Neutron Star Composition in Strong Magnetic Fields

¹Japan Atomic Energy Research Institute, Tokai, Naka, Ibaraki 319-1195, Japan ²China Institute of Atomic Energy, PO Box 275(18), Beijing 102413 ³Institut für Theoretische Physik der J. W. Goethe-Universität, Postfach 11 19 32, D-60054 Frankfurt am Main, Germany ⁴Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna, Russia and CSNSM-IN2P3, Orsay, France

Published Date: July 31, 2003

Abstract

We study the neutron star composition in the presence of a strong magnetic field. The effects of the anomalous magnetic moments of both nucleons and electrons are investigated in relativistic mean field calculations for a β-equilibrium system. Since neutrons are fully spin polarized in a large field, generally speaking, the proton fraction can never exceed the field free case. An extremely strong magnetic field may lead to a pure neutron matter instead of a proton-rich matter.

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