Collapsing neutron stars driven by critical magnetic fields and exploding Bose-Einstein condensates

摘要

A Bose-Einstein condensate of a neutral vector boson bearing an anomalous magnetic moment is suggested as a model for ferromagnetic origin of magnetic fields in neutron stars. The vector particles are assumed to arise from parallel spin-paired neutrons. A negative pressure perpendicular to the external field B is acting on this condensate, which for large densities, compress the system, and may produce a collapse. An upper bound of the magnetic fields observable in neutron stars is given. In the the non-relativistic limit, the analogy with the behavior of exploding Bose-Einstein condensates (BEGs) for critical values of the magnetic field is briefly discussed.