论文标题
极端的大酒精：不稳定的回忆喷射的结果？
Extreme blazars: the result of unstable recollimated jets?
论文作者
论文摘要
极端的BL LACS（EHBL）形成了挑战标准排放场景的大群岛的子类。在最近的一项研究中，人们认为，如果通过相对论射流的回忆引起的一系列倾斜冲击，可以解释它们的特性。然而，新的3D模拟对回想的，弱磁化的喷气机表明，与第一次回忆性休克相应地，流动会发展出快速增长的不稳定性，变得高度湍流和减速，有效地阻碍了在2D模拟中常规观察到的多重冲击结构的形成。 Building on these new findings, we propose here a revised scenario for EHBL, in which the emission is produced by electrons accelerated at the recollimation shock and subsequently further energized through stochastic acceleration in the turbulent downstream flow.我们将这种情况的简单版本应用于原型EHBL 1ES 0229-200，表明SED可以通过主要物理参数的标准值令人满意地重现。
Extreme BL Lacs (EHBL) form a subclass of blazars which challenge standard emission scenarios. In a recent study it has been argued that their peculiar properties can be explained if emitting electrons are accelerated in a series of oblique shocks induced by the recollimation of the relativistic jet. However, new 3D simulations of recollimated, weakly magnetized jets reveal that, in correspondence with the first recollimation shock, the flow develops a rapidly growing instability, becomes highly turbulent and decelerates, effectively hampering the formation of the multiple shock structure routinely observed in 2D simulations. Building on these new findings, we propose here a revised scenario for EHBL, in which the emission is produced by electrons accelerated at the recollimation shock and subsequently further energized through stochastic acceleration in the turbulent downstream flow. We apply a simple version of this scenario to the prototypical EHBL 1ES 0229-200, showing that the SED can be satisfactorily reproduced with standard values of the main physical parameters.
