Work

Fast Radio Burst Cosmology with the Rotation Measure–Persistent Radio Source Luminosity Correlation

Year: 2025

Type: article

Abstract: Fast radio bursts (FRBs) have emerged as a powerful tool for cosmological studies, particularly through the dispersion measure–redshift (DM– z ) relation. This work proposes a novel calibration method for FRBs using the Yang–Li–Zhang (YLZ) empirical relation, which links the rotation measure of FRBs to the luminosity of their associated persistent radio sources (PRS). We demonstrate that this approach provides independent constraints on cosmological parameters, bypassing limitations inherent to the traditional DM– z method. Utilizing the current sample of four YLZ-calibrated FRBs, we derive a Hubble constant measurement of H 0 = 86.1 8 − 14.99 + 18.03 km s − 1 Mpc − 1 (68% CL). Monte Carlo simulations indicate that a future catalog of 400 FRB-PSR systems could reduce the relative uncertainty of H 0 to 4.5%. Combining YLZ-calibrated FRBs with the DM– z sample reveals critical synergies: joint analysis of equalized samples ( N = 100 for both methods) reduces the relative uncertainty of H 0 to 2.9%, mainly because the incorporation of PRS observations substantially mitigates the degeneracy between the parameters such as intergalactic medium baryon mass fraction ( f IGM ) and other cosmological parameters inherent to the DM− z relation.

Source: The Astrophysical Journal

DOI: 10.3847/1538-4357/ae1a7d

Authors: Ran Gao, He Gao, Zhengxiang Li, Yuan-Pei Yang

Institutions: Beijing Normal University, Yunnan University, Chinese Academy of Sciences, Purple Mountain Observatory

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $4,499

Funders: National Natural Science Foundation of China, National Key Research and Development Program of China