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arXiv 0811.0188gr-qc
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用LISA EMRI观测探测低红移黑洞

Probing black holes at low redshift using LISA EMRI observations

Jonathan R Gair

摘要:

对于激光干涉仪空间天线(LISA)来说,最令人兴奋的潜在引力波源之一是近似太阳质量的致密物体进入星系中心大质量黑洞的吸气-极端质量比吸气(EMRI)。在整个任务期间,LISA应该观测到几十到几百个EMRI,主要是在低红移(z < 1)。每次观测都将提供主机系统参数的测量值,精度达到前所未有的水平。因此,LISA EMRI观测将提供一种新的和独特的方式来探测低红移的黑洞。在这篇文章中,我们提供了一个人口的EMRI事件,LISA可能会观察到的描述,并描述了事件的数量如何变化的基本假设有关的黑洞人口的变化。我们还提供了拟合函数,该拟合函数可以检测EMRI,并允许计算任意人口模型的LISA事件率。最后,我们讨论了一个正在进行的计划,将使用这些结果来评估LISA观测可能对星系演化模型造成的限制。

英文摘要:

One of the most exciting potential sources of gravitational waves for the Laser Interferometer Space Antenna (LISA) are the inspirals of approximately solar mass compact objects into massive black holes in the centres of galaxies - extreme mass ratio inspirals (EMRIs). LISA should observe between a few tens and a few hundred EMRIs over the mission lifetime, mostly at low redshifts (z < 1). Each observation will provide a measurement of the parameters of the host system to unprecendented precision. LISA EMRI observations will thus offer a new and unique way to probe black holes at low redshift. In this article we provide a description of the population of EMRI events that LISA is likely to observe, and describe how the numbers of events vary with changes in the underlying assumptions about the black hole population. We also provide fitting functions that characterise LISA's ability to detect EMRIs and which will allow LISA event rates to be computed for arbitrary population models. We finish with a discussion of an ongoing programme that will use these results to assess what constraints LISA observations could place on galaxy evolution models.

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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