论文标题
银河风气泡中的颗粒加速度
Particle acceleration in galactic wind bubbles
论文作者
论文摘要
风在星系中无处不在，通常具有气泡结构。这些风气泡的特征是外部向前冲击在周围的介质中膨胀，风终止冲击将凉爽和快速的风与热震动的风分开。虽然长时间无法有效地加速颗粒，但在风终止冲击中，可能会出现有效加速的必要条件。我们在此类气泡的终止冲击中开发了一个模型，分析了为风提供动力的不同引擎的后果。我们终于在逃避宇宙射线和高能伽玛射线和中微子来探索了银河风的多通信潜力。
Winds are ubiquitous in galaxies and often feature bubble structures. These wind bubbles are characterized by an external forward shock expanding in the surrounding medium and a wind termination shock separating the cool and fast wind from the hot shocked wind. While the forward shock could not be able to accelerate particles efficiently for a long time, at the wind termination shock the necessary conditions for efficient acceleration may be present. We develop a model for particle acceleration at the termination shock of such bubbles analysing the consequences of different possible engines powering the wind. We finally explore the multi-messenger potential of galactic winds in terms of escaping cosmic rays and high-energy gamma rays and neutrinos produced through hadronic interactions.
