Cosmological solutions with charged black holes

Cosmological solutions with charged black holes
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带电黑洞的宇宙学解决方案

DOI:
10.1007/s10714-017-2261-4
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发表时间:
2017
影响因子:
2.8
通讯作者:
Bibi R
Bibi R
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Bibi R

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考虑了包含多个带电黑洞的爱因斯坦-麦克斯韦方程组的宇宙学解的构造问题。通过将场方程看作一组约束方程和演化方程,我们构造了超球上N个荷电黑洞的精确初值。这对应于宇宙学解的最大膨胀,并为唯一的演化提供了足够的信息。然后,我们考虑一个包含八个带电黑洞的宇宙的具体例子,并表明非零电荷的存在减少了空间的宇宙学区域的尺度。这些解将Majumdar-Papapetrou解从带电黑洞的极端极限推广开来,并提供了我们认为是电荷对宇宙学反反应影响的第一个相对论计算。
We consider the problem of constructing cosmological solutions of the Einstein–Maxwell equations that contain multiple charged black holes. By considering the field equations as a set of constraint and evolution equations, we construct exact initial data forNcharged black holes on a hypersphere. This corresponds to the maximum of expansion of a cosmological solution, and provides sufficient information for a unique evolution. We then consider the specific example of a universe that contains eight charged black holes, and show that the existence of non-zero electric charge reduces the scale of the cosmological region of the space. These solutions generalize the Majumdar–Papapetrou solutions away from the extremal limit of charged black holes, and provide what we believe to be some of the first relativistic calculations of the effects of electric charge on cosmological backreaction.
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