Modelling the flare activity of Sgr A*

TL;DR

This paper models the flare activity of Sgr A* by analyzing emissions from its accretion disk near the event horizon, using observational data to understand variability.

Contribution

It introduces a detailed physical model of Sgr A*'s variable emissions focusing on the accretion disk close to the black hole's event horizon.

Findings

Emission variability linked to accretion disk dynamics

Light curves and spectra consistent with observational data

Insights into processes near the black hole's marginally stable orbit

Abstract

Latest observational data provides evidence that the emissions from Sgr A* originate from an accretion disc within ten gravitational radii of the dynamical centre of Milky Way. 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 analyse light curves and time-resolved spectra of emissions originated at the surface of the accretion disk, close to the event horizon, near the marginally stable orbit of a Kerr black hole.