arXiv:2602.23518stat.MLcs.LG2026-02被引 1

用辅助变量让生成模型看清暗晕的物理结构。

Uncovering Physical Drivers of Dark Matter Halo Structures with Auxiliary-Variable-Guided Generative Models

  • 引入质量与浓度作辅助变量,引导潜空间解耦。
  • 模型恢复了质量-浓度关系,发现异常结构线索。
  • 适合天体物理与宇宙学数据挖掘者使用。

深度生成模型(DGMs)能压缩高维数据,但常将不同物理因素混杂在潜空间中。本文提出一种基于辅助变量的框架,用于解耦暗物质晕的热萨克斯-泽尔多维奇(tSZ)图的表征。引入晕质量与浓度作为辅助变量,并施加轻量级对齐惩罚,促使潜空间维度反映这些物理量。为生成清晰逼真的样本,将最先进的潜条件流匹配(LCFM)扩展为支持潜空间解耦。所提出的解耦潜-CFM(DL-CFM)模型恢复了已知的质量-浓度标度关系,并识别出可能对应异常晕形成历史的潜空间离群点。通过将潜坐标与可解释的天体物理属性关联,本方法使潜空间成为宇宙结构的诊断工具。结果表明,辅助引导在保持生成灵活性的同时,获得物理意义明确的解耦嵌入,为复杂天文数据中独立因子的发现提供了可推广路径。

原文摘要 · Abstract (English)

Deep generative models (DGMs) compress high-dimensional data but often entangle distinct physical factors in their latent spaces. We present an auxiliary-variable-guided framework for disentangling representations of thermal Sunyaev-Zel'dovich (tSZ) maps of dark matter halos. We introduce halo mass and concentration as auxiliary variables and apply a lightweight alignment penalty to encourage latent dimensions to reflect these physical quantities. To generate sharp and realistic samples, we extend latent conditional flow matching (LCFM), a state-of-the-art generative model, to enforce disentanglement in the latent space. Our Disentangled Latent-CFM (DL-CFM) model recovers the established mass-concentration scaling relation and identifies latent space outliers that may correspond to unusual halo formation histories. By linking latent coordinates to interpretable astrophysical properties, our method transforms the latent space into a diagnostic tool for cosmological structure. This work demonstrates that auxiliary guidance preserves generative flexibility while yielding physically meaningful, disentangled embeddings, providing a generalizable pathway for uncovering independent factors in complex astronomical datasets.

生成模型暗物质潜空间天体物理

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