论文标题
相干引力波形和来自宇宙弦循环的内存
Coherent Gravitational Waveforms and Memory from Cosmic String Loops
论文作者
论文摘要
我们首次构造了时间域重力波应变波形，这是在完全相对论中强烈引力的Abelian Higgs宇宙弦乐环的崩溃中构造的。我们表明，该应变在合并期间表现出很大的记忆效果，以突发结束，并且形成了黑洞的特征性响声。此外，我们研究了发出的波形和能量作为弦宽，环半径和弦张力$gμ$的函数。我们发现，质量归一化的引力波能表现出很大的依赖性，对字符串张力的倒数$ e _ {\ mathrm {gw}}}/m_0 \ propto 1/gμ$，$ e _ {\ mathrm {\ mathrm {gw}}}}}}}}}}/m_0 \ sim sim { $gμ\ gtrsim10^{ - 3} $。相反，我们表明效率仅微弱取决于初始字符串宽度和初始环半径。使用这些结果，我们认为重力波的产生主要由运动学而不是几何考虑。
We construct, for the first time, the time-domain gravitational wave strain waveform from the collapse of a strongly gravitating Abelian Higgs cosmic string loop in full general relativity. We show that the strain exhibits a large memory effect during merger, ending with a burst and the characteristic ringdown as a black hole is formed. Furthermore, we investigate the waveform and energy emitted as a function of string width, loop radius and string tension $Gμ$. We find that the mass normalized gravitational wave energy displays a strong dependence on the inverse of the string tension $E_{\mathrm{GW}}/M_0\propto 1/Gμ$, with $E_{\mathrm{GW}}/M_0 \sim {\cal O}(1)\%$ at the percent level, for the regime where $Gμ\gtrsim10^{-3}$. Conversely, we show that the efficiency is only weakly dependent on the initial string width and initial loop radii. Using these results, we argue that gravitational wave production is dominated by kinematical instead of geometrical considerations.
