GODMAX：使用JAX建模气体热力学与物质分布
GODMAX: Modeling gas thermodynamics and matter distribution using JAX
AI总结：
本研究推出基于JAX的全可微代码GODMAX，依托ANTILLES模拟套件联合拟合多红移、多质量暗晕的气体与物质分布轮廓，首次实现多种宇宙学探针的稳健联合分析，可提升重子物理相关宇宙学参数的约束精度。
摘要：
我们推出GODMAX（Gas thermODynamics and Matter distribution using jAX，基于JAX的气体热力学与物质分布建模工具），这是一款专为计算宇宙学物质分布与各类气体热力学量之间相关性而设计的新型代码。我们利用包含200个流体动力学模拟的大型ANTILLES模拟套件（该套件涵盖了范围广泛的重子反馈强度），联合拟合了不同暗晕质量和红移下总物质分布、电子密度及电子压强的三维轮廓。通过适配重子反馈导致的气体轮廓的显著变化、求解精确的流体静力学平衡方程，以及提供对非热压强支撑的灵活建模，GODMAX能够在测量不确定度范围内联合拟合所有这些轮廓。这一进展首次实现了对多种宇宙学探针的稳健联合分析，包括运动学与热学苏尼亚耶夫-泽尔多维奇（Sunyaev-Zel'dovich，SZ）效应、弱引力透镜以及X射线观测。此外，该模型准确捕捉了大质量暗晕中由重子反馈导致的总物质功率谱抑制与局域平均热力学量（如重子丰度和积分热SZ效应）之间的相关性，与流体动力学模拟的观测结果一致。展望未来，我们预测了即将到来的LSST弱引力透镜星表和西蒙斯天文台（Simons Observatory）热SZ图对宇宙学和重子参数的预期约束能力。该分析强调了弱引力透镜与热SZ的交叉关联在通过解决重子物理导致的主要系统不确定度来提升参数约束方面的重要性。GODMAX代码利用JAX库构建，形成了一个支持原生GPU编译的全可微暗晕模型。
英文摘要：
We introduce GODMAX (Gas thermODynamics and Matter distribution using jAX), a novel code designed to calculate correlations between the cosmological matter distribution and various gas thermodynamic quantities. Utilizing the extensive ANTILLES suite of 200 hydrodynamical simulations with a diverse range of baryonic feedback strengths, we jointly fit the 3D profiles of total matter distribution, electron density, and electron pressure across various halo masses and redshifts. By accommodating significant variations in gas profiles expected due to baryonic feedback, solving exact hydrostatic equilibrium equation and offering flexible modeling of non-thermal pressure support, GODMAX has the capability to jointly fit all these profiles within the measurement uncertainties. This advancement enables, for the first time, robust joint analyses of multiple cosmic probes, including the kinetic and thermal Sunyaev-Zel'dovich effect, weak lensing, and X-ray observations. Furthermore, the model accurately captures correlations between the total matter power suppression due to baryonic feedback and local average thermodynamic quantities, such as the baryon fraction and integrated tSZ effect, in high-mass halos, aligning with observations from hydrodynamical simulations. Looking ahead, we forecast the expected constraints on cosmological and baryonic parameters from upcoming weak lensing catalogs from the LSST and tSZ maps from the Simons Observatory. This analysis underscores the importance of cross-correlations between weak lensing and tSZ in enhancing parameter constraints by resolving major systematic uncertainties due to baryonic physics. The GODMAX code leverages the JAX library, resulting in a fully differentiable halo model with native GPU compilation support.
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