Data di Pubblicazione:
2021
Citazione:
Euclid: Forecasts for k-cut 3×2 Point Statistics / P.L. Taylor, T. Kitching, V.F. Cardone, A. Ferté, E.M. Huff, F. Bernardeau, J. Rhodes, A.C. Deshpande, I. Tutusaus, A. Pourtsidou, S. Camera, C. Carbone, S. Casas, M. Martinelli, V. Pettorino, Z. Sakr, D. Sapone, V. Yankelevich, N. Auricchio, A. Balestra, C. Bodendorf, D. Bonino, A. Boucaud, E. Branchini, M. Brescia, V. Capobianco, J. Carretero, M. Castellano, S. Cavuoti, A. Cimatti, R. Cledassou, G. Congedo, L. Conversi, L. Corcione, M. Cropper, E. Franceschi, B. Garilli, B. Gillis, C. Giocoli, L. Guzzo, S.V.H. Haugan, W. Holmes, F. Hormuth, K. Jahnke, S. Kermiche, M. Kilbinger, M. Kunz, H. Kurki-Suonio, S. Ligori, P.B. Lilje, I. Lloro, O. Marggraf, K. Markovic, R. Massey, S. Mei, E. Medinaceli, M. Meneghetti, G. Meylan, M. Moresco, B. Morin, L. Moscardini, S. Niemi, C. Padilla, F. Pasian, S. Paltani, K. Pedersen, S. Pires, W.J. Percival, G. Polenta, M. Poncet, L. Popa, F. Raison, M. Roncarelli, E. Rossetti, R. Saglia, P. Schneider, A. Secroun, G. Seidel, S. Serrano, C. Sirignano, G. Sirri, F. Sureau, P.T. Crespí, D. Tavagnacco, A.N. Taylor, H.I. Teplitz, I. Tereno, R. Toledo-Moreo, E.A. Valentijn, L. Valenziano, T. Vassallo, Y. Wang, J. Weller, A. Zacchei, J. Zoubian. - In: OPEN JOURNAL OF ASTROPHYSICS. - ISSN 2565-6120. - 4:1(2021 Jul 26), pp. 1-10. [10.21105/astro.2012.04672]
Abstract:
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 ` = 5000 and
a galaxy clustering and galaxy-galaxy lensing cut at ` = 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.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
euclid consortium; cosmological parameters; weak gravitational lensing; galaxy clustering statistics; euclid; cosmology;
Elenco autori:
P.L. Taylor, T. Kitching, V.F. Cardone, A. Ferté, E.M. Huff, F. Bernardeau, J. Rhodes, A.C. Deshpande, I. Tutusaus, A. Pourtsidou, S. Camera, C. Carbone, S. Casas, M. Martinelli, V. Pettorino, Z. Sakr, D. Sapone, V. Yankelevich, N. Auricchio, A. Balestra, C. Bodendorf, D. Bonino, A. Boucaud, E. Branchini, M. Brescia, V. Capobianco, J. Carretero, M. Castellano, S. Cavuoti, A. Cimatti, R. Cledassou, G. Congedo, L. Conversi, L. Corcione, M. Cropper, E. Franceschi, B. Garilli, B. Gillis, C. Giocoli, L. Guzzo, S.V.H. Haugan, W. Holmes, F. Hormuth, K. Jahnke, S. Kermiche, M. Kilbinger, M. Kunz, H. Kurki-Suonio, S. Ligori, P.B. Lilje, I. Lloro, O. Marggraf, K. Markovic, R. Massey, S. Mei, E. Medinaceli, M. Meneghetti, G. Meylan, M. Moresco, B. Morin, L. Moscardini, S. Niemi, C. Padilla, F. Pasian, S. Paltani, K. Pedersen, S. Pires, W.J. Percival, G. Polenta, M. Poncet, L. Popa, F. Raison, M. Roncarelli, E. Rossetti, R. Saglia, P. Schneider, A. Secroun, G. Seidel, S. Serrano, C. Sirignano, G. Sirri, F. Sureau, P.T. Crespí, D. Tavagnacco, A.N. Taylor, H.I. Teplitz, I. Tereno, R. Toledo-Moreo, E.A. Valentijn, L. Valenziano, T. Vassallo, Y. Wang, J. Weller, A. Zacchei, J. Zoubian
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