论文标题
银河系中的伽玛射线脉冲星光晕
Gamma-ray Pulsar Halos in the Galaxy
论文作者
论文摘要
Pulsar Halos是由电子产生的扩展的伽马射线结构，并从Pulsar Wind Nebulae（pwne）逃脱了，它考虑了一种新的伽马射线源。它们是在星系的局部区域和粒子逃生过程中宇宙射线传播的理想指标。从脉冲星晕推断出的宇宙射线扩散系数比星系中的平均值小两个以上的数量级，这一直引起广泛的讨论。我们回顾了Pulsar Halos研究的最新进展，包括此类来源的特征，已知的Pulsar Halos，非常缓慢的扩散的可能机制，Pulsar Halos在宇宙 - 射线传播的研究中的关键作用以及对PWNE的电子注入的研究以及对cosmic portorron porterron和diffuse diffuse的影响。最后，我们根据对较大的脉冲星样品样本的预期以及对明亮来源的更深入的观察结果，为研究提供了前景。
Pulsar halos are extended gamma-ray structures generated by electrons and positrons escaping from pulsar wind nebulae (PWNe), considered a new class of gamma-ray sources. They are ideal indicators for cosmic-ray propagation in localized regions of the Galaxy and particle escape process from PWNe. The cosmic-ray diffusion coefficient inferred from pulsar halos is more than two orders of magnitude smaller than the average value in the Galaxy, which has been arousing extensive discussion. We review the recent advances in the study of pulsar halos, including the characteristics of this class of sources, the known pulsar halos, the possible mechanisms of the extremely slow diffusion, the critical roles of pulsar halos in the studies of cosmic-ray propagation and electron injection from PWNe, and the implications on the problems of the cosmic positron excess and the diffuse TeV gamma-ray excess. Finally, we give prospects for the study in this direction based on the expectation of a larger sample of pulsar halos and deeper observations for bright sources.
