Euclid: 两点相关函数偶极子中的相对论效应
宇宙学与河外天体物理
2025-06-12 v2
摘要
当交叉关联两个星系群或两个不同示踪物时，引力红移和多普勒效应会产生星系相关函数的反对称分量。在本文中，我们评估了在 Euclid 光谱巡天中探测这些效应的可能性。我们使用宿主暗晕的 Navarro-Frenk-White 轮廓，对 Flagship 模拟星表中星系观测红移的引力红移影响进行了建模。我们通过将星系星表分为暗弱和明亮两个群，并在四个红移区间内估计它们交叉相关的偶极子，来分离这些在标准分析中很大程度上占次要地位的相对论效应。在模拟星表中，我们在 以下的尺度上探测到了偶极子信号，在最低的两个红移区间内，探测显著性分别为 和 。在更高红移处，探测显著性降至 以下。总体而言，我们估计在 Euclid 光谱样本中的总探测显著性约为 。我们发现，在小尺度上，信号的主要贡献来自非线性引力势。我们在 Flagship 模拟星表上的研究表明，该可观测量可以在 Euclid 第二次数据发布及后续数据中被探测到。
引用
@article{arxiv.2410.06268,
title = {Euclid: Relativistic effects in the dipole of the 2-point correlation function},
author = {F. Lepori and S. Schulz and I. Tutusaus and M. -A. Breton and S. Saga and C. Viglione and J. Adamek and C. Bonvin and L. Dam and P. Fosalba and L. Amendola 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 A. Caillat and S. Camera and V. Capobianco and C. Carbone 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 L. Conversi and Y. Copin and F. Courbin and H. M. Courtois and H. Degaudenzi and G. De Lucia and F. Dubath and C. A. J. Duncan and X. Dupac and S. Dusini and M. Farina and S. Farrens and S. Ferriol and M. Frailis and E. Franceschi and S. Galeotta 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 S. Ilić and K. Jahnke and M. Jhabvala and E. Keihänen and A. Kiessling and M. Kilbinger 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 M. Melchior 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 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 F. Raison and A. Renzi and J. Rhodes and G. Riccio and E. Romelli and M. Roncarelli and C. Rosset and E. Rossetti and R. Saglia and Z. Sakr and A. G. Sánchez and D. Sapone and B. Sartoris and M. Schirmer and P. Schneider and T. Schrabback and A. Secroun and G. Seidel and S. Serrano and C. Sirignano and G. Sirri and L. Stanco and J. Steinwagner and P. Tallada-Crespí and I. Tereno and R. Toledo-Moreo and F. Torradeflot and L. Valenziano and T. Vassallo and Y. Wang and J. Weller and E. Zucca and C. Burigana and G. Fabbian and F. Finelli and A. Pezzotta and V. Scottez and M. Viel},
journal= {arXiv preprint arXiv:2410.06268},
year = {2025}
}
备注
21 pages, 11 figures, 1 appendix; submitted on behalf of the Euclid Collaboration. Accepted for publication in Astronomy & Astrophysics