The long-term spectroscopic misadventures of AG Dra with a nod toward V407 Cyg: Degenerates behaving badly

TL;DR

This paper investigates the long-term spectroscopic behavior of the symbiotic system AG Dra, analyzing environmental and orbital influences, and compares these findings with the 2010 nova outburst of V407 Cyg to understand underlying physical processes.

Contribution

It provides new insights into the spectroscopic variations of AG Dra and compares these with V407 Cyg's outburst, highlighting the complex behavior of such systems.

Findings

Spectroscopic variations are influenced by environment and orbital modulation.

Comparison reveals similarities and differences in physical processes between AG Dra and V407 Cyg.

Results contribute to understanding the behavior of eruptive symbiotic systems.

Abstract

We present some results of an ongoing study of the long-term spectroscopic variations of AG Dra, a prototypical eruptive symbiotic system. We discuss the effects of the environment and orbital modulation in this system and some of the physical processes revealed by a comparison with the nova outburst of the symbiotic-like recurrent nova V407 Cyg 2010.