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The Energetic Particle Population in Centaurus A

Published online by Cambridge University Press:  23 June 2017

Paula Chadwick Open the ORCID record for Paula Chadwick [Opens in a new window] ,
Anthony M. Brown ,
Celine Boehm ,
Jamie Graham ,
Thomas Lacroix  and
Joseph Silk
Paula Chadwick
Affiliation:
Dept. of Physics, University of Durham, South Road, Durham DH1 3LE, UK
Anthony M. Brown
Affiliation:
Dept. of Physics, University of Durham, South Road, Durham DH1 3LE, UK
Celine Boehm
Affiliation:
Dept. of Physics, University of Durham, South Road, Durham DH1 3LE, UK
Jamie Graham
Affiliation:
Dept. of Physics, University of Durham, South Road, Durham DH1 3LE, UK
Thomas Lacroix
Affiliation:
LAPTh U. de Savoie, CNRS, BP 110, 74941 Annecy-le-Vieux
Joseph Silk
Affiliation:
Institut d’Astrophysique de Paris, UMR 7095, CNRS, UPMC Université Paris 6, Sorbonne Université, 98 bis boulevard Arago, 75014 Paris, France Johns Hopkins University, Baltimore, MD 21218, United States
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Abstract

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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.

Keywords

gamma rays: observationsdark mattergalaxies: activepulsars: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S324: New Frontiers in Black Hole Astrophysics , September 2016 , pp. 211 - 214
Copyright
Copyright © International Astronomical Union 2017 

References

Boehm, C., Fayet, P., & Silk, J. 2004, Phys. Rev. D., 69, 101302 Google Scholar
Brown, A. M. & Adams, J. 2011, Monthly Notices of the Royal Astronomical Society, 413, 2785 Google Scholar
Fermi-LAT, Falcone, , A., et al. 2010, Astrophysical Journal, 719, 1433 Google Scholar
Fermi-LAT, Abdo, , A. A., et al. 2010, Science, 328, 725 Google Scholar
Fermi-LAT, Abdo, , A. A., et al. 2010, Astrophysical Journal Supplement, 218, 23 Google Scholar
Gondolo, P. & Silk, J. 1999, Physical Review Letters, 83, 1719 CrossRefGoogle Scholar
Goodenough, L. & Hooper, D. 2009, ArXiv e-prints 0910.2998Google Scholar
S, H. E. S. Aharonian, F., et al. 2009, Astrophysical Journal Letters, 695, L40 Google Scholar
Navarro, J. F., Frenk, C. S., & White, S. D. M. 1996, Astrophysical Journal, 462, 563 Google Scholar
Nolan, P. L., et al. 2012, Astrophysical Journal Supplement, 199, 31 Google Scholar
Petropoulou, M., et al. 2014, Astronomy & Astrophysics, 562, A12 CrossRefGoogle Scholar
Rejkuba, M. 2004, Astronomy & Astrophysics, 413, 903 Google Scholar
Sahakyan, , et al., 2013, Astrophysical Journal Letters, 770, L6 Google Scholar
Sreekumar, P., et al. 1999, Astroparticle Physics, 11, 221 Google Scholar
Zurek, K. M. 2009, Phys. Rev. D., 115002, 0811.4429Google Scholar