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Search for stochastic gravitational-wave background from string cosmology with Advanced LIGO and Virgo's O1$\sim$O3 data
arXiv - PHYS - General Relativity and Quantum Cosmology Pub Date : 2023-02-08 , DOI: arxiv-2302.03846 Yang Jiang, Xi-Long Fan, Qing-Guo Huang
arXiv - PHYS - General Relativity and Quantum Cosmology Pub Date : 2023-02-08 , DOI: arxiv-2302.03846 Yang Jiang, Xi-Long Fan, Qing-Guo Huang
String cosmology models predict a relic background of gravitational-wave (GW)
radiation in the early universe. The GW energy spectrum of radiated power
increases rapidly with the frequency, and therefore it becomes a potential and
meaningful observation object for high-frequency GW detector. We focus on the
stochastic background generated by superinflation in string theory and search
for such signal in the observing data of Advanced LIGO and Virgo O1$\sim$O3
runs in a Bayesian framework. We do not find the existence of the signal, and
thus put constraints on the GW energy density. Our results indicate that at
$f=100\,\text{Hz}$, the fractional energy density of GW background is less than
$1.7\times10^{-8}$ and $2.1\times10^{-8}$ for dilaton-string and dilaton only
cases respectively, and further rule out the parameter space restricted by the
model itself due to the non-decreasing dilaton and stable cosmology background
($\beta$ bound).
中文翻译:
使用 Advanced LIGO 和 Virgo 的 O1$\sim$O3 数据从弦宇宙学中搜索随机引力波背景
弦宇宙学模型预测了早期宇宙中引力波 (GW) 辐射的遗迹背景。辐射功率的引力波能谱随频率快速增加,因此成为高频引力波探测器潜在的、有意义的观测对象。我们关注弦理论中超膨胀产生的随机背景,并在贝叶斯框架下运行的 Advanced LIGO 和 Virgo O1$\sim$O3 的观测数据中寻找这种信号。我们没有发现信号的存在,因此对 GW 能量密度施加了限制。我们的结果表明,在 $f=100\,\text{Hz}$ 时,GW 背景的分数能量密度小于 $1.7\times10^{-8}$ 和 $2.1\times10^{-8}$ 对于膨胀- string 和 dilaton 分别只有情况,
更新日期:2023-02-09
中文翻译:
使用 Advanced LIGO 和 Virgo 的 O1$\sim$O3 数据从弦宇宙学中搜索随机引力波背景
弦宇宙学模型预测了早期宇宙中引力波 (GW) 辐射的遗迹背景。辐射功率的引力波能谱随频率快速增加,因此成为高频引力波探测器潜在的、有意义的观测对象。我们关注弦理论中超膨胀产生的随机背景,并在贝叶斯框架下运行的 Advanced LIGO 和 Virgo O1$\sim$O3 的观测数据中寻找这种信号。我们没有发现信号的存在,因此对 GW 能量密度施加了限制。我们的结果表明,在 $f=100\,\text{Hz}$ 时,GW 背景的分数能量密度小于 $1.7\times10^{-8}$ 和 $2.1\times10^{-8}$ 对于膨胀- string 和 dilaton 分别只有情况,