Star-Planet magnetic interactions – A. F. Lanza ( INAF OACT )

I shall review some phenomena possibly related to the magnetic interaction between late-type stars and close-in massive planets and discuss models proposed for their interpretation. I shall consider the possible effects of hot Jupiters on stellar chromospheric emission and on stellar rotation. On the other hand, magnetic reconnection between stellar and planetary magnetic fields may enhance the evaporation of the closest planets (i.e., those with an orbital semimajor axis smaller than about 0.05 AU) adding to the effect of the extreme ultraviolet flux coming from the outer stellar atmospheres.