暗能量调查第三年结果：基于深度学习的弱力学和星系聚类图的模拟基 $w$CDM 推断：分析设计
宇宙学与河外天体物理
2026-02-19 v2 机器学习
摘要
数据驱动的方法正在使用深度学习成为从宇宙大尺度结构中提取非高斯信息的强大技术。本工作提出了首个结合弱力学和星系聚类图的模拟基推断（SBI）管道，采用真实的暗能量调查第三年（DES Y3）配置，为即将发布的调查数据分析做准备。我们基于CosmoGridV1套组的N体模拟开发了可扩展的前向模型，生成超过一百万个DES Y3图层水平的自洽模拟实现。利用这大数据集，我们在整个调查覆盖范围内采用球面几何训练深度图卷积神经网络，以学习大约最大化与目标参数互信息的低维特征。这些学习到的压缩特征通过标准化流在十维参数空间中进行神经密度估计，该参数空间涵盖宇宙学 CDM、固有错位和线性星系偏置参数，同时对重力、光度红移和剪切偏差等nuisance参数进行边际化。为确保鲁棒性，我们广泛使用从前向模型中系统污染以及独立的Buzzard星系目录派生的合成观测来验证推断管道。我们的预测显著改进了宇宙学参数约束，在 平面上相对于我们对基础二点统计量的实现实现了 的更高效用分数，并通过探针组合有效打破参数退化。这些结果表明，受深度学习驱动的SBI分析为即将到来的Stage-IV宽场成像调查提供了巨大的潜力。
引用
@article{arxiv.2511.04681,
title = {Dark Energy Survey Year 3 results: Simulation-based $w$CDM inference from weak lensing and galaxy clustering maps with deep learning: Analysis design},
author = {A. Thomsen and J. Bucko and T. Kacprzak and V. Ajani and J. Fluri and A. Refregier and D. Anbajagane and F. J. Castander and A. Ferté and M. Gatti and N. Jeffrey and A. Alarcon and A. Amon and K. Bechtol and M. R. Becker and G. M. Bernstein and A. Campos and A. Carnero Rosell and C. Chang and R. Chen and A. Choi and M. Crocce and C. Davis and J. DeRose and S. Dodelson and C. Doux and K. Eckert and J. Elvin-Poole and S. Everett and P. Fosalba and D. Gruen and I. Harrison and K. Herner and E. M. Huff and M. Jarvis and N. Kuropatkin and P. -F. Leget and N. MacCrann and J. McCullough and J. Myles and A. Navarro-Alsina and S. Pandey and A. Porredon and J. Prat and M. Raveri and M. Rodriguez-Monroy and R. P. Rollins and A. Roodman and E. S. Rykoff and C. Sánchez and L. F. Secco and E. Sheldon and T. Shin and M. A. Troxel and I. Tutusaus and T. N. Varga and N. Weaverdyck and R. H. Wechsler and B. Yanny and B. Yin and Y. Zhang and J. Zuntz and M. Aguena and S. Allam and F. Andrade-Oliveira and D. Bacon and J. Blazek and D. Brooks and R. Camilleri and J. Carretero and R. Cawthon and L. N. da Costa and M. E. da Silva Pereira and T. M. Davis and J. De Vicente and S. Desai and P. Doel and J. García-Bellido and G. Gutierrez and S. R. Hinton and D. L. Hollowood and K. Honscheid and D. J. James and K. Kuehn and O. Lahav and S. Lee and J. L. Marshall and J. Mena-Fernández and F. Menanteau and R. Miquel and J. Muir and R. L. C. Ogando and A. A. Plazas Malagón and E. Sanchez and D. Sanchez Cid and I. Sevilla-Noarbe and M. Smith and E. Suchyta and M. E. C. Swanson and D. Thomas and C. To and D. L. Tucker},
journal= {arXiv preprint arXiv:2511.04681},
year = {2026}
}
备注
39 pages, 14 figures