Cosmological Parameter Estimate from Persistent Radio Sources of Fast Radio Bursts
We introduce a novel method to constrain the Hubble constant ( H _0 ) by combining fast radio bursts (FRBs) and their persistent radio sources (PRSs) through the observationally validated Yang relation, L _ν ∝ ∣RM∣, which links PRS luminosity to the rotation measure of the associated FRB. Using a m...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2025-01-01
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| Series: | The Astrophysical Journal Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/2041-8213/adcc30 |
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| Summary: | We introduce a novel method to constrain the Hubble constant ( H _0 ) by combining fast radio bursts (FRBs) and their persistent radio sources (PRSs) through the observationally validated Yang relation, L _ν ∝ ∣RM∣, which links PRS luminosity to the rotation measure of the associated FRB. Using a mock sample of PRSs, we demonstrate that the Yang relation can help to unravel the degeneracies among H _0 , baryon density parameter Ω _b , and baryon fraction in the intergalactic medium f _IGM in the traditional approach of using dispersion measure only to perform cosmological analyses. Our method employs a two-stage Markov Chain Monte Carlo analysis to constrain H _0 . Using the available data of six observed PRS systems, we obtain a preliminary constraint of H _0 = 75 ± 30 km s ^−1 Mpc ^−1 . We briefly discuss possible refinements of the method by reducing residual degeneracies and systematic uncertainties using future data and physical modeling. Our results indicate that the Yang relation can potentially become a new probe for performing FRB cosmology. |
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| ISSN: | 2041-8205 |