Boosted Schwarzschild metrics from a Kerr–Schild perspective
Boosted Schwarzschild metrics from a Kerr–Schild perspective
复制标题
从 KerrâSchild 角度提升 Schwarzschild 指标
DOI：
10.1088/1361-6382/aaa18e
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发表时间：
2018
影响因子：
3.5
通讯作者：
Winicour, Jeffrey
中科院分区：
文献类型：
--
作者：
Mädler, Thomas;Winicour, Jeffrey
史瓦西度规的克尔-席德版本包含一个闵可夫斯基背景，它提供了一个增强黑洞的定义。有两个对应于传入或传出原则零方向的Kerr-Schild版本。我们发现，这两个相应的闵可夫斯基背景和他们相关的提升有一个意想不到的差异。我们分析了这种差异，并讨论了在非线性制度的引力记忆效应所产生的大质量粒子从一个孤立的系统喷射的影响。我们表明，非线性效应同意的线性化的结果的基础上推迟绿色函数，只有当喷射粒子的速度对应于一个推进对称性的输入Minkowski背景。传出的闵可夫斯基背景的增强与过去零无限中没有进入的辐射不一致。
The Kerr–Schild version of the Schwarzschild metric contains a Minkowski background which provides a definition of a boosted black hole. There are two Kerr–Schild versions corresponding to ingoing or outgoing principle null directions. We show that the two corresponding Minkowski backgrounds and their associated boosts have an unexpected difference. We analyze this difference and discuss the implications in the nonlinear regime for the gravitational memory effect resulting from the ejection of massive particles from an isolated system. We show that the nonlinear effect agrees with the linearized result based upon the retarded Green function only if the velocity of the ejected particle corresponds to a boost symmetry of the ingoing Minkowski background. A boost with respect to the outgoing Minkowski background is inconsistent with the absence of ingoing radiation from past null infinity.