用朱雀观察船尾座A的X射线发射喷出物
X-ray Emitting Ejecta in Puppis A Observed with Suzaku
摘要：
利用朱雀X射线成像光谱仪对银河系超新星船尾座A的中、东部进行了5次观测，发现了船尾座A中的发射X射线的喷出物。一个大约3'5'，双峰区在北部中心被发现是高度富集硅和其他元素相对于其余的残余。另外，X射线拟合丰度远低于太阳值。虽然喷射物增强区域显示出相对元素丰度的一些变化，但几乎没有证据表明在遗迹的成像部分中一种元素比其他元素有非常强烈的增强，除了可能在遗迹南部中心的O和Ne增强区域。有没有空间之间的相关性紧凑[O III]发射喷出物结看到光学和X射线中看到的丰度增强，虽然它们位于同一附近。拟合柱密度图显示了残留物上的强烈变化，这与早期的X射线光谱硬度图相呼应。电离年龄（适用于单一温度模型）是急剧上升的山脊后面的东北-东部边界的残留物，并可能与沿该边界的强分子云相互作用。相比之下，温度图显示的变化相对较弱。
英文摘要：
We report the detection and localization of X-ray emitting ejecta in the middle-aged Galactic supernova remnant Puppis A using five observations with the Suzaku X-ray Imaging Spectrometer to survey the eastern and middle portions of the remnant. A roughly 3' by 5', double-peaked region in the north center is found to be highly enriched in Si and other elements relative to the rest of the remnant. The X-ray fitted abundances are otherwise well below the solar values. While the ejecta-enhanced regions show some variation of relative element abundances, there is little evidence for a very strong enhancement of one element over the others in the imaged portion of the remnant, except possibly for a region of O and Ne enhancement in the remnant's south center. There is no spatial correlation between the compact [O III] emitting ejecta knots seen optically and the abundance enhancements seen in X-rays, although they are located in the same vicinity. The map of fitted column density shows strong variations across the remnant that echo earlier X-ray spectral hardness maps. The ionization age (as fitted for single temperature models) is sharply higher in a ridge behind the northeast-east boundary of the remnant, and is probably related to the strong molecular cloud interaction along that boundary. The temperature map, by comparison, shows relatively weak variations.
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