标题： 首次搜索蟹状星云脉冲星的r模引力波 显示英文标题

标题： First searches for gravitational waves from r-modes of the Crab pulsar

摘要： 我们首次对蟹状星云脉冲星的r模进行了引力波搜索，使用F统计量，分别且相干地整合了先进LIGO前两次观测运行中三个时间段的数据。第二次运行在中间因脉冲星出现一次跃变而被分为两部分。搜索的频率和导数基于Caride等人在Phys. Rev. D 100, 064013 (2019)中描述的脉冲星自转下降参数的射电测量结果。我们没有发现任何引力波的证据。我们对引力波本征应变的90%置信度上限分别为第一次运行的1.5e-25，第二次运行第一段的1.3e-25，以及第二次运行第二段的1.1e-25。这些是首次超越已知脉冲星自转下降极限的r模引力波上限，并且在振幅上超过一个数量级或在光度上超过两个数量级。 显示英文摘要

摘要： We present the first searches for gravitational waves from r-modes of the Crab pulsar, coherently and separately integrating data from three stretches of the first two observing runs of Advanced LIGO using the F-statistic. The second run was divided in two by a glitch of the pulsar roughly halfway through. The frequencies and derivatives searched were based on radio measurements of the pulsar's spin-down parameters as described in Caride et al., Phys. Rev. D 100, 064013 (2019). We did not find any evidence of gravitational waves. Our best 90% confidence upper limits on gravitational wave intrinsic strain were 1.5e-25 for the first run, 1.3e-25 for the first stretch of the second run, and 1.1e-25 for the second stretch of the second run. These are the first upper limits on gravitational waves from r-modes of a known pulsar to beat its spin-down limit, and they do so by more than an order of magnitude in amplitude or two orders of magnitude in luminosity.