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arXiv 2103.12178gr-qcmath-phmath.MP
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推广Birkhoff

Generalizing Birkhoff

Joel L. Weiner

摘要:

我们以下列方式推广伯克霍夫定理。我们发现的必要条件和充分条件,任何球对称时空是静态的应力能量张量的特征值。特别地,我们推广了Tolman-Oppenheimer-Schmidoff方程,并证明了Birkhoff定理在较弱的无压力假设下成立(关于适当的框架)。我们提供的方程,显示如何度量的系数与应力-能量张量的本征值。这些涉及的积分是这些特征值的简单函数。我们还确定所有静态球对称时空中的渐近平坦。几个例子利用的结果。计算是通过将时空视为扭曲的产物来完成的,并且计算是使用嘉当的移动框架方法来完成的。

英文摘要:

We generalize Birkhoff's Theorem in the following fashion. We find necessary and sufficient conditions for any spherically symmetric space-time to be static in terms of the eigenvalues of the stress-energy tensor. In particular, we generalize the Tolman-Oppenheimer-Volkoff equation and prove that Birkhoff's theorem holds under the weaker hypothesis of no pressure (with respect to an appropriate frame.) We provide equations that show how the coefficients of the metric relate to the eigenvalues of the stress-energy tensor. These involve integrals that are simple functions of those eigenvalues. We also determine among all static spherically symmetric space-times those that are asymptotically flat. A few examples are presented taking advantage of the results. The calculations are done by viewing the space-times as warped products and the computations are done using Cartan's moving frames approach.

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