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Type: Journal article
Title: Limits on an energy dependence of the speed of light from a flare of the active galaxy PKS 2155-304
Author: Aharonian, F.
Akhperjanian, A.
Barres de Almaida, U.
Bazer-Bachi, A.
Becherini, Y.
Behera, B.
Beilicke, M.
Benbow, W.
Bernlohr, K.
Boisson, C.
Bochow, A.
Borrel, V.
Braun, I.
Brion, E.
Brucker, J.
Brun, P.
Buhler, R.
Bulik, T.
Busching, I.
Boutelier, T.
et al.
Citation: Physical Review Letters, 2008; 101(17):170402-1-170402-5
Publisher: American Physical Soc
Issue Date: 2008
ISSN: 0031-9007
Statement of
F. Aharonian...G. Rowell...and A. al.(H.E.S.S. Collaboration)
Abstract: In the past few decades, several models have predicted an energy-dependence of the speed of light in the context of quantum gravity. For cosmological sources such as active galaxies, this minuscule effect can add up to measurable photon-energy dependent time lags. In this paper a search for such time lags during the H.E.S.S. observations of the exceptional very high energy flare of the active galaxy PKS 2155-304 on 28 July in 2006 is presented. Since no significant time lag is found, lower limits on the energy scale of speed of light modifications are derived.
Keywords: Astrophysics (astro-ph)
Rights: ©2008 American Physical Society
RMID: 0020083373
DOI: 10.1103/PhysRevLett.101.170402
Appears in Collections:Physics publications

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