Toward the Core Collapse Supernova Mechanism: The Next Generation in Neutrino Transport and Convection

超新星事件中恒星的坍缩和随后的爆炸对宇宙中大多数重于氢和氦的元素的产生和分布起着重要的作用。这个项目涉及超新星核心坍缩过程的理论研究。人们正在采用一二维和三维的方法来为超新星事件的坍缩阶段构建一个广泛的数值模型网格。这项工作的目标是确定球面对称性、中微子输运、轴对称和对流对模型的相对影响，以及它们与观测到的超新星事件特征的一致性。一维和二维模拟利用现有的中微子传输代码。另外的三维代码正在开发中，以研究对流对超新星流体动力特性的影响。

ABSTRACTAST-9877130Mezzacappa, AnthonyThe collapse and subsequent explosion of stars in supernova events play a fundamental role in producing and distributing throughout the Universe most of the elements heavier than hydrogen and helium. This project involves a theoretical investigation of the supernova core collapse process. One- two- and three-dimensional approaches are being taken towards constructing an extensive grid of numerical models for the collapse phase of the supernova event. The goal of this effort is to determine the relative effects of spherical symmetry, neutrino transport, axial symmetry and convection on the models and their agreement with the observed characteristics of supernova events. The one- and two-dimensional simulations utilize existing neutrino transport code. Additional 3-D code is being developed to investigate the effects of convection on the hydrodynamic properties of supernova.