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arXiv 0810.4687astro-ph
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用Chandra探测年轻超新星遗迹中的Cr-K发射线

A Cr-K emission line survey in young supernova remnants with Chandra

X. J. Yang, H. Tsunemi, F. J. Lu, L. Chen

摘要:

我们进行了一个年轻的超新星遗迹(SNRs)的钱德拉档案数据的铬-钾发射线调查。我们的样本包括W 49 B,Cas A,Tycho和Kepler。我们在W 49 B中证实了Cr线的存在,并在其他三个SNR中发现了这条发射线。给出了Cr线的线中心能量、等效宽度和通量。Cas A中的Cr处于高电离态,而Tycho和Kepler中的Cr处于低电离态。我们发现Cr和Fe的线中心能量之间有很好的正相关性,这表明Cr和Fe在核合成中有共同的起源,这与理论预测是一致的。我们建议,EW之间的Cr和Fe的比例可以作为一个补充约束的祖细胞的性能和爆炸机制。

英文摘要:

We performed a Cr-K emission line survey in young supernova remnants (SNRs) with the Chandra archival data. Our sample includes W49B, Cas A, Tycho and Kepler. We confirmed the existence of the Cr line in W49B and discovered this emission line in the other three SNRs. The line center energies, equivalent widths (EWs) and fluxes of the Cr lines are given. The Cr in Cas A is in a high ionization state while that in Tycho and Kepler is in a much lower one. We find a good positive correlation between Cr and Fe line center energies, suggesting a common origin of Cr and Fe in the nucleosynthesis, which is consistent with the theoretical predictions. We propose that the EW ratio between Cr and Fe can be used as a supplementary constraint on the progenitors' properties and the explosion mechanism.

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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