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arXiv 1504.00422astro-ph.HE
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第谷超新星遗迹中的逆激波

Reverse-Shock in Tycho's Supernova Remnant

F. J. Lu, M. Y. Ge, S. J. Zheng, S. N. Zhang, X. Long, B. Aschenbach

摘要:

来自年轻超新星遗迹(SNRs)的热X射线辐射通常由超新星(SN)喷出物的发射线主导,人们普遍认为这些发射线被向内传播的反向激波(RS)交叉并因此被加热。先前使用成像X射线数据的工作表明,通过定位最近电离物质的峰值发射区域,喷出物被RS加热,该区域被发现与最外边界向内侧分离得很好。在这里,我们报告的硫(S),硅(Si)K $α$线通量比与半径在第谷的SNR系统增加的发现。这使我们能够,第一次,提出连续的径向分布的电离年龄,而且,经过电离时间,因为电离的开始,这告诉传播历史的电离前沿到SNR喷出物。

英文摘要:

Thermal X-ray emission from young supernova remnants (SNRs) is usually dominated by the emission lines of the supernova (SN) ejecta, which are widely believed being crossed and thus heated by the inwards propagating reverse shock (RS). Previous works using imaging X-ray data have shown that the ejecta are heated by the RS by locating the peak emission region of the most recently ionized matter, which is found well separated towards the inside from the outermost boundary. Here we report the discovery of a systematic increase of the Sulfur (S) to Silicon (Si) K$α$ line flux ratio with radius in Tycho's SNR. This allows us, for the first time, to present continuous radial profiles of the ionization age and, furthermore, the elapsed ionization time since the onset of the ionization, which tells the propagation history of the ionization front into the SNR ejecta.

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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