论文标题
搜索带有Parkes Pulsar Pulsar Piming Array的宇宙弦尖的引力波爆发
Searching for gravitational wave bursts from cosmic string cusps with the Parkes Pulsar Timing Array
论文作者
论文摘要
宇宙弦是可以通过脉冲星定时阵列（PTA）探测的潜在重力波（GW）源。在这项工作中，我们开发了一种从宇宙字符串上的尖端爆发的GW爆发的检测算法，并将其应用于Parkes PTA数据。我们发现四个事件的错误警报概率小于1％。但是，进一步的调查表明，所有这些都可能是虚假的。由于没有令人信服的检测，我们在不同的事件持续时间内将上限放在GW振幅上。从这些界限中，我们对G Mu〜10^{-5}的宇宙弦张力放置限制，并强调该界限独立于使用其他技术获得的界限。我们讨论了我们的结果的物理含义以及在平方公里阵列（SKA）时代探测宇宙弦的前景。
Cosmic strings are potential gravitational wave (GW) sources that can be probed by pulsar timing arrays (PTAs). In this work we develop a detection algorithm for a GW burst from a cusp on a cosmic string, and apply it to Parkes PTA data. We find four events with a false alarm probability less than 1%. However further investigation shows that all of these are likely to be spurious. As there are no convincing detections we place upper limits on the GW amplitude for different event durations. From these bounds we place limits on the cosmic string tension of G mu ~ 10^{-5}, and highlight that this bound is independent from those obtained using other techniques. We discuss the physical implications of our results and the prospect of probing cosmic strings in the era of Square Kilometre Array (SKA).
