Comment: Leaves a lot of data out of the story (Score 1) 50
Sun like stars, what composition are they, their ages, binary systems etc.
I would be curious if they could say what their rotational speeds were compared to our Sun, if these super flare stars have high rotational speeds it could provide enough twisting to create these.
The hot planet theory would mean the mass of the planet had to be high enough and the distance close enough that the gravity center was inside the star to stir it up enough I would think. The idea that some teleconnection or alignment could cause these to flare is okay, but another possibility is that a rocky planet with a mass of jupiter could be inside the flare as well hence not seeing it, or it's speed and the timing of the flare means it's gone around by the time the flare explodes.