Light speed variation from gamma ray burst GRB 160509A
Haowei Xu, Bo-Qiang Ma
TL;DR
This paper investigates potential energy-dependent variations in the speed of light using observations from gamma-ray burst GRB 160509A, providing evidence supporting a linear modification of light speed over cosmological distances.
Contribution
It presents observational evidence for a linear energy dependence of light speed, challenging the assumption of constant light speed in Einstein's relativity.
Findings
Evidence for linear light speed variation from GRB 160509A
Supports quantum gravity theories predicting energy dependence
Implications for fundamental physics and cosmology
Abstract
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.
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