Euclid：用下一代巡天检验哥白尼原理
宇宙学与河外天体物理
2023-03-08 v2 广义相对论与量子宇宙学
摘要
哥白尼原理，即我们不在宇宙中特殊位置的观点，是现代宇宙学的基石之一，其违背将使 Friedmann-Lemaître-Robertson-Walker（FLRW）度规失效，并导致我们对宇宙理解的重大改变。因此，对该原理进行观测检验具有根本重要性。我们确定了未来巡天能够检验哥白尼原理的精度及其探测任何可能违背的能力。我们针对具有宇宙学常数 的非均匀 Lemaître-Tolman-Bondi 模型（LTB）给出约束预测，该模型基本上是宇宙学常数 与冷暗物质（CDM）模型，但赋予一个球形非均匀性。我们考虑当前可用数据与模拟 Euclid 数据的组合，以及基于 CDM 与 LTB 基准模型的外部数据产品。将这些约束与哥白尼原理的预期进行比较。当考虑 CDM 基准模型时，我们发现 Euclid 数据与其他当前及即将开展的巡天相结合，将把对哥白尼原理的约束改善约 ，具体有 的变化取决于所考虑的观测量与尺度。另一方面，当考虑 LTB 基准模型时，我们发现未来 Euclid 数据与其他当前及即将开展的数据集结合，将能探测对比度为 的 Gpc 尺度非均匀性。诸如 Euclid 的下一代巡天将在大尺度上彻底检验均匀性，收紧对哥白尼原理可能违背的约束。
引用
@article{arxiv.2207.09995,
title = {Euclid: Testing the Copernican principle with next-generation surveys},
author = {D. Camarena and V. Marra and Z. Sakr and S. Nesseris and A. Da Silva and J. Garcia-Bellido and P. Fleury and L. Lombriser and M. Martinelli and C. J. A. P. Martins and J. Mimoso and D. Sapone and C. Clarkson and S. Camera and C. Carbone and S. Casas and S. Ilić and V. Pettorino and I. Tutusaus and N. Aghanim and B. Altieri and A. Amara and N. Auricchio and M. Baldi and D. Bonino and E. Branchini and M. Brescia and J. Brinchmann and G. P. Candini and V. Capobianco and J. Carretero and M. Castellano and S. Cavuoti and A. Cimatti and R. Cledassou and G. Congedo and L. Conversi and Y. Copin and L. Corcione and F. Courbin and M. Cropper and H. Degaudenzi and F. Dubath and C. A. J. Duncan and X. Dupac and S. Dusini and A. Ealet and S. Farrens and P. Fosalba and M. Frailis and E. Franceschi and M. Fumana and B. Garilli and B. Gillis and C. Giocoli and A. Grazian and F. Grupp and S. V. H. Haugan and W. Holmes and F. Hormuth and A. Hornstrup and K. Jahnke and A. Kiessling and R. Kohley and M. Kunz and H. Kurki-Suonio and P. B. Lilje and I. Lloro and O. Mansutti and O. Marggraf and F. Marulli and R. Massey and M. Meneghetti and E. Merlin and G. Meylan and M. Moresco and L. Moscardini and E. Munari and S. M. Niemi and C. Padilla and S. Paltani and F. Pasian and K. Pedersen and G. Polenta and M. Poncet and L. Popa and L. Pozzetti and F. Raison and R. Rebolo and J. Rhodes and G. Riccio and Hans-Walter Rix and E. Rossetti and R. Saglia and B. Sartoris and A. Secroun and G. Seidel and C. Sirignano and G. Sirri and L. Stanco and C. Surace and P. Tallada-Crespí and A. N. Taylor and I. Tereno and R. Toledo-Moreo and F. Torradeflot and E. A. Valentijn and L. Valenziano and Y. Wang and G. Zamorani and J. Zoubian and S. Andreon and D. Di Ferdinando and V. Scottez and M. Tenti},
journal= {arXiv preprint arXiv:2207.09995},
year = {2023}
}
备注
15 pages, 5 figures, 3 tables, v2 reflects version accepted for publication in A&A