Authors: A.A. Vidotto
Published: 2025-05-30
DOI: 10.1146/annurev-astro-021225-030604
Source: Full article
There are several physical processes that mediate the interaction between an exoplanet and its host star, with the four main ones being due to magnetic, particle (stellar outflow), radiative, and tidal interactions. These interactions can be observed at different wavelengths, from X-ray to radio. Their strengths depend on the architecture of planetary systems, as well as the age and activity level of the host stars. In particular, exoplanets in close-in orbits and/or orbiting active host stars can experience strong physical interactions, some of which are negligible or absent in the present-day Solar System planets. Here, I present an overview of star–planet interactions (SPIs) through the lens of three-dimensional (3D) numerical models. The main conclusions are as follows: