Euclid 准备工作：Euclid 光谱与测光数据集的 6x2 pt 分析
宇宙学与河外天体物理
2024-09-30 v1
摘要
我们给出了 Euclid 6x2pt 统计量的宇宙学参数预测，该统计量包括星系团聚类和弱引力透镜主要探针，以及此前被忽略的成像/测光数据与光谱数据之间的交叉协方差和交叉相关信号。其目的是理解这些项对 Euclid 性能的影响。我们考虑两种不同的技术来生成 6x2pt 宇宙学预测：即所谓的调和（harmonic）方法和混合（hybrid）方法。在第一种方法中，我们以相同的方式处理所有不同的 Euclid 探针，即对于光谱和测光团聚类以及弱引力透镜，我们仅考虑角 2pt 统计量，并在球谐域中分析它们所有可能的交叉协方差和交叉相关性。在第二种方法中，我们不考虑 3D 和 2D 数据之间可忽略的交叉协方差，但考虑它们的交叉相关与自相关信号的组合。我们发现，交叉协方差和交叉相关信号对宇宙学参数约束的影响可以忽略不计，因此对 Euclid 性能的影响也可以忽略不计。在混合方法的情况下，我们将这一结果归因于弱引力透镜与测光数据之间的交叉相关效应，该效应相对于其他交叉相关信号占主导地位。在 2D 调和方法的情况下，我们将这一结果归因于本工作根据官方 Euclid 预测所实现的 2D 投影统计量的两个主要理论局限性：高散粒噪声和光谱样本有限的红移范围，以及来自红移空间畸变和透镜放大等次级项的径向信息丢失。我们的分析表明，2D 和 3D Euclid 数据可以被安全地视为独立的，从而大大节省计算资源。
引用
@article{arxiv.2409.18882,
title = {Euclid preparation: 6x2 pt analysis of Euclid's spectroscopic and photometric data sets},
author = {Euclid Collaboration and L. Paganin and M. Bonici and C. Carbone and S. Camera and I. Tutusaus and S. Davini and J. Bel and S. Tosi and D. Sciotti and S. Di Domizio and I. Risso and G. Testera and D. Sapone and Z. Sakr and A. Amara and S. Andreon and N. Auricchio and C. Baccigalupi and M. Baldi and S. Bardelli and P. Battaglia and R. Bender and F. Bernardeau and C. Bodendorf and D. Bonino and E. Branchini and M. Brescia and J. Brinchmann and V. Capobianco and V. F. Cardone and J. Carretero and S. Casas and M. Castellano and G. Castignani and S. Cavuoti and A. Cimatti and C. Colodro-Conde and G. Congedo and C. J. Conselice and L. Conversi and Y. Copin and L. Corcione and A. Costille and F. Courbin and H. M. Courtois and M. Crocce and M. Cropper and A. Da Silva and H. Degaudenzi and G. De Lucia and A. M. Di Giorgio and J. Dinis and F. Dubath and C. A. J. Duncan and X. Dupac and S. Dusini and A. Ealet and M. Farina and S. Farrens and S. Ferriol and M. Frailis and E. Franceschi and S. Galeotta and B. Garilli and K. George and W. Gillard and B. Gillis and C. Giocoli and A. Grazian and F. Grupp and L. Guzzo and S. V. H. Haugan and W. Holmes and I. Hook and F. Hormuth and A. Hornstrup and S. Ilić and K. Jahnke and B. Joachimi and E. Keihänen and S. Kermiche and A. Kiessling and M. Kilbinger and T. Kitching and B. Kubik and M. Kümmel and M. Kunz and H. Kurki-Suonio and S. Ligori and P. B. Lilje and V. Lindholm and I. Lloro and G. Mainetti and D. Maino and E. Maiorano and O. Mansutti and O. Marggraf and K. Markovic and M. Martinelli and N. Martinet and F. Marulli and R. Massey and H. J. McCracken and E. Medinaceli and S. Mei and Y. Mellier and M. Meneghetti and E. Merlin and G. Meylan and M. Moresco and L. Moscardini and E. Munari and S. -M. Niemi and J. W. Nightingale and C. Padilla and S. Paltani and F. Pasian and K. Pedersen and W. J. Percival and V. Pettorino and S. Pires and G. Polenta and M. Poncet and L. A. Popa and L. Pozzetti and F. Raison and R. Rebolo and A. Renzi and J. Rhodes and G. Riccio and E. Romelli and M. Roncarelli and E. Rossetti and R. Saglia and B. Sartoris and P. Schneider and T. Schrabback and M. Scodeggio and A. Secroun and G. Seidel and S. Serrano and C. Sirignano and G. Sirri and L. Stanco and J. -L. Starck and J. Steinwagner and C. Surace and P. Tallada-Crespí and D. Tavagnacco and A. N. Taylor and I. Tereno and R. Toledo-Moreo and F. Torradeflot and E. A. Valentijn and L. Valenziano and T. Vassallo and A. Veropalumbo and Y. Wang and J. Weller and A. Zacchei and G. Zamorani and J. Zoubian and E. Zucca and A. Biviano and A. Boucaud and E. Bozzo and C. Burigana and M. Calabrese and D. Di Ferdinando and G. Fabbian and R. Farinelli and J. Graciá-Carpio and N. Mauri and V. Scottez and M. Tenti and M. Viel and M. Wiesmann and Y. Akrami and V. Allevato and S. Anselmi and M. Ballardini and A. Blanchard and S. Borgani and S. Bruton and R. Cabanac and A. Calabro and A. Cappi and C. S. Carvalho and T. Castro and G. Cañas-Herrera and K. C. Chambers and S. Contarini and A. R. Cooray and J. Coupon and G. Desprez and H. Dole and A. Díaz-Sánchez and J. A. Escartin Vigo and S. Escoffier and P. G. Ferreira and I. Ferrero and F. Finelli and F. Fornari and L. Gabarra and K. Ganga and J. García-Bellido and E. Gaztanaga and F. Giacomini and G. Gozaliasl and A. Gregorio and A. Hall and H. Hildebrandt and J. Hjorth and J. J. E. Kajava and V. Kansal and D. Karagiannis and C. C. Kirkpatrick and L. Legrand and A. Loureiro and J. Macias-Perez and G. Maggio and M. Magliocchetti and F. Mannucci and R. Maoli and C. J. A. P. Martins and S. Matthew and L. Maurin and R. B. Metcalf and M. Migliaccio and P. Monaco and G. Morgante and S. Nadathur and L. Patrizii and A. Pezzotta and V. Popa and C. Porciani and D. Potter and M. Pöntinen and P. -F. Rocci and M. Sahlén and A. Schneider and M. Schultheis and M. Sereno and C. Tao and N. Tessore and R. Teyssier and S. Toft and A. Troja and M. Tucci and C. Valieri and J. Valiviita and D. Vergani and G. Verza and P. Vielzeuf},
journal= {arXiv preprint arXiv:2409.18882},
year = {2024}
}
备注
32 pages, 20 figures. Comments are welcome