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arXiv 2001.08745gr-qc
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多信使事件后膜世界中的引力波

Gravitational waves in braneworlds after multi-messenger events

Miguel A. García-Aspeitia, Celia Escamilla-Rivera

摘要:

GW 170817事件打开了一个新的窗口,以测试对广义相对论的修改,目的是放弃或在额外维度的引力理论中施加强约束。在这些理论中,Randall-Sundrum膜世界理论-- 4+1时空模型,其协变的爱因斯坦场方程由来自额外维度的新额外项组成--开始在多信使天文学领域得到检验。在同样的背景下,本文的目的是通过测量引力和电磁信号之间的时间延迟施加新的约束:GW 170817和最近的S190425 z,在这个修改后的模型的自由宇宙学参数。我们假设引力波沿着额外维度上的一条捷径传播。此外,我们认为标准的$Λ$ CDM模型和执行的可能性分析,以研究的效果,如$H_0$张力相比,这个额外的维理论,获得减少$H_0$值的顺序$0.2\%$在这个理论的低能量极限。

英文摘要:

The GW170817 event opened a new window to test modifications to General Relativity with the aim of discard or impose strong constraints in extra dimension theories of gravity. Concerning these theories, the Randall-Sundrum brane-world theory -- 4+1 spacetime model where its covariant Einstein field equations are composed with new extra terms that comes from extra dimensions -- is begin tested in the multi-messenger astronomy field. In the same context, the aim of this paper is to impose new constrictions through measurements of the time-delay between the gravitational and electromagnetic signals: GW170817 and the recent S190425z, over the free cosmological parameters of this modified model. We assume that Gravitational Waves travel along a shortcut on the extra dimension. In addition, we consider the standard $Λ$CDM model and perform a likelihood analysis in order to study effects like the $H_0$ tension in comparison to this extra-dimensional theory, obtaining a reduced $H_0$ value of the order of $0.2\%$ in the low energy limit of this theory.

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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