HIGH-RESOLUTION X-RAY SPECTROSCOPY OF THE GALACTIC SUPERNOVA REMNANT PUPPIS A WITH XMM-NEWTON/RGS
HIGH-RESOLUTION X-RAY SPECTROSCOPY OF THE GALACTIC SUPERNOVA REMNANT PUPPIS A WITH XMM-NEWTON/RGS
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DOI：
10.1088/0004-637x/756/1/49
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发表时间：
2012-08
期刊：
影响因子：
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通讯作者：
S. Katsuda;H. Tsunemi;K. Mori;H. Uchida;R. Petre;S. Yamada;H. Akamatsu;S. Konami;T. Tamagawa-T.-Tamaga
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作者：
S. Katsuda;H. Tsunemi;K. Mori;H. Uchida;R. Petre;S. Yamada;H. Akamatsu;S. Konami;T. Tamagawa-T.-Tamaga
我们提出了高分辨率的X射线光谱的云激波相互作用的地区在东部和北方边缘的银河超新星遗迹船尾座A，使用的反射光栅光谱仪上的XMM-牛顿卫星。首次清晰地分辨出了包括类氦N、O和Ne的Kα三重谱线在内的多条发射谱线。被发现的三重态中的禁止共振线的强度比高于具有合理的等离子体参数的热发射模型的预测。异常线比不能再现的共振散射，复合，或内壳层电离过程的影响，但可以解释的电荷交换发射，应该出现在冷/暖云和热等离子体之间的界面。因此，我们的观察提供了观测支持的电荷交换X射线发射超新星遗迹。
We present high-resolution X-ray spectra of cloud–shock interaction regions in the eastern and northern rims of the Galactic supernova remnant Puppis A, using the Reflection Grating Spectrometer on board the XMM-Newton satellite. A number of emission lines including Kα triplets of He-like N, O, and Ne are clearly resolved for the first time. Intensity ratios of forbidden to resonance lines in the triplets are found to be higher than predictions by thermal emission models having plausible plasma parameters. The anomalous line ratios cannot be reproduced by effects of resonance scattering, recombination, or inner-shell ionization processes, but could be explained by charge-exchange emission that should arise at interfaces between the cold/warm clouds and the hot plasma. Our observations thus provide observational support for charge-exchange X-ray emission in supernova remnants.