A model for soft gamma-ray burst repeaters

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Gamma Ray Bursts, Neutron Stars, Stellar Mass Accretion, White Dwarf Stars, Milky Way Galaxy, Spatial Distribution

Scientific paper

A model is presented to describe soft gamma-ray repeaters (SGRs), a class of astrophysical gamma-ray burst with rapid but nonperiodic recurrence, soft spectra, and short durations. It is suggested that SGRs are due to comets falling onto a magnetized white dwarf. The results of modeling are compared to observations of the three observed SGRs. It is found that the model produces correct spectra and timescales, and solves statistical difficulties in the neutron-star model.

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