Disk-Jet Connection in Agns and Microquasars: The Possibility of Thermal Flares in the Center

TL;DR

This paper explores the potential for thermal flares originating from the centers of AGNs and microquasars, proposing a model that explains certain optical and radio flare behaviors.

Contribution

It introduces a simple toy model demonstrating that thermal flares in the centers can account for observed optical and radio flare features, challenging jet-based explanations.

Findings

The toy model reproduces observed optical flare lightcurves.

Thermal flares can explain cases where only the second peak has a radio counterpart.

Preliminary results support the feasibility of central thermal flare origin.

Abstract

We discuss the possibility of thermal flares in centers of AGNs and microquasars. We present preliminary results of an ongoing study trying to assess the feasibility of a hypothesis suggesting that certain flares observed in these sources originate in the very centers of the systems and not in the relativistic jets. Using a simple toy model we reproduce optical flares with lightcurves very similar to those observed in the sources. The model suits especially well those cases where only the latter peak of a double-peaked optical flare has a radio counterpart.