arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 0812.4870gr-qc
收藏

Virgo C7数据中的引力波爆发搜索

Gravitational wave burst search in the Virgo C7 data

The Virgo Collaboration, F. Acernese

摘要:

利用2005年9月在5天内获得的Virgo C7试运行数据,对引力波爆发事件进行了搜索。它侧重于150 Hz至2 kHz频率范围内的未建模短持续时间信号。还进行了旨在探测二元黑洞合并的合并和衰荡阶段的GW发射的搜索。需要对数据有广泛的理解,才能使用一个探测器的输出来处理突发搜索。对于未建模的引力波搜索,已推导出Virgo C7灵敏度曲线预期事件数量的90%置信水平上限作为信号强度的函数。所提出的分析的灵敏度是,在平方根和应变振幅,$h_{rss} \simeq 10^{-20} / \sqrt{Hz}$。这可以解释为,在90%置信水平下,可检测到的引力波波爆发的速率${\cal{R}}_{90%}$的频率上限为每天1.1个事件。从二进制黑洞搜索,我们得到的距离达到50%和90%的效率作为最终的黑洞的总质量的函数。通过对C7数据的分析,得到了非自旋等质量高黑洞双星系统的最大探测距离为$\simeq$ 2.9-$\pm$ 0.1 Mpc,对总质量为$80 M_{\odot}$的双星系统的探测效率为50%.

英文摘要:

A search for gravitational wave burst events has been performed with the Virgo C7 commissioning run data that have been acquired in September 2005 over five days. It focused on un-modeled short duration signals in the frequency range 150 Hz to 2 kHz. A search aimed at detecting the GW emission from the merger and ringdown phases of binary black hole coalescences was also carried out. An extensive understanding of the data was required to be able to handle a burst search using the output of only one detector. A 90% confidence level upper limit on the number of expected events given the Virgo C7 sensitivity curve has been derived as a function of the signal strength, for un-modeled gravitational wave search. The sensitivity of the analysis presented is, in terms of the root sum square strain amplitude, $h_{rss} \simeq 10^{-20} / \sqrt{Hz}$. This can be interpreted in terms of a frequentist upper limit on the rate ${\cal{R}}_{90%}$ of detectable gravitational wave bursts at the level of 1.1 events per day at 90% confidence level. From the binary black hole search, we obtained the distance reach at 50% and 90% efficiency as a function of the total mass of the final black hole. The maximal detection distance for non-spinning high and equal mass black hole binary system obtained by this analysis in C7 data is $\simeq$ 2.9 $\pm$ 0.1 Mpc for a detection efficiency of 50% for a binary of total mass $80 M_{\odot}$.

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。

↑