论文标题
极端Blazar PGC 2402248中的非常高的能量排放机制
Very high energy emission mechanism in the extreme blazar PGC 2402248
论文作者
论文摘要
极高的高频峰值BL LAC（EHBL）的特征是同步峰频率超过$ 10^{17} $ Hz，而第二个峰值可能在几个GEV的能量范围内到几个TEV。魔术望远镜从EHBL PGC 2402248中首次检测到2018年4月19日的Multi-Tev Gamma射线，该射线是由其他几种乐器在多波长中同时观察到的。源的宽带光谱能量分布通常使用Leptonic和Hadroonic模型对其进行建模。由于光有关模型在解释许多高能量大麻的爆发事件方面取得了成功，因此我们扩展了该模型，以解释魔术望远镜观察到的PGC 2402248事件，并将其与其他模型进行比较。我们得出的结论是，光有关拟合是可比的，甚至比大多数其他型号都更好。此外，我们表明频谱并不难，并且处于低排放状态。发现此耀斑事件的估计批量洛伦兹因子是$ \ Lessim 34 $。
Extreme high-frequency peaked BL Lacs (EHBLs) are characterized by a synchrotron peak frequency exceeding $10^{17}$ Hz and a second peak that can be in the energy range of few GeVs to several TeVs. The MAGIC telescopes detected multi-TeV gamma-rays on April 19, 2018 for the first time from the EHBL PGC 2402248 which was simultaneously observed in multiwavelength by several other instruments. The broad band spectral energy distribution of the source is conventionally modelled using the leptonic and the hadronic models. Due to the success of the photohadronic model in interpreting the enigmatic very high-energy (VHE) flaring events from many high-energy blazars, we extend this model to explain the VHE events from PGC 2402248 observed by MAGIC telescopes and compare our results with other models. We conclude that the photohadronic fits are comparable and even fare better than most other models. Furthermore, we show that the spectrum is not hard and is in a low emission state. The estimated bulk Lorentz factor for this flaring event is found to be $\lesssim 34$.
