Magnetic field screening in strong crossed electromagnetic fields

Campion, S. and Rueda, J. A. and Xue, S. S. and Ruffini, R. (2022) Magnetic field screening in strong crossed electromagnetic fields. Il nuovo cimento C, 45 (5). pp. 1-4. ISSN 1826-9885

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The gravitomagnetic interaction of a rotating black hole (BH) with a surrounding magnetic field, aligned and parallel to the BH axis, leads to an electric field with strength proportional to the magnetic field. Here, we study the magnetic field screening process in proportional electric and magnetic fields, operated by the combination of the motion of a huge number of electron-positron pairs, the production of synchrotron photons by the pairs, and the magnetic pair production process. We simulate this process for an initial magnetic field of the order of 1012 G and a seed of 1010 pairs. We obtain a reduction of the magnetic field strength of a few percent in a timescale shorter than femtoseconds. These results might have consequences on the high-energy (GeV) emission of astrophysical systems like gamma-ray bursts (GRBs). The reduction of the magnetic field strength implies a less efficient magnetic pair production, increasing the probability of GeV photons to leave the system.

Item Type: Article
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 06 Sep 2022 12:56
Last Modified: 06 Sep 2022 12:56

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