Liang, EdisonFu, WenBoettcher, MarkusSmith, IanRoustazadeh, Parisa2015-04-022015-04-022013Liang, E. et al. 2013. Relativistic positron-electron-ion shear flows and application to gamma-ray bursts. Astrophysical journal letters. 779(L27):1-8. [http://iopscience.iop.org/2041-8205]2041-82052041-8213 (Online)http://hdl.handle.net/10394/13650We present particle-in-cell simulation results of relativistic shear flows for hybrid positron–electron–ion plasmas and compare to those for pure e+e− and pure e− ion plasmas. Among the three types of relativistic shear flows, we find that only hybrid shear flow is able to energize the electrons to form a high-energy spectral peak plus a hard power law tail. Such electron spectra are needed to model the observational properties of gamma-ray bursts.enGamma-ray burst: generalmagnetic fieldsplasmasrelativistic processesArticle