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Limits on the Weak Equivalence Principle and Photon Mass with FRB 121102 Sub-pulses

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arxiv 1907.00583 v1 pith:5ZEIL62T submitted 2019-07-01 astro-ph.HE

Nan Xing , He Gao , Junjie Wei , Zhengxiang Li , Weiyang Wang , Bing Zhang , Xue-Feng Wu , Peter Mészáros This is my paper · ORCID
classification astro-ph.HE
keywords gammamassphotonsub-pulsestimesburstsdelayequivalence
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abstract

Fast radio bursts (FRBs) are short duration ($\sim$millisecond) radio transients with cosmological origin. The simple sharp features of the FRB signal have been utilized to probe two fundamental laws of physics, namey, testing Einstein's weak equivalence principle and constraining the rest mass of the photon. Recently, \cite{hessels18} found that after correcting for dispersive delay, some of the bursts in FRB 121102 have complex time-frequency structures that include sub-pulses with a time-frequency downward drifting property. Using the delay time between sub-pulses in FRB 121102, here we show that the parameterized post-Newtonian parameter $\gamma$ is the same for photons with different energies to the level of $\left|\gamma_1-\gamma_2\right|<2.5\times 10^{-16}$, which is 1000 times better than previous constraints from FRBs using similar methods. We also obtain a stringent constraint on the photon mass, $m_{\gamma} < 5.1\times10^{-48}$ g, which is 10 times smaller than previous best limits on the photon mass derived through the velocity dispersion method.

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Cited by 4 Pith papers

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  1. Two new highly scattered fast radio bursts: evidence for scatter broadening by the circumsource medium

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  2. 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...

  3. Cosmological-model independent limits on photon mass from FRB and SNe data

    astro-ph.CO 2025-04 conditional novelty 5.0 of 10

    From 68 fast radio bursts and 1048 supernovae, the authors find a photon rest mass of roughly 18 to 29 times 10^-51 kilograms depending on the assumed intergalactic gas fraction, with zero mass still allowed at 2 to 3 sigma.

  4. Relativistic Astronomy. III. test of special relativity via Doppler effect

    astro-ph.HE 2019-08 conditional novelty 5.0 of 10

    Doppler measurements from a fast space probe could test special relativity, but the paper's own estimates show the precision would be far worse than existing lab experiments.

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