The Puzzle of V407 Cygni

Abstract

We discuss the nature and recent observations (optical and gamma-rays) of symbiotics binary/Mira variable V407 Cygni. In addition we discuss another object of similar category, namely the variable star FY Aql with possible association with an eruptive gamma-ray source.

Keywords

• variable stars
• Mira variables
• symbiotic stars
• gamma-rays
• gamma-ray transients