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

这个项目是对Ia型热核超新星（SNe Ia）的全面理论分析，它将解释影响Ia型超新星爆炸的任何三维（3D）过程，并将模型预测与现有和未来的高质量观测进行严格的比较。这些方法和技术将结合到远程访问snia计算管道中，该管道包括流体动力学，核合成和辐射输运的复杂3D模拟算法，以及snia数据的3D分析工具。超新星Ia对于确定暗能量的本质至关重要，而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、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，通过试图了解是什么影响了它们作为标准蜡烛的地位，特别是不同类型的祖系统，偏离球形对称，以及与星周物质的相互作用。一个重要的成果将是一套全面的观测验证的第一原理多维爆炸模型。确定Ia超新星的预测和观测特征之间的物理相关性对于提高其校准的准确性至关重要。通过研究Ia超新星涉及的许多领域，如数值方法、大规模流体动力学和辐射输运模拟、观测和宇宙学应用，这项工作是向学生介绍跨学科和多领域科学的一个特殊平台。研究成果将通过已开发的计算管道提供给广泛的科学界，并将分发给更广泛的非技术受众。这些结果也将有利于当前和未来的地面和空间观测项目。

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.