Pulsar Radiation and Quantum Gravity

Details Pulsar Radiation and Quantum Gravity Pulsar Radiation and Quantum Gravity

1999-03-30

arxiv.org/abs/astro-ph/9903464v1

Astronomy and Astrophysics

Astrophysics

Accepted to Astronomy and Astrophysics Letters, 3 pages

Scientific paper

Quantum gravity may lead to an energy dependence in the speed of light. The high energy radiation from gamma-ray pulsars can be used to place limits on such effects. We find that emission from the Crab pulsar at energies above 2 GeV trails that at 70-100 MeV by no more than 0.35 ms (95% confidence) and place a lower bound on the energy scale of quantum gravitational effects on the speed of light of 1.8 x 10^15 GeV. This bound might be improved by two orders of magnitude by observation of pulsations from the Crab at higher energies, 50-100 GeV, in the near future.

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