Now over seven years into its journey beyond the heliopause, Voyager 1 continues to return unprecedented observations of energetic particles, magnetic fields, and plasma emissions from the very local interstellar medium. Shortly after its heliopause crossing, Voyager 1 discovered an unusual time-varying galactic cosmic-ray anisotropy, characterized by smoothly changing intensity reductions in particles propagating nearly perpendicular to the magnetic field; outside of this isolated region, cosmic rays appear mostly unvarying, without a significant radial gradient. These small (∼15%) but lasting (∼100 to ∼630 days) anisotropic events are still not fully understood. Nevertheless, they serve as clear markers, together with shorter-lived cosmic-ray intensity enhancements, electron plasma oscillations, and weak laminar shocks, that even beyond the heliopause, the Sun’s variable output significantly influences its surroundings. So far, these unusual energetic particle occurrences have...

中文翻译：

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银河宇宙射线各向异性：旅行者1在非常局域的星际介质中观测到的电子

距绝经期超过七年的时间，旅行者1号继续从空前的星际介质中返回空前的高能粒子，磁场和等离子体发射的观测结果。穿越绝经期后不久，旅行者1号发现了一种异常的时变银河宇宙射线各向异性，其特征是几乎垂直于磁场传播的粒子的强度降低平稳变化。在这个孤立的区域之外，宇宙射线看起来基本不变，没有明显的径向梯度。这些小的（〜15％）但持续的（〜100至〜630天）各向异性事件仍未完全理解。尽管如此，它们还是清晰的标记，同时还有寿命较短的宇宙射线强度增强，电子等离子体振荡和薄弱的层状冲击，甚至在绝经后，太阳的可变输出也会显着影响周围环境。到目前为止，这些异常的高能粒子的发生...