Beating the spin-down limit on gravitational wave emission from the Crab pulsar
Beating the spin-down limit on gravitational wave emission from the Crab pulsar
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DOI：
10.1086/591526
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发表时间：
2008-08-10
影响因子：
7.9
通讯作者：
Santostasi, G.
中科院分区：
文献类型：
--
作者：
Abbott, B.;Abbott, R.;Santostasi, G.
我们利用激光干涉仪引力波天文台（LIGO）第五次科学运行的前9个月的数据，提出了蟹状脉冲星引力波发射的直接上限。这些限制是基于两个搜索。在第一种假设中，我们假设引力波发射遵循观测到的射电时间，给出了引力波发射的上限，该上限超过了从脉冲星的自旋下降和制动指数以及星云的能量学推断的间接极限。在第二种情况下，我们允许引力波和无线电信号频率之间有一个小的不匹配，并在两种可能的引力波发射机制的背景下解释我们的结果。
We present direct upper limits on gravitational wave emission from the Crab pulsar using data from the first 9 months of the fifth science run of the Laser Interferometer Gravitational-wave Observatory (LIGO). These limits are based on two searches. In the first we assume that the gravitational wave emission follows the observed radio timing, giving an upper limit on gravitational wave emission that beats indirect limits inferred from the spin-down and braking index of the pulsar and the energetics of the nebula. In the second we allow for a small mismatch between the gravitational and radio signal frequencies and interpret our results in the context of two possible gravitational wave emission mechanisms.