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arXiv 2103.07599astro-ph.HE
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超新星遗迹N103B中双环结构的发现:Ia型超新星前身星双极风的证据

Discovery of Double-Ring Structure in the Supernova Remnant N103B: Evidence for Bipolar Winds from a Type Ia Supernova Progenitor

Hiroya Yamaguchi, Fabio Acero, Chuan-Jui Li, You-Hua Chu

摘要:

超新星遗迹(SNR)的几何结构提供了揭示其祖先爆炸前演化的线索。在这里,我们提出了一个X射线研究N103 B(0509-68.7),一个Ia型SNR的大麦云,这是已知的是与密集的拱星物质(CSM)的相互作用。应用我们的新方法进行特征提取深钱德拉观测,我们已经成功地解决了CSM,富铁喷出物,和中等质量元素(IME)喷出物的组成部分,并揭示了他们的空间分布。值得注意的是,IME喷出物组件表现出双环结构,这意味着SNR扩展成沙漏形腔,从而形成双极气泡的喷出物。这种解释是支持更多的定量光谱,揭示了一个明确的双峰的IME喷出物的电离状态的分布。这些观测结果可以自然地解释,如果祖双星系统在爆炸前在轨道平面上形成了一个密集的CSM环面,进一步证明SNR N103 B起源于一个单简并的祖星。

英文摘要:

The geometric structure of supernova remnants (SNR) provides a clue to unveiling the pre-explosion evolution of their progenitors. Here we present an X-ray study of N103B (0509-68.7), a Type Ia SNR in the Large Magellanic Cloud, that is known to be interacting with dense circumstellar matter (CSM). Applying our novel method for feature extraction to deep Chandra observations, we have successfully resolved the CSM, Fe-rich ejecta, and intermediate-mass element (IME) ejecta components, and revealed each of their spatial distribution. Remarkably, the IME ejecta component exhibits a double-ring structure, implying that the SNR expands into an hourglass-shape cavity and thus forms bipolar bubbles of the ejecta. This interpretation is supported by more quantitative spectroscopy that reveals a clear bimodality in the distribution of the ionization state of the IME ejecta. These observational results can be naturally explained if the progenitor binary system had formed a dense CSM torus on the orbital plane prior to the explosion, providing further evidence that the SNR N103B originates from a single-degenerate progenitor.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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