宇宙双中子星的去磁引力波与GW 1Hz附近的前景清洗
Demagnified GWs from Cosmological Double Neutron Stars and GW Foreground Cleaning Around 1Hz
摘要：
强引力透镜效应会使来自宇宙学双中子星双星的引力波显著缩小，未来的BBO或DECIGO等探测任务可能会错过一些小于探测阈值的引力波信号。无法探测到的双星将形成GW前景，这可能会妨碍对非常弱的原始GW信号的探测。我们讨论了这个潜在的问题的前景，使用一个简单的模型的基础上奇异等温球透镜轮廓。幸运的是，预期对于NS+ NS的推测合并率，剩余前景将低于通过相关性分析用BBO/DECIGO实现的检测限Omega_{GW} ~ 10^{-16}。
英文摘要：
Gravitational waves from cosmological double neutron star binaries can be significantly demagnified by strong gravitational lensing effect, and the proposed future missions such as BBO or DECIGO might miss some of the demagnified GW signals below a detection threshold. The undetectable binaries would form a GW foreground which might hamper detection of a very weak primordial GW signal. We discuss the outlook of this potential problem, using a simple model based on the singular-isothermal-sphere lens profile. Fortunately, it is expected that, for presumable merger rate of NS+NSs, the residual foreground would be below the detection limit Omega_{GW} ~ 10^{-16} realized with BBO/DECIGO by correlation analysis.
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