Origin of Intense Magnetic Fields Near Black Holes Due to Non-Minimal Gravitational-Electromagnetic Coupling

TL;DR

This paper proposes that non-minimal gravitational-electromagnetic coupling (NMGEC) can explain the intense magnetic fields observed near black holes and neutron stars, providing a plausible astrophysical origin for these fields.

Contribution

The study demonstrates that NMGEC can account for magnetic fields of 10^{15}-10^{16} Gauss near compact objects, offering a novel explanation for their origin.

Findings

NMGEC explains intense magnetic fields near black holes and neutron stars.

Magnetic fields of 10^{15}-10^{16} Gauss are consistent with NMGEC predictions.

NMGEC provides a plausible astrophysical mechanism for magnetic field generation.

Abstract

The origin of magnetic fields in astrophysical objects is a challenging problem in astrophysics. Throughout the years, many scientists have suggested that non-minimal gravitational-electromagnetic coupling (NMGEC) could be the origin of the ubiquitous astrophysical magnetic fields. We investigate the possible origin of intense magnetic fields $\sim 10^{15}-10^{16}$ by NMGEC near rotating neutron stars and black holes, connected with magnetars, quasars, and gamma-ray bursts. Whereas these intense magnetic fields are difficult to explain astrophysically, we find that they are easily explained by NMGEC.