引力波的“中微子雾”：来自超新星中微子记忆的随机引力波背景
A "Neutrino Fog" For Gravitational Waves: The Stochastic Gravitational Wave Background from Supernova Neutrino Memory
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中文总结 AI 辅助
该研究通过三维超新星模拟建模，揭示超新星中微子记忆产生的随机引力波背景的两个成分，指出记忆成分的探测前景最佳，其能量密度或影响宇宙学信号搜寻。
中文摘要 AI 辅助
来自未分辨源的引力波，即随机引力波背景（SGWBs），携带着其多样源背后物理的珍贵信息，是未来实验搜寻的重要目标。本文对来自核心坍缩超新星的SGWB进行建模，利用大量先进的三维、持续数秒的超新星模拟，表征该背景的两个主要成分：其一为频率f~10^-2 - 1赫兹，源于各向异性中微子发射（即引力波记忆）；其二为频率f≳10^2赫兹，来自近核物质动力学。研究发现，记忆成分的探测前景最佳，因其在f~0.1赫兹处的特征峰值处于未来空间探测器的可及范围内，该峰值处的能量密度可能与慢滚暴胀及可能的宇宙学遗迹的背景能量密度相当，从而可能影响对这些重要信号的搜寻。
英文摘要
Gravitational waves originating from unresolved sources, or stochastic gravitational wave backgrounds (SGWBs), carry precious information about the physics underlying their diverse sources, and represent an important target for future experimental searches. Here, we model the SGWB due to core collapse supernovae. Using an extensive collection of state-of-the-art, three-dimensional, multi-second supernova simulations, we characterize the two main components of this background: one at $f \sim 10^{-2} - 1$ Hz, due to anisotropic neutrino emission (the gravitational wave memory); the other at $f \gtrsim 10^{2}$ Hz, from the near-core matter dynamics. We find that the memory component offers the best prospects of detection, as its characteristic peak at $f\sim 0.1$ Hz is within the reach of future space-born detectors. At the peak, the energy density might be comparable to that of backgrounds from slow roll inflation and from possible cosmological relics, thus potentially impacting searches of these important signals.
