On the enhanced X-ray emission from SGR 1900+14 after the August 27 giant flare
Ertan, Ünal and Alpar, M. Ali (2003) On the enhanced X-ray emission from SGR 1900+14 after the August 27 giant flare. Astrophysical Journal, 593 (2). L93-L96. ISSN 0004-637X
Official URL: http://dx.doi.org/10.1086/378257
We show that the giant flares of soft gamma-ray repeaters (E similar to 10(44) ergs) can push the inner regions of a fall- back disk out to larger radii by radiation pressure, while matter remains bound to the system for plausible parameters. The subsequent relaxation of this pushed-back matter can account for the observed enhanced X-ray emission after the August 27 giant flare of SGR 1900+14. Based on the results of our models, we estimate that the ratio of the fluences of the enhanced X-ray emissions to that of the preceding bursts remains constant for a particular SGR with similar preburst inner-disk conditions, which is consistent with the four different burst observations of SGR 1900+14.
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