The early high-energy afterglow emission from short GRBs |
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Authors: | He HaoNing Wang XiangYu |
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Institution: | 1.Department of Astronomy, Nanjing University, Nanjing, 210093, China ; |
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Abstract: | We calculate the high energy afterglow emission from short Gamma-Ray Bursts (SGRBs) in the external shock model. There are two possible components contributing to the high energy afterglow: electron synchrotron emission and synchrotron self-Compton (SSC) emission. We find that for typical parameter values of SGRBs, the early high-energy afterglow emission in 10 MeV-10 GeV is dominated by synchrotron emission. For a burst occurring at redshift z = 0.1, the high-energy emission can be detectable by Fermi LAT if the blast wave has energy E ? 1051 ergs and the fraction of electron energy ?
e
? 0.1. This provides a possible explanation for the high energy tail of SGRB 081024B. |
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