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arXiv 2603.04792gr-qcastro-ph.HE
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在第四LIGO-Virgo-KAGRA观测运行第一阶段中,对五颗恒星球状星团中未知中子星的连续引力波进行搜索

Search for continuous gravitational waves from neutron stars in five globular clusters in the first part of the fourth LIGO-Virgo-KAGRA observing run

University of Michigan(密歇根大学);Universitat de les Illes Balears(巴利阿里群岛大学);LIGO Livingston Observatory(LIGO利文斯顿天文台);Instituto Nacional de Pesquisas Espaciais(国家空间研究所);University of British Columbia(不列颠哥伦比亚大学);University of Melbourne(墨尔本大学)
Damon H. T. Cheung, Keith Riles, Rafel Amengual, Preet Baxi, Alicia Calafat, Anamaria Effler, Tabata Aira Ferreira, Evan Goetz, David Keitel, Tom Kimpson, Alan … 展开作者

Damon H. T. Cheung, Keith Riles, Rafel Amengual, Preet Baxi, Alicia Calafat, Anamaria Effler, Tabata Aira Ferreira, Evan Goetz, David Keitel, Tom Kimpson, Alan M. Knee, Joan-Rene Merou, Quynh Lan Nguyen, Joseph O'Leary, Ornella J. Piccinni, Alicia M. Sintes, Rebekah Slocum, Karl Wette

AI总结:

该研究利用LIGO数据对五颗球状星团中的中子星连续引力波进行了定向搜索,取得了迄今为止最灵敏的探测结果,特别是在NGC 6397中实现了极低的引力波上限。

摘要:

我们介绍了在第四LIGO-Virgo-KAGRA观测运行前八个月的LIGO数据中,针对未知中子星的连续引力波进行定向搜索的结果。我们使用WEAVE半相干程序进行搜索,该程序在多个时间段上对匹配滤波检测统计值进行求和。在假设源年龄大于300年的搜索带20-475Hz中,未检测到引力波信号。在数据中注入模拟的连续波信号表明,我们在大部分探索的参数空间中获得了迄今为止最灵敏的结果,获得了中位数95%置信水平上限,近282Hz时为约4.2×10^-26的NGC 6397。

英文摘要:

We present the results of directed searches for continuous gravitational waves from unknown neutron stars in five Milky Way globular clusters. We carry out these searches in the LIGO data from the first eight months of the fourth LIGO-Virgo-KAGRA observing run using the WEAVE semicoherent program, which sums matched-filter detection-statistic values over many time segments spanning the observation period. No gravitational wave signal is detected in the search band of 20-475 Hz. Injections of simulated continuous wave signals in the data indicate that we achieve the most sensitive results to date across most of the explored parameter space volume, obtaining median 95% confidence level upper limits as low as $\sim 4.2 \times 10^{-26}$ near 282 Hz for NGC 6397. We also derive upper limits on neutron star ellipticity and $r$-mode amplitudes, reaching $\lesssim 10^{-5}$ and $\lesssim 10^{-3}$, respectively, at frequencies above 200 Hz.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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