I was looking some stuff up regarding a high-energy event in 774-775 in another thread and ran across an article about superflares.
Although the Wikipedia article states that there is no evidence that it's ever happened in our system, I was curious to know what such evidence would be. The article says that the former idea was that a star links to a Hot Jupiter, but observations suggest otherwise, leading researchers to think it's small rocky planets instead. They also say that Mercury is too far from the sun for this process. However, I wonder if that was the case in the early solar system when the sun was hotter and other bodies (or existing bodies?) might have been closer to the sun.Scientists think that solar flares are driven by the sun's magnetic field lines—invisible, tightly wound loops of energy connected to magnetically active regions known as sunspots. When a field line snaps, it whips an arc of light and charged particles away from the sun and into space. According to the widely accepted theory, a similar mechanism likely powers superflares, except that instead of being anchored to two star spots, a magnetic field line rises from the star and connects to a nearby hot Jupiter. Only by anchoring one end of the field line to another object can a star create a magnetic loop large enough to generate a truly immense flare when it snaps, Schaefer explained.
Even with the new data, Schaefer thinks the model linking planets to superflares can work—it just needs a few tweaks. For example, instead of using a hot Jupiter as an anchor, superflare stars may be using closely orbiting rocky planets—hot Earths or hot super-Earths—to ground their magnetic field lines.
Furthermore, if superflares had happened in the distant past in our system, could they have had an effect on some processes that we wonder about.
Could superflares have been good or bad for the development of life on Earth and elsewhere in the system?
Could a magnetic connection event have occured with Venus and might such an energy-dump have had any effect on it's rotation or internal heating and resurfacing events?
What might be the effect on Mars with regard to its atmosphere and hydrology?
Would a superflare have an effect on more distant objects, like asteroids or even comets, perhaps producing thrust and orbital perturbations leading to eventual impacts with other bodies?