论文标题
通过纠结的弱星层磁场抑制TEV配对的血浆不稳定性
Suppression of the TeV pair-beam plasma instability by a tangled weak intergalactic magnetic field
论文作者
论文摘要
我们研究了纠结的亚-FG水平磁场（IGMF）对Blazar诱导的对束的静电不稳定性的影响。足够强的IgMF可能会显着偏转TEV对梁，这将使次级级联发射的通量低于观测限制。静电束 - 血压不稳定性可能导致类似的通量减少，在没有IGMF的情况下，它的运作效果最好。考虑到相关长度小于KPC的IgMF，我们发现弱磁场会增加对梁颗粒的横向动量，从而大大降低了静电不稳定性的线性生长速率，从而降低了配对束的能量损失速率。我们表明，在磁场强度低于磁场所需的三个数量级以抑制次级级联反应所需的磁力级数量的有效损失量，将梁的不稳定性消除为有效的损失剂。对于中等强度的IGMF，我们不知道一个可行的过程来解释观察到的GEV尺度级联发射。
We study the effect of a tangled sub-fG level intergalactic magnetic field (IGMF) on the electrostatic instability of a blazar-induced pair beam. Sufficiently strong IGMF may significantly deflect the TeV pair beams, which would reduce the flux of secondary cascade emission below the observational limits. A similar flux reduction may result from the electrostatic beam-plasma instability, which operates the best in the absence of IGMF. Considering IGMF with correlation lengths smaller than a kpc, we find that weak magnetic fields increase the transverse momentum of the pair beam particles, which dramatically reduces the linear growth rate of the electrostatic instability and hence the energy-loss rate of the pair beam. We show that the beam-plasma instability is eliminated as an effective energy-loss agent at a field strength three orders of magnitude below that needed to suppress the secondary cascade emission by magnetic deflection. For intermediate-strength IGMF, we do not know a viable process to explain the observed absence of GeV-scale cascade emission.
