Ia型超新星遗迹的三维数值模拟研究

Ia型超新星在天体物理中扮演着重要角色。但是其前身星模型和具体的爆发机制依然不清楚。目前，Ia型超新星前身星的主流模型是单简并星模型和双简并星模型。二者给出的星周物质环境和爆炸抛射物结构存在明显不同，这会导致对应的Ia超新星遗迹出现显著差异。在此项目中，拟采用真实的星周物质模型与抛射物结构，对单简并星模型下抛射物与星周物质的相互作用开展详细的三维模拟研究，给出对应的Ia型超新星遗迹的具体观测特征。此研究将为Ia型超新星遗迹的观测提供理论预言和依据。把我们的结果与观测进行比较，可以有效地检验单简并星模型的可靠性，从而对Ia型超新星的前身星模型做出限制。

Type Ia supernovae （SNe Ia） play a fundamental role in astrophysics. However, the specific progenitor systems as well as the details of the explosion mechanism of SNe Ia remain a mystery. The two leading progenitor scenarios are the single-degenerate (SD) scenario and the double-degenerate (DD) scenario. The surrounding medium and detailed structures of SN ejecta in the SD scenario are expected to be significantly different from those in the DD scenario. This leads to that the observational properties of the resulting SN remnants (SNRs) these two scenarios are quite different. By adopting more realistic the surrounding medium model and the SN ejecta structure derived from the SD scenario, the project proposed here will undertake a detailed investigation of the observational properties of the resulting SNRs by performing three-dimensional simulations of the interaction between the SN ejecta and the surrounding medium. With these simulations, we will provide the theoretical predictions for the observations of SNRs. Our models will be compared to the observed properties of SNRs to gain insights on the viability of SD scenario and put constraints on the progenitors of SNe Ia.