Global Distribution of Ionizing and Recombining Plasmas in the Supernova Remnant G290.1$-$0.8
Global Distribution of Ionizing and Recombining Plasmas in the Supernova Remnant G290.1$-$0.8
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DOI：
10.1093/pasj/psu149
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发表时间：
2014-11
期刊：
影响因子：
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通讯作者：
F. Kamitsukasa;K. Koyama;H. Uchida;H. Nakajima;K. Hayashida;K. Mori;S. Katsuda;H. Tsunemi
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文献类型：
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作者：
F. Kamitsukasa;K. Koyama;H. Uchida;H. Nakajima;K. Hayashida;K. Mori;S. Katsuda;H. Tsunemi
我们报告朱雀的混合形态超新星遗迹（SNR）G290.1$-0.8美元（MSH 11- 61 A）的结果。信噪比具有向东南和西北延伸的不对称结构。在X射线光谱的中心和西北地区，我们发现重组等离子体的功能与强Si Ly$\alpha$和辐射复合连续在$\sim $2.7千电子伏。这些功能是最重要的西北地区，和光谱很好地再现与重组等离子体的$kT_{\rm e} = 0.5$ keV。而其它区域的光谱则用kT_{\rm e} = 0.6$ keV的电离等离子体来表示。重组等离子体具有超过太阳的丰度，而电离等离子体具有大致太阳的丰度。因此，它们可能是喷出物和星际介质（ISM）的起源，分别。在G290.1$-0.8 $西北部的重组等离子体可能是由超新星喷出物从高密度的星周介质向低密度的ISM爆发而产生的。
We report on the Suzaku results of the mixed-morphology supernova remnant (SNR) G290.1$-$0.8 (MSH 11-61A). The SNR has an asymmetric structure extended to the southeast and the northwest. In the X-ray spectra of the center and the northwest regions, we discover recombining plasma features with the strong Si Ly$\alpha$ and radiative recombination continuum at $\sim$ 2.7 keV. These features are the most significant in the northwest region, and the spectra are well-reproduced with a recombining plasma of $kT_{\rm e} = 0.5$ keV. Whereas the spectra of other regions are expressed by an ionizing plasma of $kT_{\rm e} = 0.6$ keV. The recombining plasma has over-solar abundances, while the ionizing plasma has roughly solar abundances. Hence they are likely ejecta and interstellar medium (ISM) origin, respectively. The recombining plasma in the northwest of G290.1$-$0.8 would be generated by a break-out of the supernova ejecta from a high density circumstellar medium to a low density ISM.