• DOI:10.1103/PhysRevLett.100.151102
• Corpus ID: 36502877

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
        }
}

• J. Madsen
• Published 14 April 2008
• Physics
• Physical review letters

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 the relation corresponds to Z approximately 0.7A(1/3)( (10(8)10(12)), where A is the baryon number. For some systems this universal upper bound improves existing charge limits in the literature.