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arXiv 0906.2787astro-ph.COastro-ph.HE
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星系团中AGN反馈的高分辨X射线光谱学展望

Prospects of High-Resolution X-ray Spectroscopy for AGN Feedback in Galaxy Clusters

S. Heinz, M. Brueggen, B. Morsony

摘要:

钱德拉时代的遗产之一是在几乎所有冷核星系团中发现了活动星系核膨胀的X射线空腔,其机械光度与星系团冷却速率相当或更大,这表明活动星系核可能是加热星系团的原因。这一发现提出了一系列新的问题,这些问题不能仅仅通过X射线成像或模型来解决:活动星系核是否真的负责停止冷却流?活动星系核的能量是如何转化为热能的?观察到的加热和冷却之间的平衡有多紧?使用数值模拟和一个新的虚拟X射线天文台工具,我们证明,高分辨率,高通量的X射线光谱可以解决这些问题,国际X射线天文台\ixo将有必要的能力,提供这些测量。

英文摘要:

One of the legacies of the {\rm Chandra} era is the discovery of AGN-inflated X-ray cavities in virtually all cool-core clusters, with mechanical luminosities comparable to or larger than the cluster cooling rate, suggesting that AGN might be responsible for heating clusters. This discovery poses a new set of questions that cannot be addressed by X-ray imaging or modeling alone: Are AGN actually responsible for halting cooling flows? How is the AGN energy transferred to heat? How tight is the observed balance between heating and cooling? Using numerical simulations and a new virtual X-ray observatory tool, we demonstrate that high-resolution, high-throughput X-ray spectroscopy can address these questions and that the International X-ray Observatory \ixo will have the necessary capabilities to deliver these measurements.

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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