Probing Cosmology with 92 Localized Fast Radio Bursts and DESI BAO
Yi-Ying Wang, Shi-Jie Gao, Yi-Zhong Fan

TL;DR
This study uses 92 localized fast radio bursts combined with DESI BAO, CMB, and supernova data to investigate dark energy properties and measure the Hubble constant, revealing potential deviations from the standard cosmological model.
Contribution
It introduces the use of localized FRBs with existing cosmological data to constrain dark energy parameters and Hubble constant, highlighting the importance of Galactic dispersion measure modeling.
Findings
DDE remains preferred over CDM without CMB data.
Joint analysis constrains dark energy EoS parameters with significance.
FRB-based H0 estimates depend on Galactic electron density models.
Abstract
Recent baryon acoustic oscillation (BAO) measurements from the Dark Energy Spectroscopic Instrument (DESI) collaboration, combined with the cosmic microwave background (CMB) and type Ia supernovae (SNe Ia) observations, suggest a preference for dynamical dark energy (DDE) with and . Given the cosmological origin of fast radio bursts (FRBs), the combination of their dispersion measures and host galaxy redshifts makes localized FRBs a valuable tool for probing cosmology. Using an updated sample of 92 localized FRBs, along with DESI BAO, PlantheonPlus and CMB data, we constrain the dark energy (DE) equation of state (EoS) under the Chevallier-Polarski-Linder (CPL) parameterization. We find that even without incorporating CMB data, DDE remains preferred with and at a confidence level of . A…
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Taxonomy
TopicsRadio Astronomy Observations and Technology · Pulsars and Gravitational Waves Research · Geophysics and Gravity Measurements
