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arXiv 1202.4296gr-qcastro-ph.CO
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球对称类Rindler时空的含时嵌入

Time dependent embedding of spherically symmetric Rindler-like spacetime

Hristu Culetu

摘要:

研究了具有径向热通量的各向异性宇宙流体,该流体具有依赖于时间的类Rindler几何。即使它的能量密度$ρ$为正,径向和横向压力为负,不满足强能量条件。“静态”观测者的全等不是测地线,热通量是向外的。我们计算了与嵌入在空间平坦FLRW宇宙中的Rindler型度规相关的Misner-Sharp能量,发现由于时空的共形平坦形式,Weyl能量正在消失。计算零测地线展开,发现两个视视界中只有一个位于事件视界内。研究了嵌入共形平坦de Sitter时空中的Rindler类几何的性质。

英文摘要:

An anisotropic cosmic fluid with radial heat flux which sources a time dependent Rindler-like geometry is investigated. Even though its energy density $ρ$ is positive, the radial and transversal pressures are negative and the strong energy condition is not satisfied. The congruence of "static" observers is not geodesic and the heat flux is oriented outward. We computed the Misner-Sharp energy associated with the Rindler-type metric embedded in a spatially flat FLRW universe and found that the Weyl energy is vanishing thanks to the conformally flat form of the spacetime. The null geodesic expansions are computed and one finds that only one of the two apparent horizons is located inside the event horizon. The properties of the Rindler-like geometry embedded in the conformally-flat de Sitter spacetime are investigated.

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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