论文标题
了解2015年6月16日从Blazar 3C 279了解巨型伽马射线爆发
Understanding the giant gamma-ray outburst on June 16, 2015 from the blazar 3C 279
论文作者
论文摘要
2015年6月16日，从Blazar 3C 279中检测到了非常明亮且快速变化的伽马射线耀斑。我们使用简单的一个区域Leptonic模型研究了源发作期间源的宽带光谱能量分布。我们发现，损坏的功率定律描述的电子能量分布可用于在高和低活动状态下重现宽带排放。无线电，红外和光学频率的通量测量是由射流磁场强度为0.37 g的相对论电子产生的同步子发射。归因于与低活性状态相对于发射区域中电子能量密度突然增强的有效加速过程。一分钟的时间尺度上的快速伽马射线变异性意味着耀斑中的发射起源于更紧凑的区域，并且发现低活动状态下的发射区的大小是耀斑期间的发射区域的四倍。我们还使用了从宽带光谱能量分布建模得出的模型参数来研究爆发期间射流的一些物理特性。
A very bright and fast varying gamma-ray flare has been detected from the blazar 3C 279 on June 16, 2015. We have studied the broadband spectral energy distribution of the source during the flaring episode and in the low activity state using a simple one zone leptonic model. We find that an electron energy distribution described by a broken power law can be used to reproduce the broadband emissions during the high and low activity states. The flux measurements at radio, infrared and optical frequencies are reproduced by the synchrotron emission resulting from the relativistic electrons in a jet magnetic field strength of 0.37 G. The gamma-ray emission from the blazar 3C 279 is attributed to the Comptonization of the IR seed photons from the dusty torus with a temperature of 870 K. The outburst from the source observed on June 16, 2015 can be ascribed to an efficient acceleration process associated with a sudden enhancement in the electron energy density in the emitting region with respect to the low activity state. The fast gamma-ray variability at a minute timescale implies that the emission during the flare originates from a more compact region and the size of the emission zone in the low activity state is found to be four times larger than that during the flare. We have also used the model parameters derived from the broadband spectral energy distribution modelling to investigate a few physical properties of the jet during the outburst.
