Interactions between exoplanets and the winds of young stars

The topology of the magnetic field of young stars is important not only for the\ud investigation of magnetospheric accretion, but also responsible in shaping the large-scale\ud structure of stellar winds, which are crucial for regulating the rotation evolution of stars.\ud Because winds of young stars are believed to have enhanced mass-loss rates compared\ud to those of cool, main-sequence stars, the interaction of winds with newborn exoplanets\ud might a ect the early evolution of planetary systems. This interaction can also give\ud rise to observational signatures which could be used as a way to detect young planets,\ud while simultaneously probing for the presence of their still elusive magnetic fields. Here,\ud we investigate the interaction between winds of young stars and hypothetical planets.\ud For that, we model the stellar winds by means of 3D numerical magnetohydrodynamic\ud simulations. Although these models adopt simplified topologies of the stellar magnetic\ud field (dipolar fields that are misaligned with the rotation axis of the star), we show that\ud asymmetric field topologies can lead to an enhancement of the stellar wind power, resulting\ud not only in an enhancement of angular momentum losses, but also intensifying and\ud rotationally modulating the wind interactions with exoplanet