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欧几里得准备。XXVII。星系团两点关联函数的协方差模型验证

Euclid preparation. XXVII. Covariance model validation for the 2-point correlation function of galaxy clusters

Euclid Collaboration, A. Fumagalli, A. Saro, S. Borgani, T. Castro, M. Costanzi, P. Monaco, E. Munari, E. Sefusatti, N. Aghanim, N. Auricchio, M. Baldi, C. Bode… 展开作者

Euclid Collaboration, A. Fumagalli, A. Saro, S. Borgani, T. Castro, M. Costanzi, P. Monaco, E. Munari, E. Sefusatti, N. Aghanim, N. Auricchio, M. Baldi, C. Bodendorf, D. Bonino, E. Branchini, M. Brescia, J. Brinchmann, S. Camera, V. Capobianco, C. Carbone, J. Carretero, F. J. Castander, M. Castellano, S. Cavuoti, R. Cledassou, G. Congedo, C. J. Conselice, L. Conversi, Y. Copin, L. Corcione, F. Courbin, M. Cropper, A. Da Silva, H. Degaudenzi, F. Dubath, X. Dupac, S. Dusini, S. Farrens, S. Ferriol, M. Frailis, E. Franceschi, P. Franzetti, S. Galeotta, B. Garilli, W. Gillard, B. Gillis, C. Giocoli, A. Grazian, F. Grupp, S. V. H. Haugan, W. Holmes, A. Hornstrup, P. Hudelot, K. Jahnke, M. Kümmel, S. Kermiche, A. Kiessling, M. Kilbinger, T. Kitching, M. Kunz, H. Kurki-Suonio, S. Ligori, P. B. Lilje, I. Lloro, O. Mansutti, O. Marggraf, K. Markovic, F. Marulli, R. Massey, S. Maurogordato, E. Medinaceli, S. Mei, M. Meneghetti, G. Meylan, M. Moresco, L. Moscardini, S. -M. Niemi, C. Padilla, S. Paltani, F. Pasian, K. Pedersen, W. J. Percival, V. Pettorino, S. Pires, G. Polenta, M. Poncet, F. Raison, R. Rebolo-Lopez, A. Renzi, J. Rhodes, G. Riccio, E. Romelli, M. Roncarelli, R. Saglia, D. Sapone, B. Sartoris, P. Schneider, A. Secroun, G. Seidel, C. Sirignano, G. Sirri, L. Stanco, P. Tallada-Crespí, A. N. Taylor, I. Tereno, R. Toledo-Moreo, F. Torradeflot, I. Tutusaus, L. Valenziano, T. Vassallo, Y. Wang, J. Weller, A. Zacchei, G. Zamorani, J. Zoubian, S. Andreon, S. Bardelli, A. Boucaud, E. Bozzo, C. Colodro-Conde, D. Di Ferdinando, G. Fabbian, M. Farina, V. Lindholm, D. Maino, N. Mauri, C. Neissner, V. Scottez, E. Zucca, C. Baccigalupi, A. Balaguera-Antolínez, M. Ballardini, F. Bernardeau, A. Biviano, A. Blanchard, A. S Borlaff, C. Burigana, R. Cabanac, C. S. Carvalho, S. Casas, G. Castignani, K. Chambers, A. R. Cooray, J. Coupon, H. M. Courtois, S. Davini, S. de la Torre, G. Desprez, H. Dole, J. A. Escartin, S. Escoffier, P. G. Ferreira, F. Finelli, J. Garcia-Bellido, K. George, G. Gozaliasl, H. Hildebrandt, I. Hook, A. Jimenez Muňoz, B. Joachimi, V. Kansal, E. Keihänen, C. C. Kirkpatrick, A. Loureiro, M. Magliocchetti, R. Maoli, S. Marcin, M. Martinelli, N. Martinet, S. Matthew, M. Maturi, L. Maurin, R. B. Metcalf, G. Morgante, S. Nadathur, A. A. Nucita, L. Patrizii, J. E. Pollack, V. Popa, C. Porciani, D. Potter, A. Pourtsidou, M. Pöntinen, A. G. Sánchez, Z. Sakr, M. Schirmer, M. Sereno, A. Spurio Mancini, J. Stadel, J. Steinwagner, C. Valieri, J. Valiviita, A. Veropalumbo, M. Viel

摘要:

目的。我们验证了实空间星系团两点关联函数协方差的半解析模型。方法.使用1000个皮诺乔光锥模拟预期的欧几里得样本的星系团,我们校准一个简单的模型,以准确地描述聚类协方差。然后,我们使用这样一个模型来量化的协方差的变化的似然分析响应,并调查的影响,宇宙学相关的矩阵在统计水平上预期的欧几里得调查的星系团。结果我们发现,泊松散粒噪声的高斯模型不能正确地预测星系团的两点关联函数的协方差。通过引入一些额外的参数拟合模拟,该模型再现了数值协方差的10%的准确性,与宇宙学参数$Ω_{\rm m}$和$σ_8$的品质因数的差异约为5%。此外,我们发现协方差的宇宙学依赖性增加了不包含在平均值中的有价值的信息,显着提高了集群聚类的约束能力。最后,我们发现,宇宙学的优值可以进一步提高质量分仓考虑。我们的研究结果有显着的影响,推导宇宙学约束的2点聚类统计的欧几里德调查的星系团。

英文摘要:

Aims. We validate a semi-analytical model for the covariance of real-space 2-point correlation function of galaxy clusters. Methods. Using 1000 PINOCCHIO light cones mimicking the expected Euclid sample of galaxy clusters, we calibrate a simple model to accurately describe the clustering covariance. Then, we use such a model to quantify the likelihood analysis response to variations of the covariance, and investigate the impact of a cosmology-dependent matrix at the level of statistics expected for the Euclid survey of galaxy clusters. Results. We find that a Gaussian model with Poissonian shot-noise does not correctly predict the covariance of the 2-point correlation function of galaxy clusters. By introducing few additional parameters fitted from simulations, the proposed model reproduces the numerical covariance with 10 per cent accuracy, with differences of about 5 per cent on the figure of merit of the cosmological parameters $Ω_{\rm m}$ and $σ_8$. Also, we find that the cosmology-dependence of the covariance adds valuable information that is not contained in the mean value, significantly improving the constraining power of cluster clustering. Finally, we find that the cosmological figure of merit can be further improved by taking mass binning into account. Our results have significant implications for the derivation of cosmological constraints from the 2-point clustering statistics of the Euclid survey of galaxy clusters.

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