\textit{Euclid}：从星系到引力波——预测随机引力波背景各向异性及其交叉相关
广义相对论与量子宇宙学
2025-11-17 v1 宇宙学与河外天体物理
摘要
我们估计因压缩双粒子坍缩(CBC)事件引起的随机引力波背景(SGWB)能量密度的�幅及空间各向异性，包括双黑洞(BBH)、双中子星(BNS)以及黑洞-中子星(BHNS)合并事件。我们以 \textit{Euclid} 联盟开发的旗舰级星系目录作为出发点。对于目录中的每颗星系，我们利用模拟得到的质量和星际形成历史约束该星系的星际形成历史，并通过 CBC 合并预测其对引力波能量密度的贡献。将来自目录中所有星系的贡献相加后，可得到该 CBC SGWB 的频谱和空间各向异性的预测。我们还将该预测与由压缩双粒子生成的半解析 SGWB 模型进行比较。我们识别出一组有效参数，能够捕捉这些模型的关键特征，并应用贝叶斯框架在假设理想情境下的 cosmic variance 限制搜索中推断这些参数。这标志着开发一个综合框架的第一步，最终将使得 SGWB 各向异性与 \textit{Euclid} 星系数据的相关性成为可能，从而可能从这一新观测量中提取有价值的天体物理信息。
引用
@article{arxiv.2511.11509,
title = {\textit{Euclid}: From Galaxies to Gravitational Waves -- Forecasting Stochastic Gravitational Wave Background Anisotropies and Their Cross-Correlation},
author = {K. Z. Yang and G. Cusin and V. Mandic and C. Scarlata and J. Suresh and B. Altieri and N. Auricchio and C. Baccigalupi and M. Baldi 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 A. Costille and F. Courbin and H. M. Courtois and H. Degaudenzi and G. De Lucia and H. Dole and F. Dubath 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 P. Gómez-Alvarez and J. Gracia-Carpio and A. Grazian and F. Grupp 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. 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 O. Mansutti and S. Marcin and O. Marggraf and M. Martinelli and N. Martinet and F. Marulli and E. Medinaceli and S. Mei and Y. Mellier and M. Meneghetti and E. Merlin and G. Meylan and A. Mora 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 L. Pozzetti and F. Raison and A. Renzi and J. Rhodes and G. Riccio and E. Romelli and M. Roncarelli and R. Saglia and Z. Sakr and D. Sapone and B. Sartoris and M. Schirmer and P. Schneider and A. Secroun and E. Sefusatti and G. Seidel and S. Serrano and C. Sirignano and G. Sirri and L. Stanco and J. Steinwagner and P. Tallada-Crespí 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 A. Veropalumbo and J. Weller and G. Zamorani and F. M. Zerbi and E. Zucca and T. Castro and J. García-Bellido and V. Scottez and M. Viel and P. Monaco},
journal= {arXiv preprint arXiv:2511.11509},
year = {2025}
}
备注
27 pages, 8 figures, 1 table