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Galactic and Anomalous Cosmic Rays during the Recent Solar Minimum

机译:最近太阳极小时期的银河和异常宇宙射线

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The recent unusually long solar minimum offers a unique insight into the physics of cosmic ray modulation. The magnetic u0002eld was weakest ever recorded, and the u0003ux of galactic cosmic rays (GCRs) reached a record high level. Anomalous cosmic ray (ACR) u0003uxes, on the other hand, did nor exceed their 1987 level. We interpret these observations in terms of enhanced diffusion in the weaker u0002eld. The source spectrum of ACRs at the termination shock depends on the diffusion coefu0002cient inside the TS: adiabatic cooling results in a steeper source spectrum of ACRs at the TS if the diffusion into the heliosphere is easier. 1-D and 2-D model simulations will be presented and preliminary results will be compared with observational evidence.
机译:最近异常长的太阳最低峰为宇宙射线调制的物理学提供了独特的见识。磁性u0002eld是有记录以来最弱的,银河宇宙射线(GCR)的u0003ux达到了创纪录的高水平。另一方面,宇宙射线(ACR)u0003uxes也没有超过1987年的水平。我们根据在较弱的u0002场中增强的扩散来解释这些观察结果。终止电击时ACR的源光谱取决于TS内部的扩散系数:如果更容易扩散到日光层,则绝热冷却会导致TS处的ACR的源光谱更陡。将介绍一维和二维模型模拟,并将初步结果与观察证据进行比较。

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