Superdense stars in the quantum limit of frozen-in superstrong magnetic fields

Astronomy and Astrophysics – Astronomy

Scientific paper

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Field Strength, Pulsars, Stellar Magnetic Fields, Stellar Structure, Charged Particles, Density (Mass/Volume), Electron Plasma, Electron-Positron Pairs, Ideal Gas, Pair Production

Scientific paper

Physical conditions in the interior of a standard pulsar with a frozen-in superstrong magnetic field are examined. The quantum limit of superstrong magnetic fields with a zero Landau level is employed to estimate the magnetic-field intensities at which the degree of degeneracy changes and at which the perfect-gas approximation breaks down for the ultrarelativistic electron and nonrelativistic proton gases within superdense matter at nuclear matter densities. It is concluded that the perfect-gas approximation is valid up to surface magnetic-field intensities of approximately 2.1 by 10 to the 13th power gauss and that spontaneous electron-positron pair production will occur throughout the whole interior of a neutron star if the surface magnetic field attains an intensity of about 2.1 by 10 to the 16th power gauss

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