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arXiv 2406.11299gr-qcastro-ph.HE
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膨胀宇宙中的 Proca

Proca in an Expanding Universe

Shaun David Brocus Fell, Lavinia Heisenberg

AI总结:

本文将宇宙学常数纳入 Einstein+Proca 系统,并用 GRBoondi 数值模拟发现正 Λ 会使超辐射矢量场由增长转为衰减。

摘要:

旋转黑洞时空中大质量矢量场的超辐射增长近年来在文献中受到了广泛关注。然而,这些研究大多忽略了宇宙学常数的影响,而宇宙学常数很可能构成了我们宇宙的主要能量成分。本文将宇宙学常数纳入 Einstein+Proca 系统,并对所得运动方程进行数值演化,从而拓展了近期研究。利用新发布的、专为数值演化(广义)Proca 场而设计的 GRBoondi 数值相对论代码,我们发现,在 Λ=0 情形下导致增长不稳定性的参数,在 Λ>0 时会转变为衰减状态。这带来了更有趣的现象学。这些模拟为未来开展完整 Einstein+Proca 模拟、探索所形成云团因引力辐射而发生的长期衰减铺平了道路。

英文摘要:

The superradiant growth of massive vector fields in rotating black hole spacetimes has garnered significant attention in recent literature. However, the majority of these studies overlook the influence of a cosmological constant, which likely constitutes the primary energy content of our universe. In this paper, we extend recent research by incorporating a cosmological constant into the Einstein+Proca system and numerically evolving the resulting equations of motion. Utilizing the newly released GRBoondi numerical relativity code, designed specifically for the numerical evolution of (generalized) Proca fields, we discover that parameters causing a growing instability in the $Λ= 0$ scenario transition to a decaying state when $Λ> 0$. This results in a more intriguing phenomenology. These simulations pave the way for future full Einstein+Proca simulations to explore the secular decay of the resultant cloud from gravitational emission.

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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