论文标题

从超新星到超新星残留:热核爆炸模型的比较

From supernova to supernova remnant: comparison of thermonuclear explosion models

论文作者

Ferrand, Gilles, Warren, Donald C., Ono, Masaomi, Nagataki, Shigehiro, Roepke, Friedrich K., Seitenzahl, Ivo R., Lach, Florian, Iwasaki, Hiroyoshi, Sato, Toshiki

论文摘要

超新星(SN)的三维建模的进展促使我们重新审视超新星残留阶段。我们继续研究其产生的SNR的热核爆炸的烙印,我们从Chandrasekhar-Mass White Dwarf的延迟detonation模型开始。在这里,我们比较了两种不同类型的爆炸模型,每种模型都有两个变体:两个延迟的爆炸模型(N100DDT,N5DDT)和两个纯deflagration模型(N100DEF,N5DEF),其中N数字参与了点火。每个SN模拟的输出用作爆炸后500年进行的SNR模拟的输入。尽管随着时间的流逝,所有SNR模型都变得更加球形,并且整体显示了年轻SNR的理论结构,但模型之间的明显差异是可见的,具体取决于点火开关的几何形状以及存在或不存在爆炸的前部。与N100型号相比,N5模型具有强大的偶极子分量,并产生不对称的残余物。 N5DEF会产生常规的外观,但抵消了残留物,而N5DDT产生了双面残留物。纯幻影模型表现出特定的特征:由于不完全的爆炸,并且在整个表面上的接缝线网络,燃烧细胞之间的边界。 SN的签名主导着爆炸后SNR的形态,最高为100年至300年,具体取决于模型,并且仍可在500年时测量,这可能提供了一种测试爆炸模型的方法。

Progress in the three-dimensional modeling of supernovae (SN) prompts us to revisit the supernova remnant (SNR) phase. We continue our study of the imprint of a thermonuclear explosion on the SNR it produces, that we started with a delayed-detonation model of a Chandrasekhar-mass white dwarf. Here we compare two different types of explosion models, each with two variants: two delayed detonation models (N100ddt, N5ddt) and two pure deflagration models (N100def, N5def), where the N number parametrizes the ignition. The output of each SN simulation is used as input of a SNR simulation carried on until 500 yr after the explosion. While all SNR models become more spherical over time and overall display the theoretical structure expected for a young SNR, clear differences are visible amongst the models, depending on the geometry of the ignition and on the presence or not of detonation fronts. Compared to N100 models, N5 models have a strong dipole component, and produce asymmetric remnants. N5def produces a regular-looking, but offset remnant, while N5ddt produces a two-sided remnant. Pure deflagration models exhibit specific traits: a central over-density, because of the incomplete explosion, and a network of seam lines across the surface, boundaries between burning cells. Signatures from the SN dominate the morphology of the SNR up to 100 yr to 300 yr after the explosion, depending on the model, and are still measurable at 500 yr, which may provide a way of testing explosion models.

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