Universal Charge-Radius Relation for Subatomic and Astrophysical Compact Objects
- Department of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C (Denmark)
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 4x10{sup 2} and 10{sup 4} fm the upper bound on the net charge is given by the universal relation Z=0.71R{sub fm}, and for larger radii (measured in femtometers or kilometers) Z=7x10{sup -5}R{sub fm}{sup 2}=7x10{sup 31}R{sub km}{sup 2}. For objects with nuclear density the relation corresponds to Z{approx_equal}0.7A{sup 1/3} (10{sup 8}<A<10{sup 12}) and Z{approx_equal}7x10{sup -5}A{sup 2/3} (A>10{sup 12}), where A is the baryon number. For some systems this universal upper bound improves existing charge limits in the literature.
- OSTI ID:
- 21123868
- Journal Information:
- Physical Review Letters, Vol. 100, Issue 15; Other Information: DOI: 10.1103/PhysRevLett.100.151102; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
Similar Records
UCI Staged Z Pinch
THE GASEOUS ENVIRONMENT OF HIGH-z GALAXIES: PRECISION MEASUREMENTS OF NEUTRAL HYDROGEN IN THE CIRCUMGALACTIC MEDIUM OF z {approx} 2-3 GALAXIES IN THE KECK BARYONIC STRUCTURE SURVEY