Astronomy and Astrophysics – Astrophysics
Scientific paper
1997-12-07
Nature 393:763-765,1998
Astronomy and Astrophysics
Astrophysics
LaTex. 9 pages. Version accepted for publication in Nature. (A few changes to the reference list. Additional comments on the a
Scientific paper
10.1038/31647
The recent confirmation that at least some gamma-ray bursters (GRBs) are indeed at cosmological distances raises the possibility that observations of these could provide interesting constraints on the fundamental laws of physics. Here we demonstrate that the fine-scale time structure and hard spectra of GRB emissions are very sensitive to the possible dispersion of electromagnetic waves in vacuo with velocity differences $\delta v \sim E/E_{\QG}$, as suggested in some approaches to quantum gravity. A simple estimate shows that GRB measurements might be sensitive to a dispersion scale $E_{QG}$ comparable to the Planck energy scale $E_{P} \sim 10^{19}$ GeV, sufficient to test some of these theories, and we outline aspects of an observational programme that could address this goal.
Amelino-Camelia Giovanni
Ellis John
Mavromatos Nick E.
Nanopoulos Dimitri V.
Sarkar Subir
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