentijn, E. A.0000-0003-1032-6680
Valenziano, L.0000-0002-1170-0104
Wang, Yun0000-0002-4749-2984
Zacchei, A.0000-0003-0396-1192
Additional Information:CCBY-4.0. The authors would like to thank Shahab Joudaki for carefully reviewing an earlier version of the paper. We thank the two anonymous referees whose comments have significantly improved the manuscript. PLT acknowledges support for this work from a NASA Postdoctoral Program Fellowship. Part of the research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. TDK acknowledges funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 776247. ACD acknowledges funding from the Royal Society. The authors acknowledge support from NASA ROSES grant 12-EUCLID12-0004. AP is a UK Research and Innovation Future Leaders Fellow, grant MR/S016066/1. The authors acknowledge the Euclid Collaboration, the European Space Agency, and a number of agencies and institutes that have supported the development of Euclid, in particular the Academy of Finland, the Agenzia Spaziale Italiana, the Belgian Science Policy, the Canadian Euclid Consortium, the Centre National d’Etudes Spatiales, the Deutsches Zentrum für Luft- und Raumfahrt, the Danish Space Research Institute, the Fundaçao para a Ciência e a Tecnologia, the Ministerio de Economia y Competitividad, the National Aeronautics and Space Administration, the Netherlandse Onderzoekschool Voor Astronomie, the Norwegian Space Agency, the Romanian Space Agency, the State Secretariat for Education, Research and Innovation (SERI) at the Swiss Space Office (SSO), and the United Kingdom Space Agency. A complete and detailed list is available on the Euclid web site (
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
NASA Postdoctoral ProgramUNSPECIFIED
European Research Council (ERC)776247
UK Research and InnovationMR/S016066/1
Euclid ConsortiumUNSPECIFIED
European Space Agency (ESA)UNSPECIFIED
Academy of FinlandUNSPECIFIED
Agenzia Spaziale Italiana (ASI)UNSPECIFIED
Belgian Federal Science Policy Office (BELSPO)UNSPECIFIED
Canadian Euclid ConsortiumUNSPECIFIED
Centre National de la Recherche Scientifique (CNRS)UNSPECIFIED
Deutsches Zentrum für Luft- und Raumfahrt (DLR)UNSPECIFIED
Danish Space Research InstituteUNSPECIFIED
Fundação para a Ciência e a Tecnologia (FCT)UNSPECIFIED
Ministerio de Economía y Competitividad (MINECO)UNSPECIFIED
Nederlandse Onderzoekschool voor de Astronomie (NOVA)UNSPECIFIED
Norwegian Space AgencyUNSPECIFIED
Romanian Space AgencyUNSPECIFIED
Swiss Space Office (SSO)UNSPECIFIED
United Kingdom Space Agency (UKSA)UNSPECIFIED
Record Number:CaltechAUTHORS:20221026-869242000.1
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:117579
Deposited By: George Porter
Deposited On:26 Oct 2022 16:33
Last Modified:27 Oct 2022 21:43

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