Hi everyone- I'm new to this enterprise of Plutonian speculation; could someone direct me to a source that has decent information about its potential to have a magnetosphere?

I'm trying to make sense of that heart shape, as it extends, saddle-like, around the southern pole. Alternatively, could there a possible gravitational influence involving Charon, as I think the "heart" is bisected opposite of the tidally-locked, Charon-facing prime meridian? Could it be a reverse marker of the heart's proportion of sun-facing time, given its quite complex solar orbital attitude?

Or...are these just adorable newbie intuitions and/or possiible misconceptions that have already been addressed in this forum?

Thanks,

Mike