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A lower bound on the local extragalactic magnetic field

Luis A. Anchordoqui·Haim Goldberg
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Abstract

Assuming that the hard gamma-ray emission of Cen A is a result of synchrotron radiation of ultra-relativistic electrons, we derive a lower bound on the local extragalactic magnetic field, $B> 10^{-8}$ G. This result is consistent with (and close to) upper bounds on magnetic fields derived from consideration of cosmic microwave background distortions and Faraday rotation measurements.

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Luis A. Anchordoqui, Haim Goldberg. 2001-10-16. A lower bound on the local extragalactic magnetic field. https://doi.org/10.1103/physrevd.65.021302

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