Euclid：对原初特征的搜寻
宇宙学与河外天体物理
2024-04-01 v2
摘要
印刻在密度扰动原初功率谱中的原初特征，特别是振荡信号，代表了探测高能标新物理的明确机遇。得益于红移覆盖与非线性尺度的高精度测量，Euclid 空间任务未来的光谱与测光测量将对原初功率谱提供独特约束，从而使我们能够研究对标准幂律原初功率谱的偏离。我们考虑两种在物质功率谱上叠加原初无阻尼振荡的模型，一种在 k 空间中线性间隔，另一种在 k 空间中对数间隔。我们通过对光谱星系成团性、弱引力透镜、测光星系成团性、测光探针间交叉相关、光谱星系成团性双谱、CMB 温度与 E 模偏振、温度-偏振交叉相关以及 CMB 弱引力透镜应用 Fisher 矩阵方法，预报不确定性。我们还研究了一种非线性密度重构方法，以提取原初功率谱中的振荡信号。我们得到如下特征振幅的百分比相对误差（Euclid 主探针，线性（对数）特征模型）：在悲观设定下为 21%（22%），在乐观设定下为 18%（18%），置信水平（CL）为 68.3%，使用 GC_sp+WL+GC_ph+XC。结合 Euclid 预期探索的所有信息源与未来类 SO 的 CMB 实验，我们预报在频率范围 (1, 10^{2.1}) 内，对乐观与悲观设定均有 GC_sp(PS rec + BS)+WL+GC_ph+XC+SO-like 下的 A_lin ≃ 0.010 ± 0.001（68.3% CL）与 A_log ≃ 0.010 ± 0.001。
引用
@article{arxiv.2309.17287,
title = {Euclid: The search for primordial features},
author = {M. Ballardini and Y. Akrami and F. Finelli and D. Karagiannis and B. Li and Y. Li and Z. Sakr and D. Sapone and A. Achúcarro and M. Baldi and N. Bartolo and G. Cañas-Herrera and S. Casas and R. Murgia and H. A. Winther and M. Viel and A. Andrews and J. Jasche and G. Lavaux and D. K. Hazra and D. Paoletti and J. Valiviita and A. Amara and S. Andreon and N. Auricchio and P. Battaglia 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 S. Cavuoti and A. Cimatti and G. Congedo and L. Conversi and Y. Copin and L. Corcione and F. Courbin and H. M. Courtois and A. Da Silva and H. Degaudenzi and F. Dubath and X. Dupac and M. Farina and S. Farrens and M. Frailis and E. Franceschi and M. Fumana 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 P. Hudelot and K. Jahnke and S. Kermiche and A. Kiessling and M. Kunz and H. Kurki-Suonio and P. B. Lilje and V. Lindholm and I. Lloro and E. Maiorano and O. Mansutti and O. Marggraf 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 E. Munari and S. M. Niemi 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 A. Renzi and J. Rhodes and G. Riccio and E. Romelli and M. Roncarelli and R. Saglia and B. Sartoris and T. Schrabback and A. Secroun and G. Seidel and S. Serrano and C. Sirignano and G. Sirri and L. Stanco and J. L. Starck and C. Surace and P. Tallada-Crespí and A. N. Taylor and I. Tereno and R. Toledo-Moreo and F. Torradeflot and I. Tutusaus and E. A. Valentijn and L. Valenziano and T. Vassallo and A. Veropalumbo and Y. Wang and J. Weller and G. Zamorani and J. Zoubian and V. Scottez},
journal= {arXiv preprint arXiv:2309.17287},
year = {2024}
}
备注
23 pages, 9 figures, 4 tables