Euclid：原初非高斯性和宇宙初始条件的场级推断
宇宙学与河外天体物理
2024-12-17 v1
摘要
Euclid空间任务的一个主要目标是通过搜索与原初高斯随机场的偏差来约束早期宇宙物理学。显著检测到原初非高斯性将排除最简单的宇宙暴胀模型，并改变我们对宇宙起源的理解。本文预测了在即将到来的Euclid数据中，场级推断星系红移巡天在贝叶斯分层框架内约束局域原初非高斯性振幅（）的能力。我们设计并模拟了模拟数据集，并使用全场前向建模方法进行马尔可夫链蒙特卡洛分析。通过将宇宙物质场的形成历史纳入分析，该方法考虑了所有可用的原初非高斯性探针，并超越了的统计汇总估计量。探针包括例如两点和高阶统计量、本征速度场和尺度依赖的星系偏差。此外，该方法同时处理系统性的巡天效应，如选择效应、巡天几何和星系偏差。预测显示，该方法使用Euclid数据可以达到（68.3%置信区间，网格分辨率Mpc）的精度水平。我们还提供了数据产品，包括具有非零值的真实体模拟和绝热曲率涨落图。结果强调了场级推断在星系红移巡天中约束的可行性和优势。我们的方法一致地捕获了大尺度结构中所有可用于约束的信息，并解决了早期宇宙物理学与晚期引力效应之间的简并，同时减轻了系统和观测效应的影响。
引用
@article{arxiv.2412.11945,
title = {Euclid: Field-level inference of primordial non-Gaussianity and cosmic initial conditions},
author = {A. Andrews and J. Jasche and G. Lavaux and F. Leclercq and F. Finelli and Y. Akrami and M. Ballardini and D. Karagiannis and J. Valiviita and N. Bartolo and G. Cañas-Herrera and S. Casas and B. R. Granett and F. Pace and D. Paoletti and N. Porqueres and Z. Sakr and D. Sapone and N. Aghanim and A. Amara and S. Andreon and C. Baccigalupi and M. Baldi and S. Bardelli and D. Bonino and E. Branchini and M. Brescia and J. Brinchmann and S. Camera and V. Capobianco and C. Carbone and J. Carretero 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 F. Courbin and H. M. Courtois 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 M. Farina and S. Farrens and F. Faustini and S. Ferriol and M. Frailis and E. Franceschi and S. Galeotta and B. Gillis and C. Giocoli and P. Gómez-Alvarez and A. Grazian and F. Grupp and S. V. H. Haugan and W. Holmes and F. Hormuth and A. Hornstrup and P. Hudelot and S. Ilić and K. Jahnke and M. Jhabvala and B. Joachimi and E. Keihänen and S. Kermiche and A. Kiessling and B. Kubik and M. Kunz and H. Kurki-Suonio and S. Ligori and P. B. Lilje and V. Lindholm and I. Lloro 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 E. Medinaceli and S. Mei and Y. Mellier and M. Meneghetti and E. Merlin and G. Meylan and M. Moresco and L. Moscardini and C. Neissner and S. -M. Niemi and J. W. Nightingale and C. Padilla and S. Paltani and F. Pasian and K. Pedersen 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 R. Saglia and A. G. Sánchez and B. Sartoris and M. Schirmer and P. Schneider and T. Schrabback and A. Secroun and E. Sefusatti and S. Serrano and C. Sirignano and G. Sirri and L. Stanco and J. Steinwagner and P. Tallada-Crespí and A. N. Taylor and I. Tereno and R. Toledo-Moreo and F. Torradeflot and I. Tutusaus and L. Valenziano and T. Vassallo and G. Verdoes Kleijn and A. Veropalumbo and Y. Wang and J. Weller and G. Zamorani and E. Zucca and C. Burigana and V. Scottez and A. Spurio Mancini and M. Viel},
journal= {arXiv preprint arXiv:2412.11945},
year = {2024}
}
备注
31 pages and 26 figures, 3 tables. Comments are welcome!