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arXiv 0903.4791gr-qc
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用非偏心模板库搜寻偏心致密双星发射的引力波信号:对地基探测器的启示

Searching for gravitational-wave signals emitted by eccentric compact binaries using a non-eccentric template bank: implications for ground-based detectors

T Cokelaer, D Pathak

摘要:

当它们的引力波信号进入LIGO或VIRGO等地面探测器的频带时,大多数的螺旋形紧凑双星预计将被环形化。然而,不排除其中一些双星可能仍然具有几十赫兹的显著偏心率。尽管存在这种可能性,但基于匹配过滤技术的当前搜索管道仅考虑非偏心模板。Martel和Poisson(1999 Phys.Rev.D60 124008)在初始LIGO探测器的背景下研究了这种近似对信噪比(SNR)损失的影响。他们确定,非偏心模板将成功检测偏心信号。我们通过结合当前和未来的地基探测器重新审视他们的工作,并精确量化SNR的确切损失。为了更忠实于实际搜索,我们在模板库上最大化SNR,其最小匹配设置为95%。PACS编号:02.70。c,07.05.Kf,95.85.Sz,97.80.- d(本文中的某些数字仅在电子版中为彩色)

英文摘要:

Most of the inspiralling compact binaries are expected to be circularized by the time their gravitational-wave signals enter the frequency band of ground-based detectors such as LIGO or VIRGO. However, it is not excluded that some of these binaries might still possess a significant eccentricity at a few tens of hertz. Despite this possibility, current search pipelines based on matched filtering techniques consider only non-eccentric templates. The effect of such an approximation on the loss of signal-to-noise ratio (SNR) has been investigated by Martel and Poisson (1999 Phys. Rev. D 60 124008) in the context of initial LIGO detector. They ascertained that non-eccentric templates will be successful at detecting eccentric signals. We revisit their work by incorporating current and future ground-based detectors and precisely quantify the exact loss of SNR. In order to be more faithful to an actual search, we maximized the SNR over a template bank, whose minimal match is set to 95%. PACS numbers: 02.70.-c, 07.05.Kf, 95.85.Sz, 97.80.-d (Some figures in this article are in colour only in the electronic version)

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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