Exploring Quantum Gravity with Very-High-Energy Gamma-Ray Instruments - Prospects and Limitations

Simple item page
dc.creatorWagner, Robert
dc.date2009-01-20
dc.date.accessioned2026-07-07T13:06:15Z
dc.date.available2026-07-07T13:06:15Z
dc.descriptionSome models for quantum gravity (QG) violate Lorentz invariance and predict an energy dependence of the speed of light, leading to a dispersion of high-energy gamma-ray signals that travel over cosmological distances. Limits on the dispersion from short-duration substructures observed in gamma-rays emitted by gamma-ray bursts (GRBs) at cosmological distances have provided interesting bounds on Lorentz invariance violation (LIV). Recent observations of unprecedentedly fast flares in the very-high energy gamma-ray emission of the active galactic nuclei (AGNs) Mkn 501 in 2005 and PKS 2155-304 in 2006 resulted in the most constraining limits on LIV from light-travel observations, approaching the Planck mass scale, at which QG effects are assumed to become important. I review the current status of LIV searches using GRBs and AGN flare events, and discuss limitations of light-travel time analyses and prospects for future instruments in the gamma-ray domain.
dc.description11 pages, 4 figures, proceedings of "Science with the New Generation of High Energy Gamma-Ray Experiments", Euganean Spa Area, Padova: October 8-10, 2008
dc.identifierhttps://arxiv.org/abs/0901.2932
dc.identifierhttp://arxiv.org/abs/0901.2932
dc.identifierAIP Conf.Proc.1112:187-197,2009
dc.identifierdoi:10.1063/1.3125781
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/227720
dc.subjectHigh Energy Astrophysical Phenomena
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleExploring Quantum Gravity with Very-High-Energy Gamma-Ray Instruments - Prospects and Limitations
dc.typetext

Files

Collections

arXiv