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arXiv 1009.1985gr-qc
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爱因斯坦望远镜中的中等质量比螺旋:I。信噪比计算

Intermediate-mass-ratio-inspirals in the Einstein Telescope: I. Signal-to-noise ratio calculations

E. A. Huerta, Jonathan R. Gair

摘要:

爱因斯坦望远镜(Einstein Telescope,ET)是第三代地基干涉仪,其目标是灵敏度比先进LIGO高出十倍,频率范围延伸到约1Hz。ET将提供在强场中检验爱因斯坦相对论的机会,并将实现精确的引力波天文学,其预期事件数量将比先进的地面探测器增加一千倍。ET的设计研究目前正在进行中,因此现在是评估可以用这种仪器完成的科学的时候了。本文是第一个系列,将进行详细的研究中质量比吸入(IMRI)的ET。在ET的背景下,IMRI是中子星或恒星质量的黑洞进入中等质量黑洞(IMBH)的螺旋。在本文中,我们专注于圆形和赤道吸气IMRI波形模型的发展。我们考虑两个近似的波形,这两个都纳入了螺旋,合并和振铃阶段在一个一致的方式。一种近似,适用于任意自旋的IMBH,使用Ori和Thorne [1]的跃迁模型来描述合并,然后将其平滑地匹配到振铃波形上。第二种近似使用有效单体(EOB)方法来模拟波形的合并阶段,并且对非旋转IMBH有效。在本文中,我们使用这两种波形模型来计算信噪比(SNR)的IMRI源检测ET。在z=1的红移下,我们发现质量为1.4+100太阳质量、10+100太阳质量、1.4+500太阳质量和10+500太阳质量的IMRI系统的典型信噪比分别约为10-25、40-80、3-15和10-60。我们还发现,这两个模型对非旋转吸气的预测一致性约为10%。

英文摘要:

The Einstein Telescope (ET) is a proposed third generation ground-based interferometer, for which the target is a sensitivity that is a factor of ten better than Advanced LIGO and a frequency range that extends down to about 1Hz. ET will provide opportunities to test Einstein's theory of relativity in the strong field and will realize precision gravitational wave astronomy with a thousandfold increase in the expected number of events over the advanced ground-based detectors. A design study for ET is currently underway, so it is timely to assess the science that could be done with such an instrument. This paper is the first in a series that will carry out a detailed study of intermediate-mass-ratio inspirals (IMRIs) for ET. In the context of ET, an IMRI is the inspiral of a neutron star or stellar-mass black hole into an intermediate mass black hole (IMBH). In this paper we focus on the development of IMRI waveform models for circular and equatorial inspirals. We consider two approximations for the waveforms, which both incorporate the inspiral, merger and ringdown phases in a consistent way. One approximation, valid for IMBHs of arbitrary spin, uses the transition model of Ori and Thorne [1] to describe the merger, and this is then matched smoothly onto a ringdown waveform. The second approximation uses the Effective One Body (EOB) approach to model the merger phase of the waveform and is valid for non-spinning IMBHs. In this paper, we use both waveform models to compute signal-to-noise ratios (SNRs) for IMRI sources detectable by ET. At a redshift of z=1, we find typical SNRs for IMRI systems with masses 1.4+100 solar masses, 10+100 solar masses, 1.4+500 solar masses and 10+500 solar masses of about 10-25, 40-80, 3-15 and 10-60, respectively. We also find that the two models make predictions for non-spinning inspirals that are consistent to about ten percent.

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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