arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2307.16628gr-qcastro-ph.HEastro-ph.IM
收藏

TianQin与LISA对天体物理引力波源的探测

Detection of astrophysical gravitational wave sources by TianQin and LISA

Alejandro Torres-Orjuela, Shun-Jia Huang, Zheng-Cheng Liang, Shuai Liu, Hai-Tian Wang, Chang-Qing Ye, Yi-Ming Hu, Jianwei Mei

AI总结:

本文利用Fisher Matrix分析比较TianQin、LISA单独及联合探测多种低频引力波源的距离与参数测量精度,阐明联合探测及二者互补的价值。

摘要:

TianQin和LISA是计划于2030年代中期发射的天基激光干涉仪引力波(GW)探测器。两台探测器都将探测约10^-2 Hz附近的低频引力波,但TianQin对这一共同最佳灵敏频点以上的频率更敏感,而LISA对10^-2 Hz以下的频率更敏感。因此,TianQin和LISA将能够探测相同的波源,但根据波源及其参数的不同,探测精度也会有所不同。我们考察了TianQin和LISA将能够探测到的一些最重要的天体物理波源——大质量黑洞双星、恒星级质量黑洞双星、双白矮星、极端质量比旋近、轻型和重型中等质量比旋近,以及天体物理起源的随机引力背景。对于这些波源中的每一种,我们利用Fisher Matrix分析,分析它们能在多远距离被探测到(探测距离),以及其参数能被测量到多好(探测精度)。我们比较了三种探测情景(仅TianQin、仅LISA,以及LISA与TianQin联合探测)所得的结果,强调联合探测带来的增益,以及TianQin和LISA对天体物理波源综合研究的贡献。特别是,我们考虑了两台探测器不同的朝向、寿命和工作占空比,以探究它们在协同工作时如何给出一幅更完整的图景。

英文摘要:

TianQin and LISA are space-based laser interferometer gravitational wave (GW) detectors planned to be launched in the mid-2030s. Both detectors will detect low-frequency GWs around $10^{-2}\,{\rm Hz}$, however, TianQin is more sensitive to frequencies above this common sweet-spot while LISA is more sensitive to frequencies below $10^{-2}\,{\rm Hz}$. Therefore, TianQin and LISA will be able to detect the same sources but with different accuracy depending on the source and its parameters. We consider some of the most important astrophysical sources -- massive black hole binaries, stellar-mass black hole binaries, double white dwarfs, extreme mass ratio inspirals, light and heavy intermediate mass ratio inspirals, as well as the stochastic gravitational background of astrophysical origin -- that TianQin and LISA will be able to detect. For each of these sources, we analyze how far they can be detected (detection distance) and how well their parameters can be measured (detection accuracy) using a Fisher Matrix analysis. We compare the results obtained by the three detection scenarios (TianQin alone, LISA alone, and joint detection by LISA and TianQin) highlighting the gains from joint detection as well as the contribution of TianQin and LISA to a combined study of astrophysical sources. In particular, we consider the different orientations, lifetimes, and duty cycles of the two detectors to explore how they can give a more complete picture when working together.

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。

↑