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arXiv 2407.01385gr-qc
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经历宇宙学膨胀的事件视界“防火墙”

An Event Horizon 'Firewall' Undergoing Cosmological Expansion

R N Henriksen, A G Emslie

AI总结:

本文研究膨胀宇宙中奇异视界结构,揭示其温度、压强与曲率奇点及光前锋传播特性,并说明前方观测者可得到与观测一致的哈勃-勒梅特常数。

摘要:

我们将一个具有奇异视界结构的天体嵌入一个膨胀的、球对称的、均匀的且具有正宇宙学常数的宇宙中,该结构类似于黑洞事件视界,但除极限情形外与黑洞事件视界有根本区别。文中讨论了共形表示。在视界处存在温度/压强奇点以及相应的标量曲率奇点。膨胀的奇异视界最终包围整个时空流形。在此之前有一个膨胀的光前锋,它将已受奇点影响的时空与尚未受影响的时空分隔开。位于光前锋前方适当位置的观测者可以测得与当前观测值一致的哈勃-勒梅特常数。

英文摘要:

We embed an object with a singular horizon structure, reminiscent of (but fundamentally different from, except in a limiting case) a black-hole event horizon, in an expanding, spherically symmetric, homogeneous, Universe that has a positive cosmological constant. Conformal representation is discussed. There is a temperature/pressure singularity and a corresponding scalar curvature singularity at the horizon. The expanding singular horizon ultimately bounds the entire space-time manifold. It is is preceded by an expanding light front, which separates the space-time affected by the singularity from that which is not yet affected. An appropriately located observer in front of the light front can have a Hubble-Lemaître constant that is consistent with that currently observed.

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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