论文标题
从Advanced Ligo-Virgo的前三个观察跑中搜索双峰和双峰重力波形光谱
Searching for double-peak and doubly broken gravitational-wave spectra from Advanced LIGO-Virgo's first three observing runs
论文作者
论文摘要
当前的Ligo-Virgo观察跑步一直在推动灵敏度极限以触摸随机重力波背景（SGWBS）。但是，迄今为止，对于任何单个主导的SGWB的源具有单个损坏的law（BPL）频谱，尚无明显检测。然而，它可以很好地摆脱现有的贝叶斯搜索，例如，有两个单独的BPL光谱（双峰案例）或一个具有幂律行为的单独的BPL Spectra（双峰情况）的可比较的主导源，在光谱中两次损坏（双重损坏的情况）。在本文中，我们对这两种情况提出了约束，但特别是针对宇宙学一阶相变的模型，该模型是从高级Ligo-Virgo的前三个观察过程中进行的。我们发现了对双峰案例的有力负面证据，因此位置为95 \％C.L.上限$ω__\ MATHRM {bpl，1} <5.8 \ times10^{ - 8} $和$ω__\ Mathrm {bpl，2} <4.4 \ times10^{ - 8} $在两个BPL光谱膨胀上与无分解的compartion blenary biary coteccention（CBC） $ω__\ MATHRM {CBC} <5.6 \ times10^{ - 9} $。我们进一步发现了双重破坏病的负面证据，因此位置为95 \％c.l.上限$ $ω__\ MATHRM {db} <1.2 \ times10^{ - 7} $在双重损坏的频谱的总幅度上相对于$ω__\ mathrm {cbc} <6.0 \ times10 \ times10 \ times10^{ - 9} $。尤其是，双峰案例的结果略有排除在Ligo-Virgo频段上强大的超冷却一阶相变。
The current LIGO-Virgo observing run has been pushing the sensitivity limit to touch the stochastic gravitational-wave backgrounds (SGWBs). However, no significant detection has been reported to date for any single dominated source of SGWBs with a single broken-power-law (BPL) spectrum. Nevertheless, it could equally well escape from existing Bayesian searches from, for example, two comparable dominated sources with two separate BPL spectra (double-peak case) or a single source with its power-law behavior in the spectrum broken twice (doubly broken case). In this paper, we put constraints on these two cases but specifically for the model with cosmological first-order phase transitions from Advanced LIGO-Virgo's first three observing runs. We found strong negative evidence for the double-peak case and hence place 95\% C.L. upper limits $Ω_\mathrm{BPL,1}<5.8\times10^{-8}$ and $Ω_\mathrm{BPL,2}<4.4\times10^{-8}$ on the two BPL spectra amplitudes with respect to the unresolved compact binary coalescence (CBC) amplitude $Ω_\mathrm{CBC}<5.6\times10^{-9}$. We further found weak negative evidence for the doubly broken case and hence place 95\% C.L. upper limit $Ω_\mathrm{DB}<1.2\times10^{-7}$ on the overall amplitude of the doubly broken spectrum with respect to $Ω_\mathrm{CBC}<6.0\times10^{-9}$. In particular, the results from the double-peak case have marginally ruled out the strong super-cooling first-order phase transitions at LIGO-Virgo band.
