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Jan 20, 2019 at 0:04 comment added esnii I've been looking into it further and seems that atmospheric interaction is indeed the big issue here. While high energy particles can cause some effects on the surface through air showers, it seems normal solar wind particles only go up to about 10 keV. Solar energetic particles can go much higher, but they look too rare to be significant. With a hotter star I assume the energies would be raised, but given that the energies required for penetrating our atmosphere are so high I suspect it still wouldn't work. On the other hand, at least UV emission is much easier to calculate!
Jan 19, 2019 at 14:39 comment added Nepene Nep The earth's magnetic field isn't protective because it stops particles that would hit us, mostly. The sort of charged particles that it deflects tend to interact with our atmosphere very well. The issue with them is that they strip our upper atmosphere, thus leaving us without a protective ozone layer and with less atmosphere in the long run. Standing under the aurora borealis, notably, isn't dangerous. UV can bypass some segments of the atmosphere (If there's no ozone) and magnetic fields don't bend light rays.
Jan 19, 2019 at 3:15 comment added esnii I'm not expecting the magnetic field to be directly hazardous, but rather from charged particles in the stellar wind being funneled to the surface along the magnetic poles as occurs in our polar regions. UV is definitely going to be an issue too though, and both types will need some consideration on the atmosphere, since at least with Earth's magnetic field the lower-energy particles that can be funneled tend to be blocked by that atmosphere before reaching the surface. This may not be an issue with a stronger magnetic field that can funnel higher energy particles, but I'm not sure.
Jan 19, 2019 at 2:52 history answered Nepene Nep CC BY-SA 4.0