Collaborative research: Three-Dimensional Simulations of Type Ia Supernovae: Constraining Models with Observations

AST-0709181/AST-0707704/AST-0708873/AST-0708855Kohkhlov/Baron/Wang/HoeflichThis项目是对热核Ia型超新星(SneIa)的全面理论分析，它将解释影响SneIa爆炸的任何三维(3D)过程，并将提供模型预测与现有和未来高质量观测的严格比较。这些方法和技术将被结合到远程访问SNE Ia计算管道中，该管道包括用于流体动力学、核合成和辐射传输的复杂3D模拟算法，以及用于SNE Ia数据的3D分析工具。SneIa对于确定暗能量的性质至关重要，暗能量是现代科学面临的最重要的问题之一，因为它们是宇宙中最直接和最精确的距离指示器之一。这项研究的结果将改善这些关键工具的宇宙学校准，试图了解是什么影响了它们作为标准蜡烛的地位，特别是不同类型的前体系统，球对称的偏差，以及与星周物质的相互作用。一个重要的结果将是一套全面的经观测验证的SNE Ia的第一原理多维爆炸模型。识别SNE Ia的预测和观测信号之间的物理联系对于提高它们的定标精度至关重要。这项工作是通过研究SNE Ia所涉及的许多领域，如数值方法、大规模流体力学和辐射传输模拟、观测和宇宙学应用，向学生介绍跨学科和多领域科学的特殊平台。研究成果将通过开发的计算渠道提供给广大科学界，并将传播给更广泛的非技术受众。这一结果也将有利于目前和未来的地面和天基观测计划。

AST-0709181/AST-0707704/AST-0708873/AST-0708855Kohkhlov/Baron/Wang/HoeflichThis project is a comprehensive theoretical analysis of thermonuclear Type Ia supernovae (SNe Ia), which will account for any three-dimensional (3D) processes affecting SNe Ia explosions, and will provide a rigorous comparison of model predictions with existing and future high quality observations. The methods and techniques will be combined into the remote-access SNe Ia computational pipeline, which comprises sophisticated 3D simulation algorithms for fluid dynamics, nucleosynthesis, and radiation transport, as well as tools for the 3D analysis of SNe Ia data. SNe Ia are crucial for identifying the nature of dark energy, one of the most important problems facing modern science, because they serve as one of the most direct and precise distance indicators in the Universe. The results of this study will improve the cosmological calibration of these critical tools, by trying to understand what affects their status as standard candles, notably the different types of progenitor systems, deviations from spherical symmetry, and interaction with circumstellar matter. One important outcome will be a comprehensive set of observationally verified first-principles multidimensional explosion models of SNe Ia. Identifying physical correlations among predicted and observed signatures of SNe Ia will be crucial for improving the accuracy of their calibration.This work is an exceptional platform for introducing students to cross-disciplinary and multi-field science, through the many areas involved in studying SNe Ia, such as numerical methods, large-scale hydrodynamics and radiation transport simulations, observations, and cosmological applications. Research results will be made available to the broad scientific community via the developed computational pipeline, and will be disseminated to the wider non-technical audience. The results will also benefit current and future ground- and space-based observing programs.