论文标题
MRK 501类似EHBL行为的两区光影场景
A two-zone photohadronic scenario for EHBL-like behavior of Mrk 501
论文作者
论文摘要
自1996年发现以来，从众所周知的高能峰值大型商标501中观察到了重大爆发。尤其是，2005年5月至2012年5月和2012年6月期间的两次非常高的能量伽马射线弹性事件具有特殊意义，当时源表现出极端HBL的极端HBL样行为。成功的标准光有关模型似乎不足以解释这些无关的行为。我们提出了一个两区光影场景，以克服这个问题。在这张照片中，光谱的低能状态（区域1）遵循标准的光有关解释，而光谱的高能量状态（区域2）是新的，具有频谱指数$δ_2\ geq 3.1 $，这完全是由于耀斑事件的极端性质。我们还估计了与这些极端耀斑事件相对应的大量洛伦兹因子。通过分析这些极端事件之前和之后的许多爆炸事件，我们认为极端的类似于HBL的事件是短暂的，并且可能会在以后重复。
Major outbursts have been observed from the well-known high-energy peaked blazar Markarian 501 since its discovery in 1996. Especially, two episodes of very high energy gamma-ray flaring events during May-July 2005 and June 2012 are of special significance, when the source exhibited extreme HBL-like behavior. The successful standard photohadronic model seems inadequate to explain these extraneous behaviors. We propose a two-zone photohadronic scenario to overcome this problem. In this picture, the low energy regime (zone-1) of the spectrum follows the standard photohadronic interpretation, while the high energy regime (zone-2) of the spectrum is new, with a spectral index $δ_2\geq 3.1$, which is solely due to the extreme nature of the flaring event. We also estimate the bulk Lorentz factor corresponding to these extreme flaring events. By analyzing many flaring events before and after these extreme events we argue that the extreme HBL-like events are transient and may repeat in future.
