Stellar magnetic activity and Star-Planet Interactions (invited review)

TL;DR

This review discusses how stellar magnetic activity influences exoplanet formation, evolution, and detection, emphasizing the role of star-planet interactions and recent advances in understanding these phenomena.

Contribution

It provides a comprehensive overview of recent theoretical and observational findings on stellar magnetic activity and its impact on exoplanets, highlighting future research directions.

Findings

Magnetic phenomena affect exoplanet atmospheres and mass loss.

Star-planet interactions may influence stellar magnetic evolution.

Understanding stellar activity is crucial for accurate exoplanet detection.

Abstract

Stellar magnetic activity is an important factor in the formation and evolution of exoplanets. Magnetic phenomena like stellar flares, coronal mass ejections, and high-energy emission affect the exoplanetary atmosphere and its mass loss over time. One major question is whether the magnetic evolution of exoplanet host stars is the same as for stars without planets; tidal and magnetic interactions of a star and its close-in planets may play a role in this. Stellar magnetic activity also shapes our ability to detect exoplanets with different methods in the first place, and therefore we need to understand it properly to derive an accurate estimate of the existing exoplanet population. Here I review recent theoretical and observational results, as well as outline some avenues for future progress.