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Spectral Lags Explained As Scattering From Accelerated Scatterers

机译:频谱滞后解释为加速散射体的散射

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摘要

A quantitative theory of spectral lags for γ-ray bursts (GRBs) is given. The underlying hypothesis is that GRB subpulses are photons that are scattered into our line of sight by local concentrations of baryons that are accelerated by radiation pressure. For primary spectra that are power laws with exponential cutoffs, the width of the pulse and its fast rise, slow decay asymmetry is found to increase with decreasing photon energy, and the width near the exponential cutoff scales approximately as E_(ph)~η, where η~0.4, as observed. The spectral lag time is naturally inversely proportional to luminosity, all else being equal, also as observed.
机译:给出了γ射线爆发(GRBs)的光谱滞后的定量理论。潜在的假设是,GRB亚脉冲是光子,它们被辐射压力加速的重子的局部浓度散射到我们的视线中。对于具有指数截止的幂定律的原始光谱,发现脉冲的宽度及其快速上升,慢衰减不对称性随光子能量的降低而增加,并且指数截止附近的宽度大约为E_(ph)〜η,观察到η〜0.4。光谱滞后时间与亮度自然成反比,所有其他条件都相等,也可以观察到。

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