AI 中文总结
研究在LISA频段多种天体物理前景下利用GWBackFinder重建宇宙弦信号，发现重建张力误差$\lesssim 10\%$时所需$G\mu$值比无前景或仅考虑部分前景时大得多，此为系列研究第二篇，旨在量化LISA测量宇宙弦模型的能力。
AI 中文摘要
我们研究了在LISA频段存在所有主要已知天体物理前景的情况下，利用LISA重建传统宇宙弦信号。这些前景包括恒星起源黑洞双星（SOBHBs）、银河系（WDs）和河外星系（ExWDs）白矮星、极端质量比旋进（EMRIs）以及大质量黑洞双星（MBHBs）。使用基于模拟推理的GWBackFinder软件包，我们对LISA噪声、前景和信号进行联合推理，涵盖一系列注入的弦张力$G\mu$。我们发现，要将张力重建误差控制在$\lesssim 10\%$，所需的$G\mu$值高达$\gtrsim 10^{-11}$，即比无前景时的先前估计值大$\sim10^5$倍，比仅考虑SOBHB和WD前景时的估计值大$\sim 10^2$倍。这项工作是参考文献arXiv:2508.05395中系列研究的第二篇，旨在量化LISA测量代表性宇宙弦模型的能力。
英文摘要
We study the reconstruction of conventional cosmic-string signals with LISA in the presence of all major known astrophysical foregrounds expected in the LISA band. These include stellar-origin black-hole binaries (SOBHBs), galactic (WDs) and extragalactic (ExWDs) white dwarfs, extreme-mass-ratio-inspirals (EMRIs), and massive black-hole binaries (MBHBs). Using the Simulation-based Inference package GWBackFinder, we perform a joint inference on the LISA noise, foregrounds, and signal, across a range of injected string tensions $Gμ$. We find that reconstructing tensions with an error $\lesssim 10\%$ requires values as large as $Gμ\gtrsim 10^{-11}$, i.e. a factor $\sim10^5$ larger than previous estimates with no foregrounds, and $\sim 10^2$ larger compared to estimates accounting only for SOBHB and WD foregrounds. This work is the second in a series initiated in Ref. arXiv:2508.05395, which aims to quantify LISA's ability to measure representative cosmic-string models.
Comments18 pages + 7 figures
