Modelling the flaring emission at the Galactic Centre

TL;DR

This paper models the variable emission from Sgr A* at the Galactic Centre, analyzing the evolution of the emission region and providing light curves and spectra near the black hole's event horizon.

Contribution

It introduces a detailed model of the emission processes close to a Kerr black hole, focusing on variability and spectral features of Sgr A*'s emissions.

Findings

Light curves showing variability patterns

Time-resolved spectra near the event horizon

Insights into accretion disk emission mechanisms

Abstract

The massive black hole at the Galactic Centre is known to be variable in radio, millimeter, near-IR and X-rays. We investigate the physical processes responsible for the variable observed emissions from the compact radio source Sgr A*. We study the evolution of the variable emission region and present light curves and time-resolved spectra of emissions from the accretion disk, close to the event horizon, near the marginally stable orbit of a Kerr black hole.