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arXiv 0910.3208astro-ph.HE
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利用X射线线发射形貌对超新星遗迹进行分型

Typing Supernova Remnants Using X-ray Line Emission Morphologies

Laura A. Lopez, Enrico Ramirez-Ruiz, Carles Badenes, Daniela Huppenkothen, Tesla E. Jeltema, David A. Pooley

摘要:

提出了一种新的观测方法来对年轻超新星遗迹的爆炸进行分类。通过对17个银河系和大麦云星云的钱德拉X射线谱线的形态学测量和多极展开分析(使用功率比),我们发现核心坍缩星云的谱线比Ia型星云的谱线在统计上更不对称。我们表明,这两类超新星可以使用这种技术自然分离,因为X射线线形态反映了不同的爆炸机制和结构的星周物质。这些发现与最近的光谱偏振结果一致,表明核心塌陷SNe本质上更不对称。

英文摘要:

We present a new observational method to type the explosions of young supernova remnants (SNRs). By measuring the morphology of the Chandra X-ray line emission in seventeen Galactic and Large Magellanic Cloud SNRs with a multipole expansion analysis (using power ratios), we find that the core-collapse SNRs are statistically more asymmetric than the Type Ia SNRs. We show that the two classes of supernovae can be separated naturally using this technique because X-ray line morphologies reflect the distinct explosion mechanisms and structure of the circumstellar material. These findings are consistent with recent spectropolarimetry results showing that core-collapse SNe are intrinsically more asymmetric.

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