论文标题
IA型超新星中的非球形喷射特性的探索：祖细胞依赖性和对祖细胞分类的应用
Exploration of Aspherical Ejecta Properties in Type Ia Supernova: Progenitor Dependence and Applications to Progenitor Classification
论文作者
论文摘要
在仔细检查后，发现热核超新星（SNE IA）的几次爆炸表现出与球形对称性的偏差。示例是通过积分/SPI测量的SN 2014J的伽马射线线，以及来自Tycho等老年残留物中的放射性同位素的形态信息。关于参数（例如点火几何学和燃烧形态）在SNE IA中的影响的系统研究仍缺失。我们使用2D流体力学代码与后处理的核合成，并模拟亚chandrasekhar质量碳 - 氧气白色矮人的双重爆炸，从核逃亡者开始，从累积的他的核能中开始，他构成了破坏白色矮人的破坏。我们通过四个触发场景来探索潜在的变化，这些方案采样了主要的不对称驱动因素。我们进一步研究了它们基于各个元素对喷射的非球体结构的全球影响。我们将结果应用于观察到的SN 2014J和其他最近观察到的SN残留物，以说明这些新的观察数据以及其他观察到的数量如何有助于限制爆炸和SNE IA的祖细胞。
Several explosions of thermonuclear supernovae (SNe Ia) have been found to exhibit deviations from spherical symmetry upon closer inspection. Examples are the gamma-ray lines from SN 2014J as measured by INTEGRAL/SPI, and morphology information from radioactive isotopes in older remnants such as Tycho. A systematic study on the effects of parameters such as ignition geometry and burning morphology in SNe Ia is still missing. We use a 2D hydrodynamics code with post-processing nucleosynthesis and simulate the double detonations in a sub-Chandrasekhar mass carbon-oxygen white dwarf starting from the nuclear runaway in the accumulated He envelope towards disruption of the white dwarf. We explore potential variety through four triggering scenarios that sample main asymmetry drivers. We further investigate their global effects on the aspherical structure of the ejecta based on individual elements. We apply the results to the well observed SN 2014J and other recently observed SN remnants in order to illustrate how these new observational data together with other observed quantities help to constrain the explosion and the progenitors of SNe Ia.
