论文标题
ICMART模型中的伽马射线爆发提示发射光谱和$ e_p $ Evolution模式
Gamma-ray Burst Prompt Emission Spectrum and $E_p$ Evolution Patterns in the ICMART Model
论文作者
论文摘要
在本文中，我们模拟了内部控制诱导的磁重新连接和湍流（ICMART）模型的伽马射线爆发（GRB）及时发射光曲线，光谱和$ e_p $演变模式。我们表明，该模型可以产生带状频谱，只要在适当的条件下，磁场和电子加速过程就可以从GRB观测值中分布在典型的GRB观测中，其参数（$ e_p $，$α$，$β$）可以在典型的分布中分布。另一方面，我们表明，对于一个ICMART事件，$ e_p $ Evolution始终是一种难以掩盖的模式。但是，GRB光曲线通常由多个ICMART事件组成，这些事件从根本上是由不稳定的GRB中央发动机活动驱动的。在这种情况下，我们发现，如果GRB光曲线中的一个宽脉冲由多个ICMART事件组成，则可以将整个$ e_p $ Evolution伪装成强烈的跟踪模式。因此，混合$ e_p $进化模式可以在相同的爆发中共存，并具有多种组合模式。我们的结果支持ICMART模型是一个竞争模型，以解释GRB迅速排放的主要特性。还详细讨论了ICMART模型面临的可能挑战。
In this paper, we simulate the gamma-ray bursts (GRBs) prompt emission light curve, spectrum and $E_p$ evolution patterns within the framework of the Internal-Collision-induced MAgnetic Reconnection and Turbulence (ICMART) model. We show that this model can produce a Band shape spectrum, whose parameters ($E_p$, $α$, $β$) could distribute in the typical distribution from GRB observations, as long as the magnetic field and the electron acceleration process in the emission region are under appropriate conditions. On the other hand, we show that for one ICMART event, $E_p$ evolution is always a hard-to-soft pattern. However, a GRB light curve is usually composed of multiple ICMART events that are fundamentally driven by the erratic GRB central engine activity. In this case, we find that if one individual broad pulse in the GRB light curve is composed of multiple ICMART events, the overall $E_p$ evolution could be disguised as the intense-tracking pattern. Therefore, mixed $E_p$ evolution patterns can coexist in the same burst, with a variety of combined patterns. Our results support the ICMART model to be a competitive model to explain the main properties of GRB prompt emission. The possible challenges faced by the ICMART model are also discussed in details.
