The newborn black hole in GRB 191014C proves that it is alive

A multi-decade theoretical effort has been devoted to finding an efficient mechanism to use the rotational and electrodynamical extractable energy of a Kerr-Newman black hole (BH), to power the most energetic astrophysical sources such as gamma-ray bursts (GRBs) and active galactic nuclei. We show an efficient general relativistic electrodynamical process which occurs in the inner engine of a binary driven hypernova. The inner engine is composed of a rotating Kerr BH of mass M and dimensionless spin parameter alpha, a magnetic field of strength B-0 aligned and parallel to the rotation axis, and a very low-density ionized plasma. Here, we show that the gravitomagnetic interaction between the BH and the magnetic field induces an electric field that accelerates electrons and protons from the environment to ultrarelativistic energies emitting synchrotron radiation. We show that in GRB 190114C the BH of mass M=4.4 M-circle dot, alpha =0.4, and B-0 approximate to 4x10(10) G can lead to a high-energy (greater than or similar to GeV) luminosity of 10(51) erg s(-1). The inner engine parameters are determined by requiring (1) that the BH extractable energy explains the GeV and ultrahigh-energy emission energetics, (2) that the emitted photons are not subjected to magnetic-pair production, and (3) that the synchrotron radiation timescale agrees with the observed high-energy timescale. We find for GRB 190114C a clear jetted emission of GeV energies with a semi-aperture angle of approximately 60 degrees with respect to the BH rotation axis.

Automated summary

This passage describes an efficient general relativistic electrodynamical process occurring in the inner engine of a binary-driven hypernova, utilizing the gravitomagnetic interaction between a rotating black hole and a magnetic field to produce high-energy synchrotron radiation, explaining the phenomenon of high-energy emission in gamma-ray bursts.