Euclid:基于重构的空洞-星系互相关函数的宇宙学预报
宇宙学与河外天体物理
2023-10-10 v3
摘要
我们研究了从Euclid光谱巡天中识别出的宇宙空洞与星系的互相关测量中可预期的宇宙学约束,该巡天将在红移范围 内对天区 deg 上数千万个星系提供光谱信息。我们使用从Flagship模拟星表(与预期光谱数据集特性紧密匹配的Euclid官方模拟)获得的模拟测量来完成此研究。为缓解各向异性选择偏置效应,我们在空洞寻找之前采用速度场重构方法从星系场中去除大尺度红移空间畸变。这使我们能够精确建模由空洞周围星系速度以及Alcock-Paczynski效应引起的互相关函数观测各向异性的贡献,并研究了约束对重构效率的依赖性。我们发现Euclid空洞能够将横向共动距离 与哈勃距离 之比约束到约 的相对精度,并在覆盖全红移范围的四个红移箱中每个将增长率 约束到 至 的精度。在标准宇宙学模型中,这转化为来自空洞的物质密度参数统计不确定性 ,优于单独由Euclid星系成团性或弱引力透镜所能达到的精度。我们还发现,仅空洞就能以 的精度测量暗能量状态方程。
引用
@article{arxiv.2302.05302,
title = {Euclid: Cosmology forecasts from the void-galaxy cross-correlation function with reconstruction},
author = {S. Radinović and S. Nadathur and H. -A. Winther and W. J. Percival and A. Woodfinden and E. Massara and E. Paillas and S. Contarini and N. Hamaus and A. Kovacs and A. Pisani and G. Verza and M. Aubert and A. Amara and N. Auricchio and M. Baldi and D. Bonino and E. Branchini and M. Brescia and S. Camera and V. Capobianco and C. Carbone and V. F. Cardone 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 A. Da Silva and M. Douspis and F. Dubath and X. Dupac and S. Farrens and S. Ferriol and P. Fosalba and M. Frailis and E. Franceschi and M. Fumana and S. Galeotta and B. Garilli and W. Gillard and B. Gillis and C. Giocoli and A. Grazian and F. Grupp and S. V. H. Haugan and W. Holmes and A. Hornstrup and K. Jahnke and M. Kümmel and A. Kiessling and M. Kilbinger and T. Kitching and H. Kurki-Suonio and S. Ligori and P. B. Lilje and I. Lloro and E. Maiorano and O. Mansutti and O. Marggraf and K. Markovic and F. Marulli and R. Massey and S. Mei and M. Melchior and Y. Mellier and M. Meneghetti and E. Merlin and G. Meylan and M. Moresco and L. Moscardini and S. -M. Niemi and J. W. Nightingale and T. Nutma 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 A. Renzi and J. Rhodes and G. Riccio and E. Romelli and M. Roncarelli and C. Rosset and R. Saglia and D. Sapone and B. Sartoris and P. Schneider 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 I. Tereno and R. Toledo-Moreo and F. Torradeflot and I. Tutusaus and E. A. Valentijn and L. Valenziano and T. Vassallo and Y. Wang and J. Weller and G. Zamorani and J. Zoubian and V. Scottez},
journal= {arXiv preprint arXiv:2302.05302},
year = {2023}
}
备注
20 pages, 13 figures, accepted version