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Author
W. Essey
S. Ando
A. Kusenko
Year
2011
Title
Determination of intergalactic magnetic fields from gamma ray data
Journal
Astroparticle Physics
Volume | Issue number
35 | 3
Pages (from-to)
135-139
Document type
Article
Faculty
Faculty of Science (FNWI)
Institute
Institute for Theoretical Physics Amsterdam (ITFA)
Abstract
We report a measurement of intergalactic magnetic fields using combined data from Atmospheric Cherenkov Telescopes and Fermi Gamma-Ray Space Telescope, based on the spectral data alone. If blazars are assumed to produce both gamma rays and cosmic rays, the observed spectra are not sensitive to the intrinsic spectrum of the source, because, for a distant blazar, secondary photons produced along the line of sight dominate the signal. In this case, we set a limit 1 ~ 10^|17 G < B < 3 ~ 10^|14 G. If one excludes the cosmic-ray component, the 10^-17 G lower limit remains, but the upper limit depends on the spectral properties of the source. We present the allowed ranges for a variety of model parameters.
URL
go to publisher's site
Language
English
Permalink
http://hdl.handle.net/11245/1.354712

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