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Title: Accretion disk radiation dynamics and the cosmic battery

We investigate the dynamics of radiation in the surface layers of an optically thick astrophysical accretion disk around a Kerr black hole. The source of the radiation is the surface of the accretion disk itself, and not a central object as in previous studies of the Poynting-Robertson effect. We generate numerical sky maps from photon trajectories that originate on the surface of the disk as seen from the inner edge of the disk at the position of the innermost stable circular orbit. We investigate several accretion disk morphologies with a Shakura-Sunyaev surface temperature distribution. Finally, we calculate the electromotive source of the Cosmic Battery mechanism around the inner edge of the accretion disk and obtain characteristic timescales for the generation of astrophysical magnetic fields.
Authors:
;  [1]
  1. Research Center for Astronomy and Applied Mathematics, Academy of Athens, Athens 11527 (Greece)
Publication Date:
OSTI Identifier:
22370491
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 794; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCRETION DISKS; ASTROPHYSICS; BLACK HOLES; COMPUTERIZED SIMULATION; KERR FIELD; LAYERS; MAGNETIC FIELDS; MAPS; ORBITS; PHOTONS; POYNTING THEOREM; SURFACES; TEMPERATURE DISTRIBUTION; TRAJECTORIES