A Fresh Look into the Interaction of Exoplanets Magnetosphere with Stellar Winds using MHD Simulations
arxiv(2024)
摘要
Numerous numerical studies have been carried out in recent years that
simulate different aspects of exoplanets' magnetosphere and stellar winds.
These studies have focused primarily on hot Jupiters with sun-like stars. This
study addresses the challenges inherent in utilizing existing MHD codes to
model hot Jupiter-star systems. Due to the scaling of the system and the
assumption of a uniformly flowing stellar wind at the outer boundary of the
simulation, MHD codes necessitate a minimum distance of greater than 0.4 au for
a Jupiter-like planet orbiting a sun-like star to avoid substantial violations
of the code's assumptions. Additionally, employing the GAMERA (Grid Agnostic
MHD for Extended Research Applications) MHD code, we simulate star-planet
interactions considering various stellar types (Sun-like and M Dwarf stars)
with both Jupiter-like and Earth-like planets positioned at varying orbital
distances. Furthermore, we explore the impact of tidal locking on the total
power within the magnetosphere-ionosphere systems.
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