Refined Constraints on the Hubble Constant from Localized FRBs with Assessment of Systematic Effects

Abstract

The dispersion measure-redshift relation of fast radio bursts (FRBs) provides a valuable cosmological probe for constraining the Hubble constant, offering an independent measurement that could help resolve the ongoing Hubble tension. In this paper, we begin with a sample of 117 localized FRBs and use 95 of them to constrain $H_0$ to $71.28_{-2.08}^{+1.90}$ km s${}^{-1}$ Mpc${}^{-1}$ within the standard Lambda Cold Dark Matter ($\Lambda$CDM) model. The resulting statistical uncertainty is below 2.8\%, improving previous FRB-based measurements and highlighting the promise of larger future samples. Beyond statistical improvements, we note that different parameter choices have been adopted in previous studies and some results show discrepancies in $H_0$. To address this issue, we perform a systematic assessment of modeling uncertainties that can affect the inferred value of $H_0$, including Galactic electron density models, the contribution of the Galactic halo, outliers such as FRB~20190520B located in extreme environments, and the other parameter selections. We also discuss possible approaches to mitigate these sources of uncertainty, emphasizing both the challenges and prospects of using FRBs as reliable cosmological tools.

17 pages, 6 figures. This is the preprint version corresponding to the published article in ApJ 988, 177 (2025). A cross-listing to astro-ph.CO is kindly requested due to the relevance to cosmological parameter constraints

References in corpus (45)

• A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km/s/Mpc Uncertainty from the Hubble Space Telescope and the SH0ES Team
• A bright millisecond radio burst of extragalactic origin
• A New Electron Density Model for Estimation of Pulsar and FRB Distances
• A fast radio burst associated with a Galactic magnetar
• A bright millisecond-duration radio burst from a Galactic magnetar
• A census of baryons in the Universe from localized fast radio bursts
• Fast Radio Bursts
• The Baryon Census in a Multiphase Intergalactic Medium: 30% of the Baryons May Still Be Missing
• Highest-frequency detection of FRB 121102 at 4-8 GHz using the Breakthrough Listen Digital Backend at the Green Bank Telescope
• Locating the "missing" baryons with extragalactic dispersion measure estimates
• The Physical Mechanisms of Fast Radio Bursts
• A repeating fast radio burst associated with a persistent radio source
• Cosmological implications of Fast Radio Burst / Gamma-Ray Burst Associations
• Host Galaxy Properties and Offset Distributions of Fast Radio Bursts: Implications for their Progenitors
• A nearby repeating fast radio burst in the direction of M81
• Probing Galactic Halos with Fast Radio Bursts
• Characterizing the FRB host galaxy population and its connection to transients in the local and extragalactic Universe
• LOFAR Detection of 110-188 MHz Emission and Frequency-Dependent Activity from FRB 20180916B
• Fast radio bursts as a cosmic probe?
• FRB Energetics and detectability from high redshifts
• A measurement of Hubble's Constant using Fast Radio Bursts
• The z-DM distribution of fast radio bursts
• A Local Universe Host for the Repeating Fast Radio Burst FRB 20181030A
• The Galactic Halo Contribution to the Dispersion Measure of Extragalactic Fast Radio Bursts
• A Distant Fast Radio Burst Associated to its Host Galaxy with the Very Large Array
• Deep Synoptic Array science I: discovery of the host galaxy of FRB 20220912A
• Chronicling the Host Galaxy Properties of the Remarkable Repeating FRB 20201124A
• Intergalactic medium dispersion measures of fast radio bursts estimated from IllustrisTNG simulation and their cosmological applications
• A luminous fast radio burst that probes the Universe at redshift 1
• An FRB Sent Me a DM: Constraining the Electron Column of the Milky Way Halo with Fast Radio Burst Dispersion Measures from CHIME/FRB
• First discoveries and localisations of Fast Radio Bursts with MeerTRAP: a real-time, commensal MeerKAT survey
• Sub-arcminute localization of 13 repeating fast radio bursts detected by CHIME/FRB
• A search for the host galaxy of FRB171020
• The Commensal Real-time ASKAP Fast Transient incoherent-sum survey
• Cosmological-model-independent determination of Hubble constant from fast radio bursts and Hubble parameter measurements
• Cosmology with fast radio bursts in the era of SKA
• A fast radio burst localized at detection to an edge-on galaxy using very-long-baseline interferometry
• A forecast of using fast radio burst observations to constrain holographic dark energy
• Quantifying Baryonic Feedback on Warm-Hot Circumgalactic Medium in CAMELS Simulations
• Probing Cosmology with 92 Localized Fast Radio Bursts and DESI BAO
• Fast Radio Bursts as probes of the late-time universe: a new insight on the Hubble tension
• Cosmography from well-localized Fast Radio Bursts
• Contemporaneous optical-radio observations of a fast radio burst in a close galaxy pair
• Modeling the Cosmic Dispersion Measure in the D < 120 Mpc Local Universe
• Constraining the Milky Way's Dispersion Measure Using FRB and X-ray Data