Gravitational waves from extreme-mass-ratio inspirals in equatorially eccentric orbits

Gravitational waves from extreme-mass-ratio inspirals in equatorially eccentric orbits
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赤道偏心轨道上极端质量比螺旋产生的引力波

DOI:
10.1142/s0218271814500643
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发表时间:
2014-07
影响因子:
2.2
通讯作者:
Wen-Biao Han
Wen-Biao Han
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Wen-Biao Han

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基于有效单体动力学(EOB)和频域Teukolsky方程相结合的数值框架,计算了赤道偏心轨道极值质量比激发态(EMRI)的波形。EOB动力学为求解Teukolsky方程和轨道演化提供了源项。同时,对Teukolsky方程进行频域数值计算,可以得到准确的波形模板。使用EOB动力学而不是收缩测地线轨道,可以包含对质量比的保守修正,从而确保准确的频率分量,也可以给出更合适的轨道演化。通过简单分析质量比对轨道频率的影响,以及小质量比ν引起的信号损失,我们建议对于质量比≳10-5,最好使用EOB哈密顿量和动力学而不是测地线激励来计算Teukolsky方程中的源项来产生波形。
Based on the numerical frame which combines the effective one-body (EOB) dynamics with the frequency-domain Teukolsky equation, we calculate the waveforms from the extreme-mass-ratio inspirals (EMRIs) with equatorially eccentric orbits. The EOB dynamics offers source term for solving the Teukolsky equation and also orbital evolution. At the same time, numerical calculation of the Teukolsky equation in frequency domain can give accurate waveform templates. Use of the EOB dynamics but not the shrinking geodesic orbit can include the conservative correction of mass-ratio so that make sure accurate frequency components, and also can give more appropriate orbital evolution. By simple analysis of the influence of the mass-ratio on orbital frequencies, and also signal losses caused by small mass-ratio ν, we suggest for the mass-ratio ≳ 10-5, it should be better to use the EOB Hamiltonian and dynamics but not geodesic inspirals to calculate the source term in the Teukolsky equation for generating waveforms.
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发表时间: 2010-06
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