A lower bound on the local extragalactic magnetic field

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.

Includes extensive discussion of particle acceleration above 10^20 eV in the hot spot-like region of Cen A

References in corpus (1)

• An Auger test of the Cen A model of highest energy cosmic rays

Cited by in corpus (13)

• Astrophysical Origins of Ultrahigh Energy Cosmic Rays
• Ultrahigh Energy Cosmic Rays: The state of the art before the Auger Observatory
• Milestones in the Observations of Cosmic Magnetic Fields
• Neutrino diagnostics of ultra-high energy cosmic ray protons
• Nearly Minimal Magnetogenesis
• Large Scale Magnetic Fields and the Number of Cosmic Ray Sources above 10^(19) eV
• The Centaurus A Ultrahigh-Energy Cosmic Ray Excess and the Local Extragalactic Magnetic Field
• Nearby quasar remnants and ultra-high energy cosmic rays
• Update on tests of the Cen A neutron-emission model of highest energy cosmic rays
• A short survey of matter-antimatter evolution in the primordial universe
• Bound on the Photon Charge from the Phase Coherence of Extragalactic Radiation
• Anisotropy at the end of the cosmic ray spectrum?
• Astrophysical Bounds on the Photon Charge and Magnetic Moment