Spectral Lags Explained as Scattering from Accelerated Scatterers
Spectral Lags Explained as Scattering from Accelerated Scatterers
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DOI：
10.1086/595839
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发表时间：
2008-10
期刊：
影响因子：
--
通讯作者：
D. Eichler;Hadar Manis
中科院分区：
文献类型：
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作者：
D. Eichler;Hadar Manis
给出了伽玛射线暴(γ-ray Burst，GRB)光谱滞后的定量理论。基本的假设是，伽玛子亚脉冲是被辐射压力加速的局部重子浓度散射到我们视线中的光子。对于具有指数截止的一次光谱，发现脉冲宽度及其快上升、慢衰减的不对称性随着光子能量的降低而增加，指数截止附近的宽度约为Eph−η，其中η∼为0.4.在其他条件相同的情况下，光谱滞后时间自然与光度成反比，这也是观察到的。
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 Eph−η, where η ∼ 0.4, as observed. The spectral lag time is naturally inversely proportional to luminosity, all else being equal, also as observed.