论文标题
与宇宙弦乐网络产生的随机引力背景的完全分析近似
Full analytical approximation to the stochastic gravitational wave background generated by cosmic string networks
论文作者
论文摘要
我们得出了由宇宙弦网络整个宇宙学演化产生的随机重力波背景的完整分析近似。我们表明，这种近似不仅可以准确地预测辐射时代高原的幅度，而且还可以很好地适合高频截止，以及在物质时代衰减的环产生的低频峰，而不论宇宙弦乐张力和回路的长度。然后，我们发现它对相关频率范围内的完整随机重力波背景提供了良好的定量描述。
We derive a full analytical approximation to the stochastic gravitational wave background generated by the loops that are produced throughout the cosmological evolution of cosmic string networks. We show that this approximation not only predicts the amplitude of the radiation-era plateau exactly, but also provides a good fit to the high-frequency cut-off and to the low-frequency peak generated by the loops that decay during the matter era, irrespective of cosmic string tension and of the length of loops created. We then find that it provides a good quantitative description of the full stochastic gravitational wave background across the relevant frequency range.
