论文标题
搜索带有Parkes Pulsar定时阵列的宇宙字符串的重力波背景第二个数据发布
Search for the Gravitational-wave Background from Cosmic Strings with the Parkes Pulsar Timing Array Second Data Release
论文作者
论文摘要
我们直接搜索各向同性随机重力波背景（SGWB），该背景在Parkes Pulsar时正时阵列中产生的宇宙字符串产生了第二个数据释放。我们找不到这样的SGWB的证据，因此在宇宙弦乐张力（$gμ$）上放置了$ 95 \％$置信度的上限，这是重新连接概率的功能，即$ p $，在字符串理论启发的模型中可能小于1。宇宙弦张力上的上限为$Gμ\ Lessim 5.1 \ times 10^{ - 10} $，对于$ P = 1 $，比从PPTA DR2中的宇宙cosps casmic string cusps的null systy Rection Waver爆发的界限更高五个数量级。
We perform a direct search for an isotropic stochastic gravitational-wave background (SGWB) produced by cosmic strings in the Parkes Pulsar Timing Array second data release. We find no evidence for such an SGWB, and therefore place $95\%$ confidence level upper limits on the cosmic string tension, $Gμ$, as a function of the reconnection probability, $p$, which can be less than 1 in the string-theory-inspired models. The upper bound on the cosmic string tension is $Gμ\lesssim 5.1 \times 10^{-10}$ for $p = 1$, which is about five orders of magnitude tighter than the bound derived from the null search of individual gravitational wave burst from cosmic string cusps in the PPTA DR2.
