# Universal charge-radius relation for subatomic and astrophysical compact objects.

@article{Madsen2008UniversalCR, title={Universal charge-radius relation for subatomic and astrophysical compact objects.}, author={Jes Madsen}, journal={Physical review letters}, year={2008}, volume={100 15}, pages={ 151102 } }

Electron-positron pair creation in supercritical electric fields limits the net charge of any static, spherical object, such as superheavy nuclei, strangelets, and Q balls, or compact stars like neutron stars, quark stars, and black holes. For radii between 4 x 10(2) and 10(4) fm the upper bound on the net charge is given by the universal relation Z=0.71R(fm), and for larger radii (measured in femtometers or kilometers) Z=7 x 10(-5)R_(2)(fm)=7 x 10(31)R_(2)(km). For objects with nuclear density…

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