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Fast Radio Bursts as probes of the late-time universe: a new insight on the Hubble tension

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arxiv 2410.01974 v2 pith:HPMMMAJT submitted 2024-10-02 astro-ph.CO astro-ph.HEgr-qc

Surajit Kalita (Warsaw) , Shruti Bhatporia (UCT) , Amanda Weltman (UCT) This is my paper
classification astro-ph.COastro-ph.HEgr-qc
keywords hubbleconstantfrbslate-timeradiotensionuniversebars
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abstract

Fast Radio Bursts (FRBs) are bright radio transient events, a subset of which have been localized to their host galaxies. Their high dispersion measures offer valuable insights into the ionized plasma along their line of sight, enabling them to serve as probes of cosmological parameters. One of the major challenges in contemporary cosmology is the Hubble tension -- an unresolved discrepancy between two independent methods of determining the Universe's expansion rate, yielding differing values for the Hubble constant. In this study, we analyze a sample of 64 extragalactic, localized FRBs observed by various telescopes, employing Bayesian analysis with distinct likelihood functions. Our findings suggest that FRBs serve as tracers of the Hubble constant in the late-time Universe. Notably, our results exhibit smaller error bars compared to previous studies, and the derived Hubble constant with 1$\sigma$ error bars no longer overlap with those obtained from early-Universe measurements. These results underscore the continuing tension between early- and late-time measurements of the Hubble constant.

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Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Dispersion Measure Distribution of Unlocalized Fast Radio Bursts as a Probe of the Hubble Constant

    astro-ph.CO 2026-04 unverdicted novelty 8.0 of 10

    The DM distribution of unlocalized FRBs yields H0 = 73.8 +14.0/-12.3 km/s/Mpc with 18% uncertainty.

  2. Generalized Distributions of Host Dispersion Measures in the Fast Radio Burst Cosmology

    astro-ph.CO 2025-10 unverdicted novelty 6.0 of 10

    Generalizing the host galaxy dispersion measure distribution in FRB cosmology with 125 events produces Hubble constant estimates consistent with Planck 2018 and SH0ES while strongly favoring these models over narrow-p...

  3. Calibrating $\rm{DM_{IGM}}-z$ relation using host galaxies of FRBs

    astro-ph.GA 2025-07 reject novelty 5.0 of 10

    A claimed tight sSFR-DM_exc correlation is used to calibrate the DM_IGM-z relation, but the improvement is evaluated on the same data used to fit the model.

  4. Probing Primordial Black Holes with upcoming Radio Telescopes: a case study for LOFAR2.0, FAST Core Array and BINGO

    astro-ph.CO 2026-04 unverdicted novelty 4.0 of 10

    LOFAR2.0, FAST Core Array and BINGO can constrain the PBH dark matter fraction f_PBH below 0.16-0.39 for masses above 10^{-2} to 10 solar masses via FRB lensing statistics.

  5. Probing Primordial Black Holes with upcoming Radio Telescopes: a case study for LOFAR2.0, FAST Core Array and BINGO

    astro-ph.CO 2026-04 conditional novelty 4.0 of 10

    LOFAR2.0, FAST Core Array and BINGO are forecast to bound f_PBH < 0.16 (M>1 Msun), <0.39 (M>10 Msun) and <0.39 (M>0.1 Msun) respectively from null FRB lensing.

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