论文标题
与超新星残留G359.1-0.5相关的极端封闭等离子的均匀分布
Uniform distribution of the extremely overionized plasma associated with the supernova remnant G359.1-0.5
论文作者
论文摘要
我们报告了我们对超新星残留物（SNR）G359.1 $ - $ 0.5和相互作用的CO云的特殊重组等离子体的详细分析结果。结合{\ it chandra}和{\ it suzaku}数据，我们估计了等离子体的电离状态，并仔细处理了背景频谱。平均光谱显示出与初始温度（$> $> $ 16 keV）的电子温度（$ \ sim $ 0.17 keV）的偏差相当大，这表明血浆处于高度重组的优势状态。另一方面，重组时间表$（{\ it n _ {\ rm e} t}）$可与其他重组SNR（$ \ sim4.2 \ times 10^{11}} $ cm $^{ - 3} $ s）相当。我们还搜索了血浆参数的空间变化，但没有发现显着差异。 使用$^{12} $ co（$ j $ = 2--1）数据，我们找到了一个新的，合理的互动Co云的候选者，该候选者的视线速度为$ \ sim-$ \ $ 20 km S $^{ - 1} $。这表明SNR位于$ \ sim $ 4 kpc的距离，这是银河中心的前景，如前所述。相关的CO云与附近的GEV/TEV排放没有明显的空间巧合，这表明GEV/TEV排放的起源很可能与G359.1 $ - $ 0.5无关。
We report on the results of our detailed analyses on the peculiar recombining plasma of the supernova remnant (SNR) G359.1$-$0.5, and the interacting CO clouds. Combining {\it Chandra} and {\it Suzaku} data, we estimated the ionization state of the plasma with a careful treatment of the background spectrum. The average spectrum showed a remarkably large deviation of the electron temperature ($\sim$0.17 keV) from the initial temperature ($>$ 16 keV), indicating that the plasma is in a highly recombination-dominant state. On the other hand, the recombination timescale $({\it n_{\rm e} t})$ is comparable to those of the other recombining SNRs ($\sim4.2 \times 10^{11}$ cm$^{-3}$ s). We also searched for spatial variation of the plasma parameters, but found no significant differences. Using $^{12}$CO($J$=2--1) data obtained with NANTEN2, we found a new, plausible candidate for the interacting CO cloud, which has a line-of-sight velocity of $\sim -$20 km s$^{-1}$. This indicates that the SNR is located at a distance of $\sim$4 kpc, which is the foreground of the Galactic center, as previously reported. The associated CO cloud does not show clear spatial coincidence with the nearby GeV/TeV emission, indicating that the origins of the GeV/TeV emission are likely unrelated to G359.1$-$0.5.
