News from critical collapse: Bondi mass, tails, and quasinormal modes
News from critical collapse: Bondi mass, tails, and quasinormal modes
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来自临界坍缩的新闻：邦迪质量、尾部和拟正则模式
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
P. Aichelburg
中科院分区：
文献类型：
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作者：
M. Purrer;S. Husa;P. Aichelburg
我们讨论了视界形成阈值上的临界引力塌陷，作为讨论临界塌陷的全局方面和在紧凑的背景下进行数值研究的模型。对于我们的物质模型，我们选择了球对称的自引力无质量标量场，这在临界坍缩文献中已经得到了广泛的研究。我们的演化系统基于Bondi坐标，使用质量函数作为演化变量，以确保零无穷大处的正则性。我们计算了像Bondi质量和新闻函数这样的辐射量，发现它们反映了离散自相似(DSS)行为。令人惊讶的是，零无限远的辐射周期与质量迅速减小的黑洞的领先准正交模的形式结果有关。此外，我们的研究揭示了临界坍塌中的全局和局部问题，以及零无限的概念在预测探测器信号时的有效性和有用性。
We discuss critical gravitational collapse on the threshold of apparent horizon formation as a model both for the discussion of global aspects of critical collapse and for numerical studies in a compactified context. For our matter model we choose a self-gravitating massless scalar field in spherical symmetry, which has been studied extensively in the critical collapse literature. Our evolution system is based on Bondi coordinates, the mass-function is used as an evolution variable to ensure regularity at null infinity. We compute radiation quantities like the Bondi mass and news-function and find that they reflect the discretely self-similar (DSS) behavior. Surprisingly, the period of radiation at null infinity is related to the formal result for the leading quasinormal mode of a black hole with rapidly decreasing mass. Furthermore, our investigations shed some light on global versus local issues in critical collapse, and the validity and usefulness of the concept of null infinity when predicting detector signals.