Mathematics – Logic
Scientific paper
Aug 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994mpi..rept.....p&link_type=abstract
Technical Report, Max-Planck-Inst. für Physik Munich, Germany
Mathematics
Logic
Gamma Ray Bursts, Active Galactic Nuclei, Interstellar Magnetic Fields, Intergalactic Media, Universe, Time Lag, Cosmology, Compton Effect, Energy Spectra
Scientific paper
The detection of cosmological primordial magnetic fields would allow far-reaching conclusions about the physics of the early universe. These intergalactic fields are probably very weak today, and new ideas are necessary to allow their detection. One possibility is to measure gamma rays delayed by the action of an intergalactic field on cascaded electrons with respect to pulses of very high energy gamma rays from cosmological sources. A specific signature in the energy versus delay time diagram, making it possible to separate this effect from unrelated source effects, is presented. Using active galactic nuclei and gamma-ray bursts as sources, the method could be sensitive down to about 10-26 G, thus capable to extend existing limits on an universal intergalactic magnetic field by about 17 orders of magnitude. Delayed events with a hard energy spectrum after gamma-ray bursts, recently detected by the EGRET experiment, could be due to the discussed effect.
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