Elsevier

Physics Letters B

Volume 820, 10 September 2021, 136518
Physics Letters B

Pre-burst events of gamma-ray bursts with light speed variation

https://doi.org/10.1016/j.physletb.2021.136518Get rights and content
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Abstract

Previous researches on high-energy photon events from gamma-ray bursts (GRBs) suggest a light speed variation v(E)=c(1E/ELV) with ELV=3.6×1017 GeV, together with a pre-burst scenario that hight-energy photons come out about 10 seconds earlier than low-energy photons at the GRB source. However, in the Lorentz invariance violating scenario with an energy dependent light speed considered here, high-energy photons travel slower than low-energy photons due to the light speed variation, so that they are usually detected after low-energy photons in observed GRB data. Here we find four high-energy photon events which were observed earlier than low-energy photons from Fermi Gamma-ray Space Telescope (FGST), and analysis on these photon events supports the pre-burst scenario of high energy photons from GRBs and the energy dependence of light speed listed above.

Keywords

Light speed variation
Gamma ray burst
Pre-burst
Lorentz invariance violation

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