Exploration of Aspherical Ejecta Properties in Type Ia Supernovae: Progenitor Dependence and Applications to Progenitor Classification
Exploration of Aspherical Ejecta Properties in Type Ia Supernovae: Progenitor Dependence and Applications to Progenitor Classification
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DOI：
10.3847/1538-4357/abc9c1
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发表时间：
2020-11
期刊：
影响因子：
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通讯作者：
S. Leung;R. Diehl;K. Nomoto;T. Siegert
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文献类型：
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作者：
S. Leung;R. Diehl;K. Nomoto;T. Siegert
经过仔细观察，发现Ia型超新星（SNe Ia）的几次爆炸都表现出偏离球面对称的现象。例如，INTEGRAL/SPI测量的SN 2014 J的伽马射线线，以及来自更古老遗迹（如第谷）中放射性同位素的形态信息。在超新星Ia中，诸如点火几何形状和燃烧形态等参数的影响的系统研究仍然缺失。我们使用一个二维的流体动力学代码与后处理核合成和模拟的双重爆轰在一个亚rasekhar质量的碳-氧白色矮星开始的核失控积累的He信封走向中断的白色矮星。我们探索潜在的多样性，通过四个触发的情况下，采样主要的不对称驱动程序。我们进一步研究了它们对基于单个元素的喷出物的非球面结构的全球影响。我们将结果应用于观测良好的SN 2014 J和其他最近观测到的SN残留物，以说明这些新的观测数据以及其他观测到的数量如何有助于限制SNe Ia的爆炸和祖先。
Several explosions of type Ia 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 of the effects of parameters such as ignition geometry and burning morphology in SNe Ia is still missing. We use a two-dimensional hydrodynamics code with postprocessing 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 toward 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 progenitors of SNe Ia.