Magnetic monopoles in neutron stars

Physics – Nuclear Physics

Scientific paper

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Scientific paper

The effects of monopole-antimonopole annihilation on a previously reported bound [1] on the product of the galactic flux of grand unified magnetic monopoles and the cross section for monopole catalyzed nucleon decay: (FM/cm-2s-1sr-1)(σΔB/10-2 cm2) <= 10-22 are examined for several models of neutron star interiors. For neutron stars with superconducting interiors or large internal magnetic fields this bound is unaltered. In the unlikely event that old neutron stars are not superconducting and have internal magnetic fields Bint << 108 Gauss the effects of monopole-antimonopole annihilation relax the bound to (FM/cm-2 s-1 sr-1)(σΔB/10-27 cm-2)2 <= 10-18. Magnetic monopoles may also have a significant effect on the structure of the interior magnetic field in neutron stars.

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