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arXiv 2201.04653astro-ph.HE
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Ia型超新星遗迹N103B中CSM辐射的定位

Locating the CSM Emission within the Type Ia Supernova Remnant N103B

Benson T. Guest, William P. Blair, Kazimierz J. Borkowski, Parviz Ghavamian, Sean P. Hendrick, Knox S. Long, Robert Petre, John C. Raymond, Armin Rest, Ravi San… 展开作者

Benson T. Guest, William P. Blair, Kazimierz J. Borkowski, Parviz Ghavamian, Sean P. Hendrick, Knox S. Long, Robert Petre, John C. Raymond, Armin Rest, Ravi Sankrit, Ivo R. Seitenzahl, Brian J. Williams

摘要:

我们目前的结果,从深钱德拉观测的年轻Ia型超新星遗迹(SNR)0509-68.7,也被称为N103 B,位于大麦云云(LMC)。残骸显示出亮度的不对称性,西半球明显比东半球亮。以前的多波长观测将这种差异归因于密度梯度,并提出了星周物质的来源,与开普勒的SNR相似。我们应用聚类技术结合传统的成像分析,在空间上定位各种排放成分的残余。我们发现,O和Mg的排放是最强的沿冲击波,并符合斯皮策观测的尘埃排放和光学发射的非辐射冲击。在这些地区的O和Mg的丰度增强相对于平均LMC丰度,并出现作为一个独特的空间分布相比,喷出物的产品,支持星周介质(CSM)的解释。我们还发现,Cr的空间分布是相同的,在残留物的内部的Fe,并不符合在所有的O和Mg的排放。

英文摘要:

We present results from deep Chandra observations of the young Type Ia supernova remnant (SNR) 0509-68.7, also known as N103B, located in the Large Magellanic cloud (LMC). The remnant displays an asymmetry in brightness, with the western hemisphere appearing significantly brighter than the eastern half. Previous multi-wavelength observations have attributed the difference to a density gradient and suggested circumstellar material origins, drawing similarities to Kepler's SNR. We apply a clustering technique combined with traditional imaging analysis to spatially locate various emission components within the remnant. We find that O and Mg emission is strongest along the blast wave, and coincides with Spitzer observations of dust emission and optical emission from the non-radiative shocks. The abundances of O and Mg in these regions are enhanced relative to the average LMC abundances and appear as a distinct spatial distribution compared to the ejecta products, supporting the circumstellar medium (CSM) interpretation. We also find that the spatial distribution of Cr is identical to that of Fe in the interior of the remnant, and does not coincide at all with the O and Mg emission.

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