Euclid：探索簇类宇宙学中的观测系统效应——对簇计数与聚类综合分析
宇宙学与河外天体物理
2026-05-13 v1
摘要
本研究探讨了观测与建模系统效应对簇数量计数和簇聚类及其联合分析的影响，旨在为 \Euclid 调查提供模型指南。我们利用1000个 \Euclid-类簇目录，检讀系统不确定性对簇概要统计量及其自相关与交叉协方差的影响，并进行似然分析以评估其对宇宙学约束的影响，重点关注物质密度参数 和功率谱振幅 。将簇聚类与数量计数组合可显著提升宇宙学约束，仅凭数量计数时的数据灵敏度提升超过300%。我们确认两种探针之间是不相关的，其组合得到的宇宙学约束对协方差的宇宙学依赖几乎不敏感。我们发现，光度红移不确定性会使宇宙学后验分布宽化20-30%，而次要效应如红移空间畸变（RSDs）对后验分布的影响较小——仅聚类分析时为5%，组合探针时为10%——但若被忽略会显著偏离约束结果。我们指出，低于 Mpc 的聚类尺度提供额外的约束力，而超过声学振荡尺度的尺度几乎对 和 参数贡献有限。RSDs 和光度- 不确定性也影响数量计数协方差，约占参数约束的15-20%。
引用
@article{arxiv.2510.13509,
title = {Euclid: Exploring observational systematics in cluster cosmology -- a comprehensive analysis of cluster counts and clustering},
author = {A. Fumagalli and M. Costanzi and T. Castro and A. Saro and S. Borgani and M. Romanello and F. Marulli and E. Tsaprazi and P. Monaco and B. Altieri and A. Amara and L. Amendola and S. Andreon and N. Auricchio and C. Baccigalupi and M. Baldi and A. Balestra and S. Bardelli and A. Biviano and E. Branchini and M. Brescia and S. Camera and G. Cañas-Herrera and V. Capobianco and C. Carbone and J. Carretero and S. Casas and M. Castellano and G. Castignani and S. Cavuoti and K. C. Chambers and A. Cimatti and C. Colodro-Conde and G. Congedo and L. Conversi and Y. Copin and F. Courbin and H. M. Courtois and A. Da Silva and H. Degaudenzi and S. de la Torre and G. De Lucia and A. M. Di Giorgio and H. Dole and M. Douspis and F. Dubath and C. A. J. Duncan and X. Dupac and S. Dusini and S. Escoffier and M. Farina and R. Farinelli and F. Faustini and S. Ferriol and F. Finelli and P. Fosalba and N. Fourmanoit and M. Frailis and E. Franceschi and M. Fumana and S. Galeotta and K. George and B. Gillis and C. Giocoli and J. Gracia-Carpio and A. Grazian and F. Grupp and L. Guzzo and S. V. H. Haugan and W. Holmes and F. Hormuth and A. Hornstrup and K. Jahnke and M. Jhabvala and B. Joachimi and E. Keihänen and S. Kermiche and A. Kiessling and B. Kubik and M. Kümmel and M. Kunz and H. Kurki-Suonio and A. M. C. Le Brun and S. Ligori and P. B. Lilje and V. Lindholm and I. Lloro and G. Mainetti and D. Maino and E. Maiorano and O. Mansutti and O. Marggraf and M. Martinelli and N. Martinet and R. J. Massey and E. Medinaceli and S. Mei and Y. Mellier and M. Meneghetti and E. Merlin and G. Meylan and J. J. Mohr and A. Mora and M. Moresco and L. Moscardini and E. Munari and R. Nakajima 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 L. Pozzetti and F. Raison and R. Rebolo and A. Renzi and J. Rhodes and G. Riccio and E. Romelli and M. Roncarelli and C. Rosset and R. Saglia and Z. Sakr and A. G. Sánchez and D. Sapone and B. Sartoris and P. Schneider and T. Schrabback and A. Secroun and E. Sefusatti and G. Seidel and M. Seiffert and S. Serrano and P. Simon and C. Sirignano and G. Sirri and A. Spurio Mancini and L. Stanco and J. Steinwagner and P. Tallada-Crespí and D. Tavagnacco and A. N. Taylor and I. Tereno and N. Tessore and S. Toft and R. Toledo-Moreo and F. Torradeflot and I. Tutusaus and L. Valenziano and J. Valiviita and T. Vassallo and G. Verdoes Kleijn and A. Veropalumbo and Y. Wang and J. Weller and G. Zamorani and F. M. Zerbi and E. Zucca and C. Burigana and L. Gabarra and M. Maturi and C. Porciani and V. Scottez and M. Sereno and M. Viel},
journal= {arXiv preprint arXiv:2510.13509},
year = {2026}
}
备注
16 pages, 14 figures