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arXiv 1206.0660gr-qc
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Zipoy-Voorhees度量的不可积性

The non-integrability of the Zipoy-Voorhees metric

Georgios Lukes-Gerakopoulos

摘要:

像eLISA/NGO这样的低频引力波探测器将使我们有机会测试位于星系中心的超大质量致密天体是否确实是克尔黑洞。进行这种测试的一种方法是将引力波信号与受扰动的黑洞时空(即所谓的颠簸黑洞时空)的模板进行比较。Zipoy-Voorhees(ZV)时空(也被称为$γ$时空)可以被包括在颠簸的黑洞家族中,因为它可以被认为是史瓦西时空背景的扰动。有几位作者提出ZV度规对应于一个可积系统。与这个可积性猜想相反,本文通过数值例子表明,ZV一般属于非可积系统族。

英文摘要:

The low frequency gravitational wave detectors like eLISA/NGO will give us the opportunity to test whether the supermassive compact objects lying at the centers of galaxies are indeed Kerr black holes. A way to do such a test is to compare the gravitational wave signals with templates of perturbed black hole spacetimes, the so-called bumpy black hole spacetimes. The Zipoy-Voorhees (ZV) spacetime (known also as the $γ$ spacetime) can be included in the bumpy black hole family, because it can be considered as a perturbation of the Schwarzschild spacetime background. Several authors have suggested that the ZV metric corresponds to an integrable system. Contrary to this integrability conjecture, in the present article it is shown by numerical examples that in general ZV belongs to the family of non-integrable systems.

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