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arXiv 1109.6355astro-ph.SR
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不同化学成分行星状星云弥散X射线发射的模拟

Modeling the diffuse X-ray emission of Planetary Nebulae with different chemical composition

M. Steffen, C. Sandin, R. Jacob, D. Schoenberner

摘要:

基于含时辐射流体动力学模拟行星状星云(PNe)的演化过程,我们对具有封闭中心腔的PNe的弥散X射线发射如何依赖于星云的演化状态、中心恒星的质量以及星风和星周物质的金属丰度这一重要问题进行了系统的参数研究.我们还研究了模型预测如何依赖于中央“热泡”和“冷”内星云之间的界面处的热传导的处理,并将结果与最近的X射线观测结果进行了比较。我们的研究包括模型,其属性类似于PNE与沃尔夫-拉叶型中心恒星的极端情况。事实上,发现这样的模型产生最高的X射线亮度。

英文摘要:

Based on time-dependent radiation-hydrodynamics simulations of the evolution of Planetary Nebulae (PNe), we have carried out a systematic parameter study to address the non-trivial question of how the diffuse X-ray emission of PNe with closed central cavities is expected to depend on the evolutionary state of the nebula, the mass of the central star, and the metallicity of stellar wind and circumstellar matter. We have also investigated how the model predictions depend on the treatment of thermal conduction at the interface between the central `hot bubble' and the `cool' inner nebula, and compare the results with recent X-ray observations. Our study includes models whose properties resemble the extreme case of PNe with Wolf-Rayet type central stars. Indeed, such models are found to produce the highest X-ray luminosities.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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