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arXiv 1202.3512astro-ph.COgr-qc
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具有DECIGO路径的银河系中等质量黑洞双星的引力波观测

Gravitational wave observations of galactic intermediate-mass black hole binaries with DECIGO Path Finder

Kent Yagi

摘要:

DECIGO路径探测器(DPF)是星载引力波(GW)探测器,灵敏度在0.1- 100 Hz。作为DECIGO的第一步任务,它的目标是在2016- 2017年发射。虽然其主要目标是演示在空间观测GW的技术,但DPF仍然有机会探测GW信号并进行天体物理观测。其观测范围可达50千秒差距,主要目标是银河系中等质量黑洞(IMBH)双星的GW信号。通过使用inspiral-merge-ringdown唯象波形,我们进行了模式平均分析和蒙特卡罗模拟,包括探测器运动的影响,发现可以确定的质量和(有效)自旋的IMBHs的误差为百分之几,如果信号被检测到。由于来自质量超过$10^4 M_\odot$的IMBH双星的GW信号不能被地面探测器探测到,这些物体可能是DPF的独特来源。如果用DPF探测到一个$10^3M_\odot$ IMBH双星的内旋信号,它可以在聚并前向地面探测器$10^2$ - $10^3$ s发出振铃信号。我们还估计了引力子康普顿波长的可能的约束从一个可能的IMBH二进制的$ω$半人马座。我们得到了一个比太阳系实验稍弱的约束和一个比脉冲双星实验强2个数量级的约束。不幸的是,IMBH二进制文件的检测率相当小。

英文摘要:

DECIGO Path Finder (DPF) is a space-borne gravitational wave (GW) detector with sensitivity in the frequency band 0.1--100Hz. As a first step mission to DECIGO, it is aiming for launching in 2016--2017. Although its main objective is to demonstrate technology for GW observation in space, DPF still has a chance of detecting GW signals and performing astrophysical observations. With an observable range up to 50 kpc, its main targets are GW signals from galactic intermediate mass black hole (IMBH) binaries. By using inspiral-merger-ringdown phenomenological waveforms, we perform both pattern-averaged analysis and Monte Carlo simulations including the effect of detector motion to find that the masses and (effective) spins of the IMBHs could be determined with errors of a few percent, should the signals be detected. Since GW signals from IMBH binaries with masses above $10^4 M_\odot$ cannot be detected by ground-based detectors, these objects can be unique sources for DPF. If the inspiral signal of a $10^3M_\odot$ IMBH binary is detected with DPF, it can give alert to the ringdown signal for the ground-based detectors $10^2$--$10^3$s before coalescence. We also estimate the possible bound on the graviton Compton wavelength from a possible IMBH binary in $ω$ Centauri. We obtain a slightly weaker constraint than the solar system experiment and an about 2 orders of magnitude stronger constraint than the one from binary pulsar tests. Unfortunately, the detection rate of IMBH binaries is rather small.

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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