Planetary Nebulae: What can they tell us about close binary evolution?

TL;DR

This paper discusses how planetary nebulae with binary central stars serve as important tools for understanding binary evolution, highlighting recent discoveries and future research directions.

Contribution

It emphasizes the significance of binary central stars in planetary nebulae for studying binary evolution and presents current understanding and future prospects.

Findings

Binary pathways are responsible for many planetary nebulae.

The only known super-Chandrasekhar mass binary inside a planetary nebula.

Binary central stars are key to understanding diverse astrophysical phenomena.

Abstract

It is now clear that a binary pathway is responsible for a significant fraction of planetary nebulae, and the continually increasing sample of known central binaries means that we are now in a position to begin to use these systems to further our understanding of binary evolution. Binary central stars of planetary nebulae are key laboratories in understanding the formation processes of a wide-range of astrophysical phenomena - a point well-illustrated by the fact that the only known double-degenerate, super-Chandrasekhar mass binary which will merge in less than a Hubble time is found inside a planetary nebula. Here, I briefly outline our current understanding and avenues for future investigation.