FIRST SEARCH FOR GRAVITATIONAL WAVES FROM THE YOUNGEST KNOWN NEUTRON STAR
FIRST SEARCH FOR GRAVITATIONAL WAVES FROM THE YOUNGEST KNOWN NEUTRON STAR
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首次搜索来自已知最年轻中子星的引力波
DOI：
10.1088/0004-637x/722/2/1504
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
Abadie J
中科院分区：
文献类型：
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作者：
Abadie J
我们在超新星遗迹仙后座A中寻找来自中子星星的周期性引力波。该搜索连贯地分析了激光干涉仪引力波天文台第五次科学运行的12天间隔内的数据。它搜索100至300赫兹的引力波频率，并涵盖了适合残骸年龄和不同自旋下降机制的广泛的一阶和二阶频率导数。没有探测到引力波信号。在搜索频率的范围内，我们将内禀引力波应变的95%置信上限设为（0.7-1.2）× 10− 24，中子星星赤道椭圆率的95%置信上限设为（0.4-4）× 10− 4，中子星星r模振荡幅度的95%置信上限设为0.005-0.14。这些直接上限超过了由能量守恒推导出的间接极限，并进入了涉及晶体奇异物质或失控r模式的理论预测范围。本文也是第一个引力波搜索提出的r-模式振幅的上限。
We present a search for periodic gravitational waves from the neutron star in the supernova remnant Cassiopeia A. The search coherently analyzes data in a 12 day interval taken from the fifth science run of the Laser Interferometer Gravitational-Wave Observatory. It searches gravitational-wave frequencies from 100 to 300 Hz and covers a wide range of first and second frequency derivatives appropriate for the age of the remnant and for different spin-down mechanisms. No gravitational-wave signal was detected. Within the range of search frequencies, we set 95% confidence upper limits of (0.7–1.2)× 10− 24 on the intrinsic gravitational-wave strain,(0.4–4)× 10− 4 on the equatorial ellipticity of the neutron star, and 0.005–0.14 on the amplitude of r-mode oscillations of the neutron star. These direct upper limits beat indirect limits derived from energy conservation and enter the range of theoretical predictions involving crystalline exotic matter or runaway r-modes. This paper is also the first gravitational-wave search to present upper limits on the r-mode amplitude.