Equilibrium configurations of degenerate neutron stars with frozen-in superstrong magnetic fields

Astronomy and Astrophysics – Astronomy

Scientific paper

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Degenerate Matter, Magnetic Stars, Neutron Stars, Stellar Magnetic Fields, Stellar Mass, Magnetic Flux, Stellar Models

Scientific paper

Within the framework of the approximate energy method, the equilibrium mass of a degenerate magnetized neutron star is estimated as a function of the magnetic field intensity for a number of prescribed values of the matter density in the center of the star greater than about 1.67 x 10 exp 14 g/cu cm. It is shown that in the presence of a superstrong magnetic field in the center of the star (Hc is greater than about 10 exp 17 G), the mass of the magnetic star increases in comparison with the mass of an analogous star in the absence of the field. It is also shown that for a number of Hc values, the equilibrium magnetized neutron star may be stable. If the magnetic field Hc is as high as 10 exp 18 G, the contributions of the electron and neutron gases to the pressure in the stellar interior are nearly equal.

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