朱雀号观测到的疏散星团Westerlund 2的X射线散射：一个超新星遗迹？
Suzaku Observation of the Diffuse X-Ray Emission from the Open Cluster Westerlund 2: a Hypernova Remnant?
摘要：
我们分析了朱雀观测的年轻疏散星团Westerlund 2，它充满了弥漫的X射线发射。我们发现，发射由三个热分量或两个热和一个非热分量。非热分量的能流上限小于用H.E.S. S观测到的TeV带的能流上限。这可能表明活跃的粒子加速在这个集群中已经停止，并且加速的电子已经冷却。用H.E.S.S.很可能来自高能质子，与电子相比，质子很难冷却。弥漫的X射线气体中的金属丰度可能表明过去有一颗大质量恒星爆炸过。
英文摘要：
We present the analysis of Suzaku observations of the young open cluster Westerlund 2, which is filled with diffuse X-ray emission. We found that the emission consists of three thermal components or two thermal and one non-thermal components. The upper limit of the energy flux of the non-thermal component is smaller than that in the TeV band observed with H.E.S.S. This may indicate that active particle acceleration has stopped in this cluster, and that the accelerated electrons have already cooled. The gamma-ray emission observed with H.E.S.S. is likely to come from high-energy protons, which hardly cool in contrast with electrons. Metal abundances of the diffuse X-ray gas may indicate the explosion of a massive star in the past.
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