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arXiv 1208.5322astro-ph.HE
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年轻超新星遗迹中非热X射线细丝的性质

The properties of non-thermal X-ray filaments in young supernova remnants

Robert Rettig, Martin Pohl

摘要:

上下文年轻的超新星遗迹(SNRs)表现出非热X射线发射的狭窄细丝,其宽度可以受到电子能量损失或磁场阻尼的限制。目标。我们想研究这些细丝的不同模型是否可以通过观测进行检验。方法.利用四个历史遗迹的观测参数,我们计算了暗条的轮廓,并将暗条的光谱与非热辐射的光谱进行了比较。为此,我们解决了一维稳态输运方程的各向同性微分数密度的电子。结果我们发现,之间的差异的光谱的细丝和总的非热辐射超过1千电子伏的阻尼模型比在能量损失模型更明显。结论.一个相当大的阻尼的磁场可以导致一个可观察到的差异之间的光谱的灯丝和总的非热发射,从而潜在地允许观察歧视之间的能量损失模型和阻尼模型的X射线灯丝。

英文摘要:

Context. Young supernova remnants (SNRs) exhibit narrow filaments of non-thermal X-ray emission whose widths can be limited either by electron energy losses or damping of the magnetic field. Aims. We want to investigate whether or not different models of these filaments can be observationally tested. Methods. Using observational parameters of four historical remnants, we calculate the filament profiles and compare the spectra of the filaments with those of the total non-thermal emission. For that purpose, we solve an one-dimensional stationary transport equation for the isotropic differential number density of the electrons. Results. We find that the difference between the spectra of filament and total non-thermal emission above 1 keV is more pronounced in the damping model than in the energy-loss model. Conclusions. A considerable damping of the magnetic field can result in an observable difference between the spectra of filament and total non-thermal emission, thus potentially permitting an observational discrimination between the energy-loss model and the damping model of the X-ray filaments.

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