论文标题
通过自生电场排除宇宙射线从分子云中排除
Exclusion of cosmic rays from molecular clouds by self-generated electric fields
论文作者
论文摘要
最近发现，在银河系的某些地区，宇宙射线（CR）丰度比以前想象的高几个数量级。此外，有证据表明，在分子云中，Cr电离可能由电子主导。我们表明，对于具有较高的电子主导电离的区域，CR电子渗透到分子云中的渗透是由由于沉积电荷而形成的电场调节的。我们评估了这种新型自我调制机制的重要性，并表明CR穿透可以减少几个因素，例如在高离子化环境中，例如在银河系中心附近发现的。
It was recently discovered that in some regions of the Galaxy, the cosmic ray (CR) abundance is several orders of magnitude higher than previously thought. Additionally, there is evidence that in molecular cloud envelopes, the CR ionization may be dominated by electrons. We show that for regions with high, electron-dominated ionization, the penetration of CR electrons into molecular clouds is modulated by the electric field that develops as a result of the charge they deposit. We evaluate the significance of this novel mechanism of self-modulation and show that the CR penetration can be reduced by a factor of a few to a few hundred in high-ionization environments, such as those found near the Galactic center.
