Pulsar Radiation and Quantum Gravity
Astrophysics
2007-05-23 v1 General Relativity and Quantum Cosmology
Abstract
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.
Cite
@article{arxiv.astro-ph/9903464,
title = {Pulsar Radiation and Quantum Gravity},
author = {Philip Kaaret},
journal= {arXiv preprint arXiv:astro-ph/9903464},
year = {2007}
}
Comments
Accepted to Astronomy and Astrophysics Letters, 3 pages