A two component jet model for the X-ray afterglow flat segment in short GRB 051221A

Details A two component jet model for the X-ray afterglow flat segment in short GRB 051221A A two component jet model for the X-ray afterglow flat segment in short GRB 051221A

2006-09-30

arxiv.org/abs/astro-ph/0610010v2

Astrophys.J.656:L57-L60,2007

Astronomy and Astrophysics

Astrophysics

11 pages, 2 figure; Accepted for publication by ApJL

Scientific paper

10.1086/512971

In the double neutron star merger or neutron star-black hole merger model for short GRBs, 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 form a two component jet finally, as suggested by Vlahakis, Peng & K\"{o}nigl (2003). We show in this work that such a two component jet model could well reproduce the multi-wavelength afterglow lightcurves, in particular the X-ray flat segment, of short GRB 051221A. In this model, the central engine need not to be active much longer than the prompt $\gamma-$ray emission.

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