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arXiv 2309.09448astro-ph.HEastro-ph.CO
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快速射电暴:极端质量比旋近的电磁对应体

Fast Radio Bursts: Electromagnetic Counterparts to Extreme Mass Ratio Inspirals

Rui-Nan Li, Zhen-Yin Zhao, Zhifu Gao, F. Y. Wang

AI总结:

本文研究超大质量黑洞-中子星双星系统中与快速射电暴相关联的极端质量比旋近引力波信号,提出FRB可作为EMRI的电磁对应体,并可用作独立宇宙学探针。

摘要:

近期观测发现,一些重复快速射电暴(FRBs)表现出较大的法拉第旋转量(RMs)值及其复杂变化。包含一个超大质量黑洞(SMBH)和一个中子星(NS)的双星系统可以用来解释这种RM变化。同时,这类系统会产生低频引力波(GW)信号,这是三个拟议中的空间引力波探测器——激光干涉仪空间天线(LISA)、天琴和太极——的主要科学目标之一。这些信号被称为极端质量比旋近(EMRIs)。因此,FRBs可以作为EMRI信号的电磁(EM)对应体候选者。在本信中,我们研究了该双星系统中的EMRI信号,在最乐观的情况下,LISA和天琴可以探测到红移至$z\sim0.04$的此类信号。假设FRB产生机制为宇宙梳模型,总事件率可高达$\sim1$ Gpc$^{-3}$ yr$^{-1}$。与FRB相关联的EMRI信号可用于揭示FRB的前身天体。它也是一种新型标准汽笛,可作为独立的宇宙学探针使用。

英文摘要:

Recent observations discovered that some repeating fast radio bursts (FRBs) show a large value and complex variations of Faraday rotation measures (RMs). The binary systems containing a supermassive black hole (SMBH) and a neutron star (NS) can be used to explain such RM variations. Meanwhile, such systems produce low-frequency gravitational wave (GW) signals, which are one of the primary interests of three proposed space-based GW detectors: the Laser Interferometer Space Antenna (LISA), Tianqin and Taiji. These signals are known as extreme mass ratio inspirals (EMRIs). Therefore, FRBs can serve as candidates of electromagnetic (EM) counterparts for EMRI signals. In this letter, we study the EMRI signals in this binary system, which can be detected up to $z\sim0.04$ by LISA and Tianqin for the most optimistic case. Assuming the cosmic comb model for FRB production, the total event rate can be as high as $\sim1$ Gpc$^{-3}$ yr$^{-1}$. EMRI signals associated with FRBs can be used to reveal the progenitor of FRBs. It is also a new type of standard siren, which can be used as an independent cosmological probe.

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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