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arXiv 0912.2809gr-qcastro-ph.COhep-th
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膨胀宇宙中的黑洞

Black Holes in an Expanding Universe

Gary W. Gibbons, Kei-ichi Maeda

摘要:

本文给出了膨胀宇宙中黑洞的一个精确解,其中黑洞是最大荷电的,宇宙是以任意状态方程膨胀的。它是Einstein-scalar-Maxwell系统的一个精确解,其中我们有两个Maxwell型U(1)场耦合到标量场。标量场的势是指数的。我们找到了一个正则视界,它依赖于一个参数(U(1)场的能量密度与标量场的能量密度之比)。视界是静态的,这是因为作用在标量场上的引力吸引力和U(1)排斥力在视界上保持平衡。我们还计算了黑洞的温度。

英文摘要:

An exact solution representing black holes in an expanding universe is found. The black holes are maximally charged and the universe is expanding with arbitrary equation of state. It is an exact solution of the Einstein-scalar-Maxwell system, in which we have two Maxwell-type U(1) fields coupled to the scalar field. The potential of the scalar field is an exponential. We find a regular horizon, which depends on one parameter (the ratio of the energy density of U(1) fields to that of the scalar field). The horizon is static because of the balance on the horizon between gravitational attractive force and U(1) repulsive force acting on the scalar field. We also calculate the black hole temperature.

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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