arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2106.04883gr-qcastro-ph.HE
收藏

用地面laser干涉仪和原子干涉仪引力波观测仪探测中子中子星的偶极辐射

Probing dipole radiation from binary neutron stars with ground-based laser-interferometer and atom-interferometer gravitational-wave observatories

Junjie Zhao, Lijing Shao, Yong Gao, Chang Liu, Zhoujian Cao, Bo-Qiang Ma

摘要:

原子干涉引力波(GW)观测站作为一种新型的地基GW探测器,具有较低的观测灵敏度。以原子干涉仪--昭山长基线原子干涉仪引力天线(ZAIGA)及其升级版(Z+)为例,研究了原子干涉仪如何与地面激光干涉仪互补,用于测量双星中子星(BNS)合并产生的引力偶极辐射。这样的测试对于更好地理解强等效原理是很重要的,强等效原理是爱因斯坦广义相对论的核心。为了获得统计上合理的结果,我们抽样BNS系统根据他们的合并率和人口,从中我们研究的参数化偶极子辐射参数$B$的预期范围。从地面激光干涉仪和原子干涉仪ZAIGA/Z+的组合中提取BNS参数和偶极辐射,与地面激光干涉仪单独相比,我们有权获得几倍到几个数量级的$B$的更严格的界限,最终达到$|B| \lesssim 10^{-9}$(与ZAIGA)和$|B| \lesssim 10^{-10}$(与Z+)的水平。

英文摘要:

Atom-interferometer gravitational-wave (GW) observatory, as a new design of ground-based GW detector for the near future, is sensitive at a relatively low frequency for GW observations. Taking the proposed atom interferometer Zhaoshan Long-baseline Atom Interferometer Gravitation Antenna (ZAIGA), and its illustrative upgrade (Z+) as examples, we investigate how the atom interferometer will complement ground-based laser interferometers in testing the gravitational dipole radiation from binary neutron star (BNS) mergers. A test of such kind is important for a better understanding of the strong equivalence principle laying at the heart of Einstein's general relativity. To obtain a statistically sound result, we sample BNS systems according to their merger rate and population, from which we study the expected bounds on the parameterized dipole radiation parameter $B$. Extracting BNS parameters and the dipole radiation from the combination of ground-based laser interferometers and the atom-interferometer ZAIGA/Z+, we are entitled to obtain tighter bounds on $B$ by a few times to a few orders of magnitude, compared to ground-based laser interferometers alone, ultimately reaching the levels of $|B| \lesssim 10^{-9}$ (with ZAIGA) and $|B| \lesssim 10^{-10}$ (with Z+).

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。

↑