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首页> 外文期刊>The Astrophysical Journal. Supplement Series >The integrated diffuse X-ray emission of the Carina Nebula compared to other massive star-forming regions
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The integrated diffuse X-ray emission of the Carina Nebula compared to other massive star-forming regions

机译：与其他大质量恒星形成区域相比，Carina星云的综合散射X射线发射

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The Chandra Carina Complex Project (CCCP) has shown that the Carina Nebula displays bright, spatially-complex soft diffuse X-ray emission. Here, we "sum up" the CCCP diffuse emission work by comparing the global morphology and spectrum of Carina's diffuse X-ray emission to other famous sites of massive star formation with pronounced diffuse X-ray emission: M17, NGC 3576, NGC 3603, and 30 Doradus. All spectral models require at least two diffuse thermal plasma components to achieve adequate spectral fits, a softer component with kT = 0.2-0.6 keV and a harder component with kT = 0.5-0.9 keV. In several cases these hot plasmas appear to be in a state of non-equilibrium ionization that may indicate recent and current strong shocks. A cavity north of the embedded giant H II region NGC 3576 is the only region studied here that exhibits hard diffuse X-ray emission; this emission appears to be nonthermal and is likely due to a recent cavity supernova, as evidenced by a previously-known pulsar and a newly-discovered pulsar wind nebula also seen in this cavity. All of these targets exhibit X-ray emission lines that are not well modeled by variable-abundance thermal plasmas and that might be attributed to charge exchange at the shock between the hot, tenuous, X-ray-emitting plasma and cold, dense molecular material; this is likely evidence for dust destruction at the many hot/cold interfaces that characterize massive star-forming regions.
机译：Chandra Carina复杂项目（CCCP）显示，Carina星云显示明亮，空间复杂的软X射线辐射。在这里，我们通过比较Carina漫射X射线的总体形态和光谱与其他具有明显漫射X射线的著名大质量恒星形成地点的比较来“总结” CCCP漫射工作：M17，NGC 3576，NGC 3603，和30只Doradus。所有光谱模型都需要至少两个扩散热等离子体成分才能实现足够的光谱拟合，其中kT = 0.2-0.6 keV的较软组分和kT = 0.5-0.9 keV的较硬组分。在某些情况下，这些热等离子体似乎处于非平衡电离状态，这可能表明最近和当前发生了强烈电击。埋入的巨型H II区NGC 3576以北的空腔是这里研究的唯一表现出硬扩散X射线发射的区域。这种辐射似乎是非热辐射，并且可能是由于最近的腔超新星引起的，正如先前在该腔中发现的脉冲星和新发现的脉冲星风星云所证明的那样。所有这些目标的X射线发射谱线都无法通过可变丰度的热等离子体很好地建模，并且可能归因于热的，脆弱的，发射X射线的等离子体与冷的致密分子材料之间在冲击时的电荷交换;这很可能是许多热/冷界面处尘埃破坏的证据，这些界面是大量恒星形成区域的特征。

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