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Speaker |
MACGIBBON, JANE |
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Co-autors |
Jane H MacGibbon, B.J. Carr and Don N. Page |
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Talk Title |
Do Evaporating Black Holes Form Photospheres and/or Chromospheres? |
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Abstract |
Several authors have claimed that the observable Hawking emission from a microscopic black hole is significantly modified by the formation of a photosphere or chromosphere around the black hole due to QED or QCD interactions between the emitted particles. Analyzing these models we identify a number of physical and geometrical effects which invalidate these scenarios. In all cases, we find that the observational signatures of a cosmic or Galactic halo background of primordial black holes or an individual black hole remain essentially those of the standard Hawking model, with little change to the detection probability. We note, though, that inner bremsstrahlung photons generated by charged particles as they accelerate away from the black hole dominate over the direct Hawking emission of photons at low photon frequencies. |
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