使用GFH-v2流水线搜索超新星SN2023ixf的长时标引力波
Search for Long-Transient Gravitational Waves from Supernova SN2023ixf using GFH-v2 Pipeline
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中文总结 AI 辅助
该研究使用GFH-v2流水线定向搜索SN2023ixf可能新生磁星的引力波信号，未发现候选体，并设置了距离上限，首次将该方法应用于邻近核心坍缩超新星。
中文摘要 AI 辅助
我们针对SN2023ixf（M101星系中一颗邻近的II型核心坍缩超新星）可能形成的新生磁星残骸，开展了一次定向的长时标引力波搜索。该分析使用了LIGO Hanford和Livingston探测器在工程运行15（Engineering Run 15）期间的数据，采用与超新星相关的源内时间窗口内的重合数据。我们瞄准的信号来自一个快速旋转、非轴对称的中子星，其自转减慢主要由引力波辐射主导，导致频率呈幂律下降，应变幅度也相应减小。搜索采用基于广义频率Hough变换的GFH-v2流水线进行。没有候选体通过重合和后续分析。因此，我们设置了作为初始频率和椭率函数的最大可探测距离的上限。对于最高椭率区间，90%上限在分析频带的大部分范围内达到约1-2.5兆秒差距的距离。尽管这些上限低于到M101的距离，但该搜索是GFH-v2首次应用于邻近核心坍缩超新星，并表征了其在真实探测器数据上的性能。
英文摘要
We present a directed search for long-transient gravitational waves from the possible newborn magnetar remnant of SN2023ixf, a nearby Type II core-collapse supernova in the M101 galaxy. The analysis uses LIGO Hanford and Livingston data from Engineering Run 15, using coincident data lying within the on-source window associated with the supernova. We target signals from a rapidly rotating, non-axisymmetric neutron star whose spin-down is dominated by gravitational-wave emission, producing a power-law decrease in frequency and a corresponding decrease in strain amplitude. The search is performed with the GFH-v2 pipeline, based on the Generalized Frequency Hough transform. No candidate survives the coincidence and follow-up analysis. We therefore set upper limits on the maximum detectable distance as a function of initial frequency and ellipticity. For the highest ellipticity interval, the 90% upper limits reach distances of about 1-2.5~Mpc across most of the analysed band. Although these limits are below the distance to M101, the search provides the first application of GFH-v2 to a nearby core-collapse supernova and characterizes its performance on real detector data.
发表机构
- Ariel University（阿里埃勒大学）
- Istituto Nazionale di Fisica Nucleare-Roma 1（罗马第一国家核物理研究所）
- Università di Roma La Sapienza（罗马第一大学）
- INFN-CNAF - Bologna（博洛尼亚国家核物理研究所-国家加速器设施中心）
- IAC3, Universitat de les Illes Balears（巴利阿里群岛大学）
- Dipartimento di Fisica e Astronomia, Alma Mater Studiorum - Università di Bologna（博洛尼亚大学物理与天文学系）
机构由 AI 辅助整理，请以论文原文为准。
