Journal
ASTROPHYSICAL JOURNAL
Volume 656, Issue 2, Pages L57-L60Publisher
IOP PUBLISHING LTD
DOI: 10.1086/512971
Keywords
binaries : close; gamma rays : bursts; ISM : jets and outflows; stars : neutron
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In the double neutron star merger or neutron star-black hole merger model for short gamma-ray bursts, the outflow launched might be mildly magnetized and neutron-rich. The magnetized neutron-rich outflow will be accelerated by the magnetic and thermal pressure and may finally form a two-component jet, as suggested by Vlahakis, Peng, & Konigl. We show in this work that such a two-component jet model could well reproduce the multiwavelength afterglow light curves, in particular the X-ray flat segment, of short GRB 051221A. In this model, the central engine need not be active much longer than the prompt gamma-ray emission.
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