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arXiv 2404.03046astro-ph.HEgr-qc
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是否已发现任何 LISA 验证双星?

Have any LISA verification binaries been found?

Tyson B. Littenberg, Ananthu K. Lali

AI总结:

本文通过银河系引力波前景完整模拟评估已知电磁双星作为 LISA 验证双星的有效性,发现若不联合拟合整个星群会产生歧义和偏差。

摘要:

一些通过电磁手段观测到的超紧凑双星将成为 Laser Interferometer Space Antenna(LISA,激光干涉空间天线)等天基探测器的强引力波源。历史上,这些源一直被称为“验证双星”,其假设是它们将被用于评估任务性能。本文通过在银河系引力波前景的完整模拟背景下对已知银河系源进行定向分析,对这一情景进行了定量审视。我们发现,即使最大限度地利用有关这些源的可用信息,如果不同时拟合其余银河系星群,对目前已知最佳 LISA 双星的分析也容易出现歧义或偏差。尽管在 LISA 巡测之前或期间通过电磁方式发现的银河系双星是极具价值的多信使系统,但对银河系引力波前景进行全局处理的必要性,使人们怀疑它们是否是数据表征的最佳源。

英文摘要:

Some electromagnetically observed ultra-compact binaries will be strong gravitational wave sources for space-based detectors like the Laser Interferometer Space Antenna (LISA). These sources have historically been referred to as "verification binaries" under the assumption that they will be exploited to assess mission performance. This paper quantitatively interrogates that scenario by considering targeted analyses of known galactic sources in the context of a full simulation of the galactic gravitational wave foreground. We find that the analysis of the best currently known LISA binaries, even making maximal use of the available information about the sources, is susceptible to ambiguity or biases when not simultaneously fitting to the rest of the galactic population. While galactic binaries discovered electromagnetically in advance of, or during, the LISA survey are highly valuable multimessenger systems, the need for a global treatment of the galactic gravitational wave foreground calls into question whether or not they are the best sources for data characterization.

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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