[whswhs]

Originally Posted by DataPacRat

A possible line of attack: a magnetic field of 16 Tesla is strong enough to levitate a frog (or, presumably, any other organic matter that's subjected to such a field). A 10-15 km radius neutron star's magnetic field, at its surface, is between 10^4 and 10^11 Tesla (with magnetars being 10^8 and 10^11). Making the somewhat unwarranted assumption that the inverse square law applies, then at 242,000 km out (as close as it's safe for the speedster to approach, considering only gravity), then the field would be somewhere around 1/((242,000/10)^2) to 1/((242,000/15)^2) = 1/585,640,000 to 1/260,284,444 as strong, let's say 1/500M. Which would make the magnetic field at that distance 0.00002 to 200 Tesla. Which, making a further unwarranted assumption about diamagnetism, is a force somewhere between 'unnoticeable' and 'exerts 12.5 gravities of acceleration'.

Magnets are dipoles, and dipole fields follow an inverse cube law, once you get moderately far away from the source. Closer in, it's something more complicated—I forget the details, but I don't think it's a straightforward inverse square.