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arXiv 1709.09592gr-qchep-th
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来自各向异性流体的非奇异黑洞、虫洞和de Sitter核

Nonsingular black holes, wormholes, and de Sitter cores from anisotropic fluids

C. Menchon, Gonzalo J. Olmo, D. Rubiera-Garcia

摘要:

本文研究了在静态球对称背景下,各向异性流体与Born-Infeld引力耦合的问题。选择表征流体的自由函数是基于以下理由:i)在大距离上恢复GR的Reissner-Nordström解,ii)满足经典能量条件,iii)包含非线性电动力学模型作为特定示例。根据引力和物质扇区上两个参数的符号,得到了四个分支的解。在每一个分支上,我们详细讨论了相应解的最内层区域的修改,它提供了大量的组态,包括非奇异的黑洞和裸天体,虫洞和de Sitter核。根据测地线的完备性和曲率标量的性质,讨论了这些构形的正则性。

英文摘要:

We study Born-Infeld gravity coupled to an anisotropic fluid in a static, spherically symmetric background. The free function characterizing the fluid is selected on the following grounds: i) recovery of the Reissner-Nordström solution of GR at large distances, ii) fulfillment of classical energy conditions and iii) inclusion of models of nonlinear electrodynamics as particular examples. Four branches of solutions are obtained, depending on the signs of two parameters on the gravity and matter sectors. On each branch, we discuss in detail the modifications on the innermost region of the corresponding solutions, which provides a plethora of configurations, including nonsingular black holes and naked objects, wormholes and de Sitter cores. The regular character of these configurations is discussed according to the completeness of geodesics and the behaviour of curvature scalars.

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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