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Are black holes totally black?

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Abstract

Geodesic completeness needs that near the horizon of a black hole there exist “white hole” geodesics, coming from the region inside the horizon. We give a classification of all such geodesics with energies E/m ≤ 1 for the Schwarzschild and Kerr black holes. Collisions of particles moving along the “white hole” geodesics with those moving along “black hole” geodesics are considered. Formulas for the increase in the energy of collision in the centre of mass frame are obtained, and the possibility of observation of high energy particles arriving from a black hole on the Earth is discussed.

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Authors and Affiliations

  1. A. Friedmann Laboratory for Theoretical Physics, St. Petersburg, Russia

    A. A. Grib & Yu. V. Pavlov

  2. Copernicus Center for Interdisciplinary Studies, Kraków, Poland

    A. A. Grib & Yu. V. Pavlov

  3. Theoretical Physics and Astronomy Department, The Herzen University, Moika 48, St. Petersburg, 191186, Russia

    A. A. Grib

  4. Institute of Problems in Mechanical Engineering, Russian Academy of Sciences, Bol’shoi pr. 61, St. Petersburg, 199178, Russia

    Yu. V. Pavlov

Authors
  1. A. A. Grib
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  2. Yu. V. Pavlov
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Correspondence to A. A. Grib.

Additional information

Based on a plenary talk given at the 15th Russian Gravitational Conference—International Conference on Gravitation, Cosmology and Astrophysics (RUSGRAV-15), June 30–July 5, 2014, Kazan, Russia.

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Grib, A.A., Pavlov, Y.V. Are black holes totally black?. Gravit. Cosmol. 21, 13–18 (2015). https://doi.org/10.1134/S0202289315010065

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  • DOI: https://doi.org/10.1134/S0202289315010065

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