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arXiv · 1612.02475

The interpretation of the multi-wavelength afterglow emission of short GRB 140903A

Shuai Zhang·Zhi-Ping Jin·Yuan-Zhu Wang·Da-Ming Wei
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Abstract

GRB 140903A, a short duration $\gamma-$ray burst (SGRB) detected by {\it Swift}, is characterized by its long-lasting radio emission among SGRBs. In addition to the $\sim 10^{6}$ s radio afterglow emission, the afterglow of GRB 140903A displays a plateau from $10^3$ s to $7 \times 10^3 $ s in the X-rays. In this work, we attribute the X-ray plateau to the energy injection into the decelerating blast wave and then model the later radio/optical/X-ray afterglow emission within the standard fireball afterglow model. The afterglow emission has been well reproduced with reasonable physical parameters, including a jet half-opening angle $\sim 0.05$. We also compare the physical properties of SGRBs with and without radio afterglow detections and find that nearby SGRBs are brighter and easier to be detected in radio. Such a phenomena has been interpreted within the afterglow model.

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Shuai Zhang, Zhi-Ping Jin, Yuan-Zhu Wang, Da-Ming Wei. 2016-12-07. The interpretation of the multi-wavelength afterglow emission of short GRB 140903A. https://doi.org/10.3847/1538-4357%2F835%2F1%2F73

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