Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-01-10
Astronomy and Astrophysics
Astrophysics
7 figures, accepted by ApJ
Scientific paper
10.1086/529425
We present a geometrical methodology to interpret the periodical light curves of Soft Gamma Repeaters based on the magnetar model and the numerical arithmetic of the three-dimensional magnetosphere model for the young pulsars. The hot plasma released by the star quake is trapped in the magnetosphere and photons are emitted tangent to the local magnetic field lines. The variety of radiation morphologies in the burst tails and the persistent stages could be well explained by the trapped fireballs on different sites inside the closed field lines. Furthermore, our numerical results suggests that the pulse profile evolution of SGR 1806-20 during the 27 December 2004 giant flare is due to a lateral drift of the emitting region in the magnetosphere.
Cheng Kwong Sang
Huang Yun-Feng
Jia Jianjun
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