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arXiv 2403.19552astro-ph.CO
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利用引力波探测暗宇宙

Probing the dark Universe with gravitational waves

Antonio Enea Romano

AI总结:

本文提出用依赖极化、频率和时间的等效速度来建模引力波与暗能量、暗物质的相互作用,并利用不同极化引力波的传播时间和光度距离在不同频率和红移处探测暗宇宙。

摘要:

引力波(GW)预期会与暗能量和暗物质发生相互作用,从而影响其在宇宙学尺度上的传播。为了对这一相互作用进行建模,我们推导出一个规范不变的等效方程和作用量,该方程对所有引力波极化均有效,其基础是将不同阶微扰下引力波相互作用的效应编码为一个依赖于极化、频率和时间的等效速度。微扰在时间相关共形变换下的不变性以及引力波的规范不变性,使得我们能够在任意共形相关框架中获得幺正规范等效作用量,从而清晰地揭示了爱因斯坦框架与约当框架之间的关系。不同引力波极化的传播时间和光度距离使得我们能够在不同频率和红移处探测暗宇宙,暗宇宙作为一种等效介质,其物理性质可以通过引力波的等效速度来建模。

英文摘要:

Gravitational waves (GW) are expected to interact with dark energy and dark matter, affecting their propagation on cosmological scales. In order to model this interaction, we derive a gauge invariant effective equation and action valid for all GWs polarizations, based on encoding the effects of the interaction of GWs at different order in perturbations, in a polarization, frequency and time dependent effective speed. The invariance of perturbations under time dependent conformal transformations and the gauge invariance of the GWs allow to obtain the unitary gauge effective action in any conformally related frame, making transparent the relation between Einstein and Jordan frame. The propagation time and luminosity distance of different GWs polarizations allow to probe at different frequencies and redshift the dark Universe, which act as an effective medium, whose physical properties can be modeled by the GWs effective speed.

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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