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首页> 外文期刊>The Astrophysical Journal. Supplement Series >The Chandra Carina Complex Project: Deciphering the enigma of Carina's diffuse X-ray emission
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The Chandra Carina Complex Project: Deciphering the enigma of Carina's diffuse X-ray emission

机译：Chandra Carina复杂项目：解读Carina的漫射X射线发射之谜

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摘要

We present a 1.42 deg~2 mosaic of diffuse X-ray emission in the Great Nebula in Carina from the Chandra X-ray Observatory Advanced CCD Imaging Spectrometer camera. After removing >14,000 X-ray point sources from the field, we smooth the remaining unresolved emission, tessellate it into segments of similar apparent surface brightness, and perform X-ray spectral fitting on those tessellates to infer the intrinsic properties of the X-ray-emitting plasma. By modeling faint resolved point sources, we estimate the contribution to the extended X-ray emission from unresolved point sources and show that the vast majority of Carina's unresolved X-ray emission is truly diffuse. Line-like correlated residuals in the X-ray spectral fits suggest that substantial X-ray emission is generated by charge exchange at the interfaces between Carina's hot, rarefied plasma and its many cold neutral pillars, ridges, and clumps.
机译：我们从钱德拉X射线天文台先进CCD成像光谱仪相机中，看到了Carina大星云中1.42度〜2的弥散X射线发射马赛克。从野外去除了超过14,000个X射线点源后，我们将剩余的未分辨发射物平滑化，将其细分为具有相似表观表面亮度的片段，然后对这些细分进行X射线光谱拟合以推断X射线的固有属性发射等离子体。通过对微弱的分辨点源进行建模，我们估计了未分辨点源对扩展X射线发射的贡献，并显示了Carina的大部分未分辨X射线发射确实是弥散的。 X射线光谱拟合中的线状相关残差表明，大量的X射线发射是通过Carina热的稀疏等离子体与其许多冷的中性柱，脊和团块之间的界面处的电荷交换产生的。

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