The neutron-star oscillations model for gamma-ray bursts

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Gamma Ray Bursts, Neutron Stars, Stellar Magnetic Fields, Stellar Models, Stellar Oscillations, Electromagnetic Fields, Electron-Positron Pairs, Magnetic Moments, Pair Production, Quadrupoles

Scientific paper

Exact analytic expressions for the vacuum electromagnetic fields produced by an oscillating magnetized sphere are obtained. The solutions are analyzed for various modes of pulsation and for low-order multipole magnetic moments. Within the context of neutron star oscillations, the possibility of gamma-ray generation is discussed. It is shown that the radial pulsations provide an efficient mechanism for generation of gamma-radiation and electron-positron pairs in some regions around the neutron star. For this, the nonvanishing quadrupole magnetic moment oblique to the dipole moment is required. The model for gamma-ray bursts is briefly considered.

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