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The Energetic Particle Population in Centaurus A

  • Paula Chadwick (a1), Anthony M. Brown (a1), Celine Boehm (a1), Jamie Graham (a1), Thomas Lacroix (a2) and Joseph Silk (a3) (a4)...

Abstract

We report a significant hardening of the Fermi-LAT gamma-ray spectrum from the core of Cen A at E > 2.4 GeV, suggesting there is a source of high energy particles in the core of Cen A which is in addition to the jet component. We show that the observed gamma-ray spectrum is compatible with either a spike in the dark matter halo profile or a population of millisecond pulsars. This work gives a strong indication of new gamma-ray production mechanisms in active galactic nuclei and could even provide evidence for the clustering of heavy dark matter particles around black holes.

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References

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