Speaker
Description
Every low-mass star in the Milky Way can be expected to host at least one exoplanet on average. Since most stars are intrinsic X-ray emitters, practically every exoplanet known today is embedded in an X-ray radiation environment of some sort. Stellar high-energy emission can drive many phenomena on exoplanets: heating and evaporation of planetary atmospheres, photoionization in the upper atmosphere layers, and even direct consequences for planetary habitability. However, it is not only the stars that can influence their exoplanets; there is also growing evidence that exoplanets may influence their host stars through tidal and magnetic interaction. High-energy observations are a crucial component in the search for signatures of star-planet interactions. I will highlight recent developments in these fields, with a focus on relevant results from eROSITA.
