arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0712.3199gr-qc
收藏

沿后牛顿精确偏心轨道螺旋运动的致密双星的引力波:数据分析意义

Gravitational waves from compact binaries inspiralling along post-Newtonian accurate eccentric orbits: Data analysis implications

M. Tessmer, A. Gopakumar

摘要:

沿偏心轨道旋转的致密双星是地基激光干涉仪的引力波源。我们探索的损失,在事件发生率时,从紧凑的二进制文件,沿着后牛顿精确偏心轨道与某些明显的非最佳搜索模板的灵感搜索GW。对于本分析,具有2.5后牛顿精确轨道演化的GW信号按照[T. Damour,A. Gopakumar和B. R. Iyer,Phys. Rev. \textbf{70},064028(2004)]。我们证明了搜索模板,模型在规范不变的方式GWs从紧凑的二进制inspirling qudrupolar辐射反应下沿2 PN精确的圆形轨道是非常有效的捕捉我们有点现实的GW信号。然而,基于绝热、完全绝热和规范依赖的完全非绝热近似的三种类型的搜索模板在[P. Ajith,B. R.伊耶角A. K. Robinson和B. S. Sathyaprakash,%``A new class of post-Newtonian approximants to the dynamics of inspiralling compact binaries:Test-mass in the Schwarzschild spacetime,'' Phys. Rev. D { \bf 71},044029(2005)],与四极辐射反应下的圆形内旋相关,发现在捕获上述偏心信号方面效率低下。我们的结论是,将需要进一步的调查,以探测各种类型的PN准确的圆形模板,用于分析LIGO/VIRGO数据,捕捉GWs从紧凑的双星具有微小的轨道偏心率的能力。

英文摘要:

Compact binaries inspiralling along eccentric orbits are plausible gravitational wave (GW) sources for the ground-based laser interferometers. We explore the losses in the event rates incurred when searching for GWs from compact binaries inspiralling along post-Newtonian accurate eccentric orbits with certain obvious non-optimal search templates. For the present analysis, GW signals having 2.5 post-Newtonian accurate orbital evolution are modeled following the phasing formalism, presented in [T. Damour, A. Gopakumar, and B. R. Iyer, Phys. Rev. D \textbf{70}, 064028 (2004)]. We demonstrate that the search templates that model in a gauge-invariant manner GWs from compact binaries inspiralling under qudrupolar radiation reaction along 2PN accurate circular orbits are very efficient in capturing our somewhat realistic GW signals. However, three types of search templates based on the adiabatic, complete adiabatic and gauge-dependent complete non-adiabatic approximants, detailed in [P. Ajith, B. R. Iyer, C. A. K. Robinson and B. S. Sathyaprakash, %``A new class of post-Newtonian approximants to the dynamics of inspiralling %compact binaries: Test-mass in the Schwarzschild spacetime,'' Phys. Rev. D {\bf 71}, 044029 (2005)], relevant for the circular inspiral under the qudrupolar radiation reaction were found to be inefficient in capturing the above mentioned eccentric signal. We conclude that further investigations will be required to probe the ability of various types of PN accurate circular templates, employed to analyze the LIGO/VIRGO data, to capture GWs from compact binaries having tiny orbital eccentricities.

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。

↑