Synchrotron Radiation From Weakly Magnetized Schwarzschild Black Hole

TL;DR

This paper investigates the synchrotron radiation emitted by a charged particle in a bound orbit around a weakly magnetized Schwarzschild black hole, focusing on the particle's energy loss and orbital decay due to radiation.

Contribution

It provides a detailed analysis of synchrotron radiation effects on charged particles in nongeodesic orbits near Schwarzschild black holes with magnetic fields, including power and energy loss calculations.

Findings

Charged particles in bound orbits emit synchrotron radiation.

Radiation causes decay of nongeodesic orbits to circular orbits.

Quantitative estimates of radiated power and energy loss.

Abstract

We consider a synchrotron radiation from a charged particle moving in a bound orbit around a weakly magnetized Schwarzschild black hole (a static black hole immersed into a constant uniform magnetic field) in its equatorial plane, perpendicular to the magnetic field. In particular, we study the case when the Lorentz force acting on the charged particle is directed outward from the black hole. The particle is initially moving in a nongeodesic bound orbit which due to synchrotron radiation decays to a nongeodesic circular orbit. We study this transition and calculate the radiated power and energy loss of the particle.