用隐马尔可夫模型搜索HESS ~ J1427-608中的连续引力波
Search for continuous gravitational waves from HESS~J1427-608 with a hidden Markov model
摘要：
我们提出了一个搜索的连续引力波信号，从一个身份不明的脉冲星可能供电HESS~J1427-608，一个空间未分辨TeV的点源检测的高能立体系统（HESS）。搜索使用半相干算法，该算法将最大似然$\mathcal{F}$ ~统计与隐马尔可夫模型相结合，以有效地检测和跟踪在频率上随机漂移的准单色信号。它使用了高级激光干涉仪引力波天文台第二次观测运行的数据。HESS源的多波长观测与TeV明亮脉冲星风星云的人口的属性相结合，以约束搜索参数。我们没有发现这个目标发出引力波的证据。我们在样本子带中以$95\%$置信水平设置特征波应变$h_0^{95\%}$（对于圆偏振信号）的上限，并对其进行插值以估计全波段的灵敏度。我们发现$h_0^{95\%} = 1.3\times 10^{-25}$在185 Hz附近。对椭圆率和\textit{r}模振幅的隐含约束在200 Hz处分别达到$ε\leq 10^{-5}$和$α\leq 10^{-3}$.
英文摘要：
We present a search for continuous gravitational wave signals from an unidentified pulsar potentially powering HESS~J1427-608, a spatially unresolved TeV point source detected by the High Energy Stereoscopic System (HESS). The search uses a semi-coherent algorithm, which combines the maximum likelihood $\mathcal{F}$~statistic with a hidden Markov model to efficiently detect and track quasi-monochromatic signals that wander randomly in frequency. It uses data from the second observing run of the Advanced Laser Interferometer Gravitational-Wave Observatory. Multi-wavelength observations of the HESS source are combined with the proprieties of the population of TeV-bright pulsar wind nebulae to constrain the search parameters. We find no evidence of gravitational wave emission from this target. We set upper limits on the characteristic wave strain $h_0^{95\%}$ (for circularly polarized signals) at $95\%$ confidence level in sample sub-bands and interpolate it to estimate the sensitivity in the full band. We find $h_0^{95\%} = 1.3\times 10^{-25}$ near 185~Hz. The implied constraints on the ellipticity and \textit{r}-mode amplitude reach $ε\leq 10^{-5}$ and $α\leq 10^{-3}$ at 200~Hz, respectively.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
