Light speed variation from gamma ray burst GRB 160509A

It is postulated in Einstein's relativity that the speed of light in vacuum is a constant for all observers. However, the effect of quantum gravity could bring an energy dependence of light speed. Even a tiny speed variation, when amplified by the cosmological distance, may be revealed by the o...

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Bibliographic Details
Published in:Physics letters. B 2016-09, Vol.760 (C), p.602-604
Main Authors: Xu, Haowei, Ma, Bo-Qiang
Format: Article
Language:English
Subjects:
Gamma ray burst
High energy photon
Light speed
Lorentz invariance violation
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Summary:It is postulated in Einstein's relativity that the speed of light in vacuum is a constant for all observers. However, the effect of quantum gravity could bring an energy dependence of light speed. Even a tiny speed variation, when amplified by the cosmological distance, may be revealed by the observed time lags between photons with different energies from astrophysical sources. From the newly detected long gamma ray burst GRB 160509A, we find evidence to support the prediction for a linear form modification of light speed in cosmological space.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2016.07.044