Cosmological Constraints from Gravitational Wave–Fast Radio Burst Associations without Redshift Measurements for LIGO-Virgo and Cosmic Explorer

作者：Jia-Ming Zhu-Ge, Marios Kalomenopoulos, C.‐J. Haster, Bing Zhang · 发表于：The Astrophysical Journal · 年份：2026 · DOI：10.3847/1538-4357/ae84c4 · 研究领域：Pulsars and Gravitational Waves Research、Cosmology and Gravitation Theories、Gamma-ray bursts and supernovae

Abstract The potential association between gravitational waves (GWs) and fast radio bursts offers a unique multimessenger probe for cosmology. In this paper, we develop a redshift-independent framework to constrain cosmological parameters using the luminosity distance–dispersion measure (DM) relation, accounting for realistic astrophysical uncertainties. We perform a comprehensive comparative analysis across different GW detector sensitivities and modeling assumptions. Specifically, we investigate the performance of the current LIGO-Virgo (LV) network (at z < 0.2) versus the future Cosmic Explorer (CE). Our study further evaluates the impact of different DM distributions—specifically the corrected Macquart’s probability density function (Zhuge et al. 2026) and the log-normal distribution—and explores the influence of including or excluding host galaxy DM contributions. Using realistic simulated observations, we find that while the current LV network lacks the precision to provide meaningful constraints, CE will enable high-precision cosmology. Even without spectroscopic redshifts, CE observations can effectively break parameter degeneracies and robustly constrain both cosmology and host galaxy parameters. These results highlight the necessity of next-generation detectors.