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

• Published in: Physics letters. B Vol. 820; p. 136518
• Main Authors: Zhu, Jie, Ma, Bo-Qiang
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 10.09.2021; Elsevier
• Subjects: Gamma ray burst; Light speed variation; Lorentz invariance violation; Pre-burst; Light speed variation; Pre-burst; Gamma ray burst; Lorentz invariance violation
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/j.physletb.2021.136518

Previous researches on high-energy photon events from gamma-ray bursts (GRBs) suggest a light speed variation v(E)=c(1−E/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.