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A lensed FRB candidate in the first CHIME/FRB Catalogue and its potential implications

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arxiv 2406.19654 v2 pith:OCYJO5GU submitted 2024-06-28 astro-ph.HE

Chenming Chang , Songbo Zhang , Di Xiao , Zhenfan Tang , Ye Li , Junjie Wei , Xuefeng Wu This is my paper · ORCID
classification astro-ph.HE
keywords lensedcandidatecataloguefirstfrbslensingobjectradio
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Fast radio bursts (FRBs) are immensely energetic radio pulses with durations of milliseconds. Given their high all-sky rate, the probability of an FRB being lensed by an intervening massive object is non-negligible. In this study, we search for possible lensing candidates within the first Canadian Hydrogen Intensity Mapping Experiment FRB catalogue using an autocorrelation algorithm and verification through signal simulations. We identify FRB 20190308C as a lensed candidate with a significance of 3.4 sigma. Furthermore, we constrain the mass of the lensing object using the Chang-Refsdal lens model, based on the flux ratio and time delay between the substructures of FRB 20190308C. Future long-term and high-precision observations are expected to reveal more lensed FRBs.

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  1. Bounding the photon mass with gravitationally lensed fast radio bursts

    astro-ph.HE 2024-12 conditional novelty 6.0 of 10

    Using the time delay and flux ratio of the lensed FRB candidate FRB 20190308C, the authors derive an upper bound on the photon mass of 5.3e-42 kg for a lens shear of 0.01, and between 2.4e-42 and 2.1e-41 kg over the a...

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