A Two-Component Jet Model for the X-Ray Afterglow Flat Segment in the Short Gamma-Ray Burst GRB 051221A | Zendy

Zhi-Ping Jin | Zendy; Ting Yan | Zendy; Yi-Zhong Fan | Zendy; D. M. Wei | Zendy

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A Two-Component Jet Model for the X-Ray Afterglow Flat Segment in the Short Gamma-Ray Burst GRB 051221A

Author(s) -

Zhi-Ping Jin,

Ting Yan,

Yi-Zhong Fan,

D. M. Wei

Publication year - 2007

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/512971

Subject(s) - gamma ray burst , afterglow , astrophysics , physics , x ray , jet (fluid) , component (thermodynamics) , astronomy , optics , mechanics , thermodynamics

In the double neutron star merger or neutron star-black hole merger model forshort GRBs, the outflow launched might be mildly magnetized and neutron rich.The magnetized neutron-rich outflow will be accelerated by the magnetic andthermal pressure and may form a two component jet finally, as suggested byVlahakis, Peng & K\"{o}nigl (2003). We show in this work that such a twocomponent jet model could well reproduce the multi-wavelength afterglowlightcurves, in particular the X-ray flat segment, of short GRB 051221A. Inthis model, the central engine need not to be active much longer than theprompt $\gamma-$ray emission.Comment: 11 pages, 2 figure; Accepted for publication by ApJ

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